diff --git a/.eslintrc.cjs b/.eslintrc.cjs
index d2a138cf..9d5a27d9 100644
--- a/.eslintrc.cjs
+++ b/.eslintrc.cjs
@@ -1,8 +1,3 @@
-// Airbnb's own bans, kept: a `no-restricted-syntax` entry below replaces the whole list.
-const airbnbRestrictedSyntax = require('eslint-config-airbnb-base/rules/style').rules[
-  'no-restricted-syntax'
-];
-
 module.exports = {
   env: {
     browser: true,
@@ -67,21 +62,6 @@ module.exports = {
     "@typescript-eslint/no-shadow": "error"
   },
   overrides: [
-    {
-      // The one join path: a join is `joinEstateRoom`, which files the DM before it sends the join.
-      files: ['src/**/*.ts', 'src/**/*.tsx'],
-      excludedFiles: ['src/app/features/estate/joinEstateRoom.ts', 'src/**/*.test.*'],
-      rules: {
-        'no-restricted-syntax': [
-          ...airbnbRestrictedSyntax,
-          {
-            selector: "CallExpression[callee.property.name='joinRoom']",
-            message:
-              'Join a room through joinEstateRoom (features/estate/joinEstateRoom.ts), the one join path.',
-          },
-        ],
-      },
-    },
     {
       files: ['*.ts'],
       rules: {
diff --git a/config.json b/config.json
index 0ebdf7c3..ed1bca6b 100644
--- a/config.json
+++ b/config.json
@@ -1,13 +1,6 @@
 {
-  "defaultHomeserver": 0,
-  "homeserverList": [
-    "gamecult.org",
-    "converser.eu",
-    "matrix.org",
-    "mozilla.org",
-    "unredacted.org",
-    "xmr.se"
-  ],
+  "defaultHomeserver": 1,
+  "homeserverList": ["converser.eu", "matrix.org", "mozilla.org", "unredacted.org", "xmr.se"],
   "allowCustomHomeservers": true,
   "featuredCommunities": {
     "openAsDefault": false,
@@ -31,10 +24,5 @@
 
   "dings": {
     "enabled": false
-  },
-
-  "registration": {
-    "enabled": false,
-    "url": ""
   }
 }
diff --git a/docs/mind-feedback-pages.md b/docs/mind-feedback-pages.md
index 9ff45d08..cad15c42 100644
--- a/docs/mind-feedback-pages.md
+++ b/docs/mind-feedback-pages.md
@@ -1,7 +1,5 @@
 # Mind feedback pages
 
-> The desk reads `gamecult.fork.*` now, not the `org.gamecult.feedback.*` projections named below; see CultLib `contracts/cultnet/governance/fork-card.md` (src/app/features/desk/forkContract.ts).
-
 Design only. No code exists for this; nothing here is built. Drafted by Kiko Self (2026-11-07) with Heimdall's draft rulings
 on guests and hiding; placement ruled for this repo by Void. Follow-up `eureka-body:follow_up:ratatoskr-mind-feedback-pages`.
 Every number below is provisional.
diff --git a/harness/estate/check.cjs b/harness/estate/check.cjs
index e69f5b4a..656d532e 100644
--- a/harness/estate/check.cjs
+++ b/harness/estate/check.cjs
@@ -2,17 +2,12 @@
 // non-zero when the page or the fake homeserver's log says otherwise.
 const fs = require('fs');
 const fails = [];
-let asserted = 0;
 exports.expect = (label, ok, detail = '') => {
-  asserted += 1;
   console.log(`[ASSERT] ${ok ? 'PASS' : 'FAIL'} ${label}${ok ? '' : ` :: ${detail}`}`);
   if (!ok) fails.push(label);
 };
-/** Exit code for the drive: 4 when any assertion failed, 5 when none ran (a drive that asserts nothing proves nothing). */
-exports.done = () => {
-  if (fails.length) return 4;
-  return asserted === 0 ? 5 : 0;
-};
+/** Exit code for the drive: 4 when any assertion failed. */
+exports.done = () => (fails.length ? 4 : 0);
 /** The fake homeserver's request log (HSLOG is shared with the server process). */
 exports.hsLog = () => fs.readFileSync(process.env.HSLOG, 'utf8').split('\n');
 /** Bodies of the account-data PUTs for m.direct, in order. */
diff --git a/harness/estate/check.test.ts b/harness/estate/check.test.ts
deleted file mode 100644
index 97566997..00000000
--- a/harness/estate/check.test.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-// @vitest-environment node
-import { createRequire } from 'module';
-import { describe, expect, it, vi } from 'vitest';
-
-// A drive that asserts nothing proves nothing: its exit code must say so.
-const fresh = () => {
-  const require = createRequire(import.meta.url);
-  const path = require.resolve('./check.cjs');
-  delete require.cache[path];
-  return require('./check.cjs') as {
-    expect: (label: string, ok: boolean, detail?: string) => void;
-    done: () => number;
-  };
-};
-
-describe('estate drive exit code', () => {
-  it('is 5 when no assertion ran', () => {
-    expect(fresh().done()).toBe(5);
-  });
-
-  it('is 0 when assertions ran and all held', () => {
-    vi.spyOn(console, 'log').mockImplementation(() => undefined);
-    const c = fresh();
-    c.expect('holds', true);
-    expect(c.done()).toBe(0);
-  });
-
-  it('is 4 when any assertion failed', () => {
-    vi.spyOn(console, 'log').mockImplementation(() => undefined);
-    const c = fresh();
-    c.expect('holds', true);
-    c.expect('breaks', false, 'detail');
-    expect(c.done()).toBe(4);
-  });
-});
diff --git a/harness/scene/ridgeDemo.ts b/harness/scene/ridgeDemo.ts
index 3606d14f..931a1ad4 100644
--- a/harness/scene/ridgeDemo.ts
+++ b/harness/scene/ridgeDemo.ts
@@ -1,29 +1,12 @@
 // Standalone page for the ridge scene: full window, no host app. `?tier=still|low|full` picks the
-// tier, `?probe=1` shows the rAF median/p95 readout. The bake record (each chunk's cost, from
-// the scene's `onBake`) and the long tasks the page saw are on `window.bakes` and `window.longTasks`
-// for a driver to read. Not shipped.
+// tier, `?probe=1` shows the rAF median/p95 readout. Not shipped.
 import { startBackgroundScene } from '../../src/app/features/scene';
 import type { SceneTier } from '../../src/app/features/scene';
 
 const q = new URLSearchParams(location.search);
 const tier = (q.get('tier') ?? 'full') as SceneTier;
 const canvas = document.getElementById('c') as HTMLCanvasElement;
-const w = window as unknown as { scene: unknown; bakes: unknown[]; longTasks: number[]; firstViewMs: number };
-w.bakes = [];
-w.longTasks = [];
-try {
-  new PerformanceObserver((l) => l.getEntries().forEach((e) => w.longTasks.push(e.duration))).observe({
-    entryTypes: ['longtask'],
-  });
-} catch {
-  // No long-task entries in this browser.
-}
-const t0 = performance.now();
-startBackgroundScene({ tier }, {}, {
-  canvas,
-  onBake: (b: unknown) => w.bakes.push(b),
-} as never).then((scene) => {
-  w.firstViewMs = performance.now() - t0;
-  w.scene = scene;
+startBackgroundScene({ tier }, {}, { canvas }).then((scene) => {
+  (window as unknown as { scene: unknown }).scene = scene;
   document.title = scene ? 'ridge: running' : 'ridge: unavailable (CSS ground)';
 });
diff --git a/src/app/components/ServerConfigsLoader.test.ts b/src/app/components/ServerConfigsLoader.test.ts
deleted file mode 100644
index 527895a0..00000000
--- a/src/app/components/ServerConfigsLoader.test.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-import { afterEach, describe, expect, it, vi } from 'vitest';
-import { loadServerConfigs } from './ServerConfigsLoader';
-
-const server = (authMetadata: () => Promise<unknown>) =>
-  ({
-    getCapabilities: async () => ({}),
-    getMediaConfig: async () => ({ 'm.upload.size': 1 }),
-    getAuthMetadata: authMetadata,
-  } as unknown as Parameters<typeof loadServerConfigs>[0]);
-
-describe('loadServerConfigs', () => {
-  afterEach(() => vi.restoreAllMocks());
-
-  it('logs nothing when the homeserver has no OIDC (no auth metadata came back)', async () => {
-    const error = vi.spyOn(console, 'error').mockImplementation(() => {});
-    const configs = await loadServerConfigs(
-      server(async () => {
-        throw new Error('M_UNRECOGNIZED');
-      })
-    );
-    expect(error).not.toHaveBeenCalled();
-    expect(configs.authMetadata).toBeUndefined();
-    expect(configs.mediaConfig).toEqual({ 'm.upload.size': 1 });
-  });
-
-  it('still logs and drops auth metadata that came back malformed', async () => {
-    const error = vi.spyOn(console, 'error').mockImplementation(() => {});
-    const configs = await loadServerConfigs(server(async () => ({ issuer: 'https://x' })));
-    expect(error).toHaveBeenCalled();
-    expect(configs.authMetadata).toBeUndefined();
-  });
-});
diff --git a/src/app/components/ServerConfigsLoader.tsx b/src/app/components/ServerConfigsLoader.tsx
index ea56d8d2..3c8ce8eb 100644
--- a/src/app/components/ServerConfigsLoader.tsx
+++ b/src/app/components/ServerConfigsLoader.tsx
@@ -1,10 +1,5 @@
 import { ReactNode, useCallback, useMemo } from 'react';
-import {
-  Capabilities,
-  MatrixClient,
-  validateAuthMetadata,
-  ValidatedAuthMetadata,
-} from 'matrix-js-sdk';
+import { Capabilities, validateAuthMetadata, ValidatedAuthMetadata } from 'matrix-js-sdk';
 import { AsyncStatus, useAsyncCallbackValue } from '../hooks/useAsyncCallback';
 import { useMatrixClient } from '../hooks/useMatrixClient';
 import { MediaConfig } from '../hooks/useMediaConfig';
@@ -19,42 +14,35 @@ export type ServerConfigs = {
 type ServerConfigsLoaderProps = {
   children: (configs: ServerConfigs) => ReactNode;
 };
-/**
- * The homeserver's capabilities, media config and OIDC metadata. A homeserver with no OIDC (and the demo's pretend
- * server) returns no auth metadata: there is nothing to validate, so nothing is logged. Metadata that did come back
- * and fails validation is logged and dropped.
- */
-export async function loadServerConfigs(
-  mx: Pick<MatrixClient, 'getCapabilities' | 'getMediaConfig' | 'getAuthMetadata'>
-): Promise<ServerConfigs> {
-  const result = await Promise.allSettled([
-    mx.getCapabilities(),
-    mx.getMediaConfig(),
-    mx.getAuthMetadata(),
-  ]);
-
-  const capabilities = promiseFulfilledResult(result[0]);
-  const mediaConfig = promiseFulfilledResult(result[1]);
-  const authMetadata = promiseFulfilledResult(result[2]);
-  let validatedAuthMetadata: ValidatedAuthMetadata | undefined;
-
-  if (authMetadata) {
-    try {
-      validatedAuthMetadata = validateAuthMetadata(authMetadata);
-    } catch (e) {
-      console.error(e);
-    }
-  }
-
-  return { capabilities, mediaConfig, authMetadata: validatedAuthMetadata };
-}
-
 export function ServerConfigsLoader({ children }: ServerConfigsLoaderProps) {
   const mx = useMatrixClient();
   const fallbackConfigs = useMemo(() => ({}), []);
 
   const [configsState] = useAsyncCallbackValue<ServerConfigs, unknown>(
-    useCallback(() => loadServerConfigs(mx), [mx])
+    useCallback(async () => {
+      const result = await Promise.allSettled([
+        mx.getCapabilities(),
+        mx.getMediaConfig(),
+        mx.getAuthMetadata(),
+      ]);
+
+      const capabilities = promiseFulfilledResult(result[0]);
+      const mediaConfig = promiseFulfilledResult(result[1]);
+      const authMetadata = promiseFulfilledResult(result[2]);
+      let validatedAuthMetadata: ValidatedAuthMetadata | undefined;
+
+      try {
+        validatedAuthMetadata = validateAuthMetadata(authMetadata);
+      } catch (e) {
+        console.error(e);
+      }
+
+      return {
+        capabilities,
+        mediaConfig,
+        authMetadata: validatedAuthMetadata,
+      };
+    }, [mx])
   );
 
   const configs: ServerConfigs =
diff --git a/src/app/components/message/Reply.css.ts b/src/app/components/message/Reply.css.ts
index d5254ecb..7e5540fd 100644
--- a/src/app/components/message/Reply.css.ts
+++ b/src/app/components/message/Reply.css.ts
@@ -31,7 +31,6 @@ export const Reply = style({
 });
 
 export const ReplyContent = style({
-  minWidth: 0,
   opacity: config.opacity.P300,
 
   selectors: {
@@ -40,19 +39,3 @@ export const ReplyContent = style({
     },
   },
 });
-
-export const ReplyText = style({
-  display: '-webkit-box',
-  WebkitBoxOrient: 'vertical',
-  WebkitLineClamp: 2,
-  overflow: 'hidden',
-  minWidth: 0,
-  maxWidth: '100%',
-  overflowWrap: 'anywhere',
-  wordBreak: 'break-word',
-});
-
-export const ReplyWrap = style({
-  minWidth: 0,
-  maxWidth: '100%',
-});
diff --git a/src/app/components/message/Reply.tsx b/src/app/components/message/Reply.tsx
index 894b3b03..57bf2af9 100644
--- a/src/app/components/message/Reply.tsx
+++ b/src/app/components/message/Reply.tsx
@@ -101,14 +101,7 @@ export const Reply = as<'div', ReplyProps>(
     const bodyJSX = body ? scaleSystemEmoji(trimReplyFromBody(body)) : fallbackBody;
 
     return (
-      <Box
-        className={css.ReplyWrap}
-        direction="Row"
-        gap="200"
-        alignItems="Center"
-        {...props}
-        ref={ref}
-      >
+      <Box direction="Row" gap="200" alignItems="Center" {...props} ref={ref}>
         {threadRootId && (
           <ThreadIndicator as="button" data-event-id={threadRootId} onClick={onClick} />
         )}
@@ -126,7 +119,7 @@ export const Reply = as<'div', ReplyProps>(
           onClick={onClick}
         >
           {replyEvent !== undefined ? (
-            <Text size="T300" className={css.ReplyText}>
+            <Text size="T300" truncate>
               {badEncryption ? <MessageBadEncryptedContent /> : bodyJSX}
             </Text>
           ) : (
diff --git a/src/app/components/message/layout/Bubble.tsx b/src/app/components/message/layout/Bubble.tsx
index bd2056b9..066a827f 100644
--- a/src/app/components/message/layout/Bubble.tsx
+++ b/src/app/components/message/layout/Bubble.tsx
@@ -30,8 +30,10 @@ type BubbleLayoutProps = {
   hideBubble?: boolean;
   /** The sender is the signed-in user: right-aligned, in the accent colour, no avatar. */
   own?: boolean;
-  /** A Mind's pose portrait; it replaces the avatar and nests in a corner of the bubble. */
+  /** A Mind's pose portrait; it replaces the avatar and sits beside (wide) or inside (phone) the bubble. */
   pose?: ReactNode;
+  /** On phones the portrait floats on the other side. */
+  alt?: boolean;
   /** Delay in ms before the first-appearance animation; undefined plays none. */
   enterDelay?: number;
   before?: ReactNode;
@@ -39,7 +41,7 @@ type BubbleLayoutProps = {
 };
 
 export const BubbleLayout = as<'div', BubbleLayoutProps>(
-  ({ hideBubble, own, pose, enterDelay, before, header, children, style, ...props }, ref) => {
+  ({ hideBubble, own, pose, alt, enterDelay, before, header, children, style, ...props }, ref) => {
     // `false` is a Mind's message continuing a run: aligned with the portraits, showing none.
     const poseRow = pose !== undefined;
     const arrow = !!before && !poseRow && !own;
@@ -48,7 +50,12 @@ export const BubbleLayout = as<'div', BubbleLayoutProps>(
       <Box
         gap="300"
         {...props}
-        className={classNames(own && css.BubbleRowOwn, props.className)}
+        className={classNames(
+          poseRow && css.BubbleRowPose,
+          pose && css.BubbleRowPortrait,
+          own && css.BubbleRowOwn,
+          props.className
+        )}
         style={entering ? { ...style, ['--enter-delay' as string]: `${enterDelay}ms` } : style}
         ref={ref}
       >
@@ -60,9 +67,19 @@ export const BubbleLayout = as<'div', BubbleLayoutProps>(
         <Box
           grow={own ? 'No' : 'Yes'}
           direction="Column"
-          className={classNames(own && css.BubbleColumnOwn)}
+          className={classNames(poseRow && css.BubbleColumnPose, own && css.BubbleColumnOwn)}
         >
-          {header && <div className={classNames(own && css.BubbleHeaderOwn)}>{header}</div>}
+          {header && (
+            <div
+              className={classNames(
+                pose && css.BubbleHeaderPose,
+                pose && alt && css.BubbleHeaderPoseAlt,
+                own && css.BubbleHeaderOwn
+              )}
+            >
+              {header}
+            </div>
+          )}
           {hideBubble ? (
             children
           ) : (
@@ -72,7 +89,6 @@ export const BubbleLayout = as<'div', BubbleLayoutProps>(
                   css.BubbleContent,
                   arrow && css.BubbleContentArrowLeft,
                   poseRow && css.BubbleContentPose,
-                  pose && css.BubbleContentPortrait,
                   own && css.BubbleContentOwn,
                   entering && css.EnterBubble
                 )}
diff --git a/src/app/components/message/layout/layout.css.ts b/src/app/components/message/layout/layout.css.ts
index 3037e66b..a724241c 100644
--- a/src/app/components/message/layout/layout.css.ts
+++ b/src/app/components/message/layout/layout.css.ts
@@ -1,7 +1,6 @@
 import { createVar, globalStyle, keyframes, style, styleVariants } from '@vanilla-extract/css';
 import { recipe, RecipeVariants } from '@vanilla-extract/recipes';
 import { DefaultReset, color, config, toRem } from 'folds';
-import { MOBILE_BREAKPOINT } from '../../../hooks/useScreenSize';
 
 export const StickySection = style({
   position: 'sticky',
@@ -153,21 +152,39 @@ export const BubbleContentArrowLeft = style({
   borderTopLeftRadius: 0,
 });
 
-// A Mind's pose nests in the corner of its bubble, on phones and wide screens alike: the sprite's
-// body sits in the bubble's padding and the bubble's edge cuts it, so nothing hangs outside; the
-// text wraps around its silhouette (shape-outside, traced from the alpha channel) and the bubble
-// grows to hold it. How much of the art the edge may cut comes from pose/nest.ts.
-// Displayed width of the whole sprite image; the crop fractions are multiples of it.
-export const portraitWidth = createVar();
+// Look of the three-doors mock-up (chat.gamecult.org/mockups/three-doors): a Mind's pose sits
+// beside its bubble on wide screens; on phones it floats inside the bubble, overhanging the top
+// edge, and the text wraps around its silhouette (shape-outside on the alpha channel).
 const PHONE = 'screen and (max-width: 700px)';
-const PORTRAIT = toRem(190);
 const PHONE_PORTRAIT = 'min(38vw, 160px)';
 const PHONE_TEXT_FLOOR = toRem(170);
-const BUBBLE_PAD = toRem(12);
+const PORTRAIT_OVERHANG = 58;
+const PORTRAIT = toRem(124);
+const POSE_GUTTER = toRem(14);
 const BUBBLE_CORNER = toRem(6);
 const POP = 'cubic-bezier(0.34, 1.7, 0.64, 1)';
 const RISE = 'cubic-bezier(0.34, 1.45, 0.64, 1)';
 
+export const BubbleRowPose = style({
+  position: 'relative',
+  paddingLeft: `calc(${PORTRAIT} + ${POSE_GUTTER})`,
+  '@media': {
+    [PHONE]: {
+      paddingLeft: 0,
+    },
+  },
+});
+
+// A row that shows a portrait: room for it to hang above the bubble on phones.
+export const BubbleRowPortrait = style({
+  minHeight: PORTRAIT,
+  '@media': {
+    [PHONE]: {
+      minHeight: 0,
+    },
+  },
+});
+
 export const BubbleRowOwn = style({
   justifyContent: 'flex-end',
 });
@@ -181,29 +198,64 @@ export const BubbleHeaderOwn = style({
   alignSelf: 'flex-end',
 });
 
-// The message body is a flex column, which forms its own block formatting context and would sit
-// whole beside the floated portrait; as a plain block its lines wrap around the silhouette and
-// then run the bubble's full width below it.
-export const BubbleContentPose = style({
-  display: 'flow-root',
-  overflow: 'clip',
-  padding: BUBBLE_PAD,
-});
-
-// A bubble that shows a portrait is at least portrait + a readable column wide, or the text beside
-// it collapses to a strip.
-export const BubbleContentPortrait = style({
-  vars: { [portraitWidth]: PORTRAIT },
-  minWidth: `min(100%, calc(${portraitWidth} + ${PHONE_TEXT_FLOOR}))`,
+// Phone: name and time are one plain line in flow above the bubble, on the side opposite the
+// portrait. It is as wide as the full name needs, up to the room beside the portrait; only a name
+// longer than that wraps (and then the time drops below it). It is capped by the viewport, not by
+// the column: a short bubble's column is narrower than its own name, and a percentage cap there
+// truncated names to one letter.
+export const BubbleHeaderPose = style({
   '@media': {
     [PHONE]: {
-      vars: { [portraitWidth]: PHONE_PORTRAIT },
+      alignSelf: 'flex-end',
+      // The band above the bubble where the portrait overhangs: the header sits at its foot, beside
+      // the portrait, so the overhang needs no margin of its own.
+      minHeight: toRem(PORTRAIT_OVERHANG),
+      display: 'flex',
+      flexDirection: 'column',
+      justifyContent: 'flex-end',
+      margin: `0 ${toRem(14)} ${toRem(2)}`,
+      width: 'max-content',
+      maxWidth: `calc(100vw - ${PHONE_PORTRAIT} - ${toRem(64)})`,
+      textAlign: 'right',
     },
   },
 });
 
-globalStyle(`${BubbleContentPose} > div`, {
-  display: 'block',
+export const BubbleHeaderPoseAlt = style({
+  '@media': {
+    [PHONE]: {
+      alignSelf: 'flex-start',
+      textAlign: 'left',
+    },
+  },
+});
+
+// A portrait row with no header (nothing to fill the overhang band) keeps the band as a margin.
+globalStyle(`${BubbleRowPortrait}:not(:has(.${BubbleHeaderPose}))`, {
+  '@media': {
+    [PHONE]: {
+      marginTop: toRem(PORTRAIT_OVERHANG),
+    },
+  },
+});
+
+export const BubbleColumnPose = style({
+  position: 'relative',
+});
+
+export const BubbleContentPose = style({
+  borderRadius: config.radii.R500,
+  borderTopLeftRadius: BUBBLE_CORNER,
+  '@media': {
+    [PHONE]: {
+      display: 'flow-root',
+      // A bubble with a portrait is at least portrait + a readable column wide, or the text
+      // beside the portrait collapses to a strip.
+      minWidth: `min(100%, calc(${PHONE_PORTRAIT} + ${PHONE_TEXT_FLOOR}))`,
+      borderTopLeftRadius: config.radii.R500,
+      padding: `${toRem(24)} ${toRem(14)} ${toRem(14)}`,
+    },
+  },
 });
 
 export const BubbleContentOwn = style({
@@ -214,37 +266,51 @@ export const BubbleContentOwn = style({
   borderTopRightRadius: BUBBLE_CORNER,
 });
 
-// The button is the visible part of the sprite (the part inside the bubble's corner); the image
-// inside it is offset by the crop. The inline --pose-* fractions (of the image width) come from
-// nestView; until the art's size is known the button is simply the whole image.
 export const PoseButton = style({
-  float: 'left',
-  width: `var(--pose-bw, ${portraitWidth})`,
-  height: 'var(--pose-bh, auto)',
-  // Out into the padding on the top, bottom and outer side, so the bubble's edge is the crop.
-  margin: `calc(-1 * ${BUBBLE_PAD}) ${toRem(6)} calc(-1 * ${BUBBLE_PAD}) calc(-1 * ${BUBBLE_PAD})`,
+  position: 'absolute',
+  top: 0,
+  left: `calc(-1 * (${PORTRAIT} + ${POSE_GUTTER}))`,
+  width: PORTRAIT,
+  height: PORTRAIT,
   padding: 0,
   border: 'none',
   background: 'none',
   cursor: 'pointer',
   lineHeight: 0,
-  overflow: 'hidden',
-  shapeMargin: toRem(7),
   transformOrigin: '50% 90%',
+  '@media': {
+    [PHONE]: {
+      position: 'static',
+      float: 'left',
+      width: PHONE_PORTRAIT,
+      height: 'auto',
+      margin: `${toRem(-82)} ${toRem(8)} 0 ${toRem(-12)}`,
+      shapeMargin: toRem(7),
+      WebkitMaskImage: 'linear-gradient(#000 84%, transparent)',
+      maskImage: 'linear-gradient(#000 84%, transparent)',
+    },
+  },
 });
 
 export const PoseButtonAlt = style({
-  float: 'right',
-  margin: `calc(-1 * ${BUBBLE_PAD}) calc(-1 * ${BUBBLE_PAD}) calc(-1 * ${BUBBLE_PAD}) ${toRem(6)}`,
+  '@media': {
+    [PHONE]: {
+      float: 'right',
+      margin: `${toRem(-82)} ${toRem(-12)} 0 ${toRem(8)}`,
+    },
+  },
 });
 
 export const PosePortrait = style({
-  display: 'block',
-  width: portraitWidth,
-  maxWidth: 'none',
-  height: 'auto',
-  marginLeft: 'var(--pose-ix, 0)',
-  marginTop: 'var(--pose-iy, 0)',
+  width: '100%',
+  height: '100%',
+  objectFit: 'contain',
+  objectPosition: 'top',
+  '@media': {
+    [PHONE]: {
+      height: 'auto',
+    },
+  },
 });
 
 const pop = keyframes({
@@ -284,9 +350,6 @@ export const BubbleLeftArrow = style({
   zIndex: 1,
 });
 
-// Phone tap target: a sender name is 23 px tall, so the button grows 11 px above and below (44+ px to tap) and the
-// negative margin takes the growth back out of the layout. Hit area only: no background, border or outline moves.
-const SCREEN_PHONE = `screen and (max-width: ${MOBILE_BREAKPOINT}px)`;
 export const Username = style({
   overflow: 'hidden',
   whiteSpace: 'nowrap',
@@ -294,9 +357,6 @@ export const Username = style({
   selectors: {
     'button&': {
       cursor: 'pointer',
-      '@media': {
-        [SCREEN_PHONE]: { paddingBlock: 11, marginBlock: -11 },
-      },
     },
     'button&:hover, button&:focus-visible': {
       textDecoration: 'underline',
@@ -335,12 +395,61 @@ export const MessageTextBody = recipe({
 
 export type MessageTextBodyVariants = RecipeVariants<typeof MessageTextBody>;
 
+// The message content is a flex column, which forms its own block formatting context and so sits
+// whole beside the floated portrait: the text stays as narrow as the gap beside it for the
+// bubble's full height. As a plain block its lines wrap around the silhouette and then run the
+// bubble's full width below it.
+globalStyle(`${BubbleContentPose} > div`, {
+  '@media': {
+    [PHONE]: {
+      display: 'block',
+    },
+  },
+});
+
+// The name wraps instead of ellipsising: the header already caps its own width, and Username's own
+// nowrap + ellipsis, and the truncate on the Text inside it, clipped long names to "Heimdall o…".
+globalStyle(`${BubbleHeaderPose} ${Username}, ${BubbleHeaderPose} ${Username} *`, {
+  '@media': {
+    [PHONE]: {
+      whiteSpace: 'normal',
+      overflow: 'visible',
+      textOverflow: 'clip',
+      overflowWrap: 'break-word',
+    },
+  },
+});
+
+// A name too long for one line takes its own lines and the time drops below it, instead of the
+// name shrinking to a sliver beside the time (the header's one child is the flex row of both). The
+// row hugs the side the header sits on, so a dropped time stays under the name's edge.
+globalStyle(`${BubbleHeaderPose} > div`, {
+  '@media': {
+    [PHONE]: {
+      flexWrap: 'wrap',
+      justifyContent: 'flex-end',
+    },
+  },
+});
+
+globalStyle(`${BubbleHeaderPoseAlt} > div`, {
+  '@media': {
+    [PHONE]: {
+      justifyContent: 'flex-start',
+    },
+  },
+});
+
 // An outside list marker hangs left of its item's text and ignores the portrait's silhouette, so
 // beside a left portrait the number lands under the art. Inside, it is a word on the first line
 // and wraps around the silhouette like the rest.
 globalStyle(`${BubbleContentPose} ol, ${BubbleContentPose} ul`, {
-  listStylePosition: 'inside',
-  paddingLeft: 0,
+  '@media': {
+    [PHONE]: {
+      listStylePosition: 'inside',
+      paddingLeft: 0,
+    },
+  },
 });
 
 // While the background scene runs (html[data-scene]) a chat bubble is the one filled surface in
diff --git a/src/app/components/message/pose/PoseAvatar.tsx b/src/app/components/message/pose/PoseAvatar.tsx
index 05e60631..75a4b333 100644
--- a/src/app/components/message/pose/PoseAvatar.tsx
+++ b/src/app/components/message/pose/PoseAvatar.tsx
@@ -1,126 +1,53 @@
 import React, { useEffect, useRef, useState } from 'react';
 import classNames from 'classnames';
 import * as css from '../layout/layout.css';
-import { poseSrc, safeBox } from './poses';
-import { alphaBounds, nestView, type Box } from './nest';
+import { poseSrc } from './poses';
 import { silhouette } from './silhouette';
 
 type PoseAvatarProps = {
   mind: string;
   pose: string;
   userId: string;
-  /** Nest in the bubble's top-right corner instead of the top-left. */
+  /** Float on the right on phones. */
   alt?: boolean;
   /** Play the first-appearance pop. */
   enter?: boolean;
-  /** Without it the portrait is a plain image: no button, no tab stop. */
-  onClick?: React.MouseEventHandler<HTMLButtonElement>;
-};
-
-// Safe boxes derived from art's alpha, by source; the art is traced once.
-const traced = new Map<string, { box: Box; size: [number, number] }>();
-const trace = (img: HTMLImageElement, src: string) => {
-  const hit = traced.get(src);
-  if (hit) return hit;
-  const w = img.naturalWidth;
-  const h = img.naturalHeight;
-  const ctx = document.createElement('canvas').getContext('2d');
-  if (!ctx) return undefined;
-  ctx.canvas.width = w;
-  ctx.canvas.height = h;
-  ctx.drawImage(img, 0, 0);
-  const box = alphaBounds(ctx.getImageData(0, 0, w, h).data, w, h);
-  if (!box) return undefined;
-  const found = { box, size: [w, h] as [number, number] };
-  traced.set(src, found);
-  return found;
+  onClick: React.MouseEventHandler<HTMLButtonElement>;
 };
 
 export function PoseAvatar({ mind, pose, userId, alt, enter, onClick }: PoseAvatarProps) {
   const src = poseSrc(mind, pose, import.meta.env.BASE_URL);
   const imgRef = useRef<HTMLImageElement>(null);
   const [shape, setShape] = useState<string>();
-  const measured = safeBox(mind, pose);
-  const [derived, setDerived] = useState<{ box: Box; size: [number, number] }>();
-  const art = measured ?? (derived?.size ? derived : undefined);
-  // Measured boxes are cropped by the share Aqua's numbers allow; a box traced from the alpha is
-  // already tight to the art, so the bubble may take all of the transparent margin.
-  const view = art && nestView(art.box, art.size, !!alt, measured ? undefined : 1);
 
-  // Art with no measured box: find its extent when it loads.
-  useEffect(() => {
-    setDerived(undefined);
-    const img = imgRef.current;
-    if (!img || measured) return undefined;
-    const find = () => {
-      if (!img.complete || img.naturalWidth === 0) return;
-      try {
-        setDerived(trace(img, src));
-      } catch {
-        setDerived(undefined);
-      }
-    };
-    find();
-    img.addEventListener('load', find);
-    return () => img.removeEventListener('load', find);
-  }, [src, measured]);
-
-  // The bubble text wraps around the portrait's silhouette. Retraced when the art loads, when its
-  // crop is known, and when its width changes with the viewport.
+  // On phones the bubble text wraps around the portrait's silhouette. Retraced when the art
+  // loads and when the portrait's width changes with the viewport.
   useEffect(() => {
     const img = imgRef.current;
     if (!img) return undefined;
-    const retrace = () => {
+    const trace = () => {
       if (!img.complete || img.naturalWidth === 0) return;
       try {
-        const box = img.parentElement;
-        const style = getComputedStyle(img);
-        setShape(
-          silhouette(
-            img,
-            !alt,
-            box
-              ? {
-                  x: 0 - parseFloat(style.marginLeft || '0'),
-                  y: 0 - parseFloat(style.marginTop || '0'),
-                  width: box.clientWidth,
-                  height: box.clientHeight,
-                }
-              : undefined
-          )
-        );
+        setShape(silhouette(img, !alt));
       } catch {
         setShape(undefined);
       }
     };
-    retrace();
-    img.addEventListener('load', retrace);
-    const resize = new ResizeObserver(retrace);
+    trace();
+    img.addEventListener('load', trace);
+    const resize = new ResizeObserver(trace);
     resize.observe(img);
     return () => {
-      img.removeEventListener('load', retrace);
+      img.removeEventListener('load', trace);
       resize.disconnect();
     };
-  }, [src, alt, view?.x, view?.y, view?.width, view?.height]);
+  }, [src, alt]);
 
-  // Crop fractions are of the image's width, so one set serves every displayed size.
-  const frac = (px: number) => `calc(${css.portraitWidth} * ${px / (art?.size[0] ?? 1)})`;
-  const cropStyle =
-    art && view
-      ? ({
-          '--pose-bw': frac(view.width),
-          '--pose-bh': frac(view.height),
-          '--pose-ix': frac(-view.x),
-          '--pose-iy': frac(-view.y),
-        } as React.CSSProperties)
-      : undefined;
-
-  const Tag = onClick ? 'button' : 'span';
   return (
-    <Tag
-      type={onClick ? 'button' : undefined}
+    <button
+      type="button"
       className={classNames(css.PoseButton, alt && css.PoseButtonAlt, enter && css.EnterPortrait)}
-      style={{ ...cropStyle, shapeOutside: shape }}
+      style={{ shapeOutside: shape }}
       data-user-id={userId}
       data-pose={pose}
       onClick={onClick}
@@ -132,6 +59,6 @@ export function PoseAvatar({ mind, pose, userId, alt, enter, onClick }: PoseAvat
         alt={`${mind}, ${pose}`}
         draggable={false}
       />
-    </Tag>
+    </button>
   );
 }
diff --git a/src/app/components/message/pose/nest.test.ts b/src/app/components/message/pose/nest.test.ts
deleted file mode 100644
index d8e6f36e..00000000
--- a/src/app/components/message/pose/nest.test.ts
+++ /dev/null
@@ -1,72 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { alphaBounds, nestView } from './nest';
-import boxes from './safeBoxes.json';
-
-describe('nestView', () => {
-  // Aqua neutral: 560x374, safe box [144,22,492,317] (right margin 68, top 22).
-  it('crops half the right and top margins for a top-right nest', () => {
-    expect(nestView([144, 22, 492, 317], [560, 374], true)).toEqual({
-      x: 0,
-      y: 11,
-      width: 526,
-      height: 363,
-    });
-  });
-
-  it('crops the left margin instead for a top-left nest', () => {
-    expect(nestView([144, 22, 492, 317], [560, 374], false)).toEqual({
-      x: 72,
-      y: 11,
-      width: 488,
-      height: 363,
-    });
-  });
-
-  it('never crops the top of art already touching it (smug, headband at y=0)', () => {
-    const v = nestView([140, 0, 487, 241], [560, 374], true);
-    expect(v.y).toBe(0);
-    expect(v.height).toBe(374);
-  });
-
-  it('can take the whole margin', () => {
-    expect(nestView([10, 4, 90, 50], [100, 60], true, 1)).toEqual({
-      x: 0,
-      y: 4,
-      width: 90,
-      height: 56,
-    });
-  });
-
-  it('keeps every measured safe box intact at the default share', () => {
-    const aqua = boxes.aqua as Record<string, number[]>;
-    expect(Object.keys(aqua)).toHaveLength(15);
-    Object.values(aqua).forEach(([x0, y0, x1, y1, w, h]) => {
-      const right = nestView([x0, y0, x1, y1], [w, h], true);
-      expect(right.x).toBeLessThanOrEqual(x0);
-      expect(right.x + right.width).toBeGreaterThanOrEqual(x1);
-      expect(right.y).toBeLessThanOrEqual(y0);
-      const left = nestView([x0, y0, x1, y1], [w, h], false);
-      expect(left.x).toBeLessThanOrEqual(x0);
-      expect(left.x + left.width).toBe(w);
-    });
-  });
-});
-
-describe('alphaBounds', () => {
-  it('finds the opaque rectangle', () => {
-    const w = 6;
-    const h = 5;
-    const data = new Uint8ClampedArray(w * h * 4);
-    [
-      [2, 1],
-      [4, 3],
-    ].forEach(([x, y]) => {
-      data[(y * w + x) * 4 + 3] = 255;
-    });
-    expect(alphaBounds(data, w, h)).toEqual([2, 1, 5, 4]);
-  });
-
-  it('reports nothing for an empty image', () => {
-    expect(alphaBounds(new Uint8ClampedArray(16), 2, 2)).toBeUndefined();
-  });
-});
diff --git a/src/app/components/message/pose/nest.ts b/src/app/components/message/pose/nest.ts
deleted file mode 100644
index ffee1490..00000000
--- a/src/app/components/message/pose/nest.ts
+++ /dev/null
@@ -1,58 +0,0 @@
-// A pose nests into the corner of its bubble: the sprite's body sits in the bubble's padding and is
-// cut off by the bubble's edge, so nothing hangs outside it.
-
-/** [x0, y0, x1, y1] in image pixels, origin top-left, x1/y1 exclusive. */
-export type Box = [number, number, number, number];
-
-// Share of the room between the safe box and the image edge that the bubble edge may cut away.
-// Aqua's measurement says all of it can go; half leaves the outline a little air.
-export const CROP_SHARE = 0.5;
-
-export type NestView = {
-  /** The visible region of the image, in pixels. */
-  x: number;
-  y: number;
-  width: number;
-  height: number;
-};
-
-// The part of the image that shows, for a sprite in the bubble's top-right (`right`) or top-left
-// corner. Only the corner's two sides are cropped: the side towards the bubble's edge and the top.
-// The far side and the bottom stay whole; the bubble's bottom edge cuts the bust.
-export const nestView = (
-  safe: Box,
-  size: [number, number],
-  right: boolean,
-  share = CROP_SHARE
-): NestView => {
-  const [w, h] = size;
-  const [x0, y0, x1] = safe;
-  const side = Math.round(share * (right ? w - x1 : x0));
-  const top = Math.round(share * y0);
-  const x = right ? 0 : side;
-  return { x, y: top, width: w - side, height: h - top };
-};
-
-// Bounds of the pixels whose alpha exceeds `min`, as a safe box for art with no measured one.
-export const alphaBounds = (
-  data: ArrayLike<number>,
-  w: number,
-  h: number,
-  min = 8
-): Box | undefined => {
-  let x0 = w;
-  let y0 = h;
-  let x1 = 0;
-  let y1 = 0;
-  for (let y = 0; y < h; y += 1) {
-    for (let x = 0; x < w; x += 1) {
-      if (data[(y * w + x) * 4 + 3] > min) {
-        x0 = Math.min(x0, x);
-        x1 = Math.max(x1, x + 1);
-        y0 = Math.min(y0, y);
-        y1 = y + 1;
-      }
-    }
-  }
-  return x1 > x0 ? [x0, y0, x1, y1] : undefined;
-};
diff --git a/src/app/components/message/pose/poses.ts b/src/app/components/message/pose/poses.ts
index b1f983ea..69429090 100644
--- a/src/app/components/message/pose/poses.ts
+++ b/src/app/components/message/pose/poses.ts
@@ -1,6 +1,4 @@
 import catalogue from './catalogue.json';
-import safeBoxes from './safeBoxes.json';
-import type { Box } from './nest';
 
 // Pose labels travel in the event content under POSE_KEY. The catalogue
 // (cast-art poses/catalogue.json, synced by `npm run sync:poses`) is the only
@@ -42,14 +40,3 @@ export const resolvePose = (mind: string, label: unknown): string => {
 export const poseSrc = (mind: string, pose: string, base = '/'): string =>
   `${base}public/poses/${artPath(mind, pose) ?? artPath(mind, NEUTRAL)}`;
 
-// Safe-crop boxes measured from the art's pixels (Aqua, `aqua-pose-crop-boxes-20261110`): the
-// head and headphones plus outline, which the bubble's edge must not cut. [x0, y0, x1, y1, width,
-// height] in image pixels. Art with no entry gets its box from the sprite's alpha at load time.
-const boxes = safeBoxes as Record<string, Record<string, number[]>>;
-export const safeBox = (
-  mind: string,
-  pose: string
-): { box: Box; size: [number, number] } | undefined => {
-  const b = Object.prototype.hasOwnProperty.call(boxes, mind) ? boxes[mind][pose] : undefined;
-  return b ? { box: [b[0], b[1], b[2], b[3]], size: [b[4], b[5]] } : undefined;
-};
diff --git a/src/app/components/message/pose/safeBoxes.json b/src/app/components/message/pose/safeBoxes.json
deleted file mode 100644
index eff7011e..00000000
--- a/src/app/components/message/pose/safeBoxes.json
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-  "aqua": {
-    "neutral": [144, 22, 492, 317, 560, 374],
-    "happy": [157, 22, 506, 317, 574, 374],
-    "amused": [154, 22, 500, 317, 562, 374],
-    "thinking": [154, 16, 500, 307, 562, 374],
-    "annoyed": [154, 4, 499, 282, 562, 374],
-    "surprised": [141, 5, 485, 282, 560, 374],
-    "concerned": [156, 4, 501, 283, 574, 374],
-    "fretful": [156, 16, 503, 305, 574, 374],
-    "weary": [161, 16, 509, 307, 624, 374],
-    "glare": [160, 5, 508, 282, 624, 374],
-    "smug": [140, 0, 487, 241, 560, 374],
-    "sigh": [154, 0, 500, 241, 574, 374],
-    "charging": [152, 0, 497, 241, 562, 374],
-    "delighted": [159, 0, 507, 241, 624, 374],
-    "content": [144, 16, 492, 306, 560, 374]
-  }
-}
diff --git a/src/app/components/message/pose/silhouette.test.ts b/src/app/components/message/pose/silhouette.test.ts
index ba9d5ecb..9deb3f4f 100644
--- a/src/app/components/message/pose/silhouette.test.ts
+++ b/src/app/components/message/pose/silhouette.test.ts
@@ -53,22 +53,4 @@ describe('silhouette', () => {
       silhouette({ clientWidth: 0, clientHeight: 0 } as HTMLImageElement, true)
     ).toBeUndefined();
   });
-
-  it('traces only the visible part of a cropped portrait, drawn at its offset', () => {
-    const drawImage = vi.fn();
-    const canvas = {
-      width: 0,
-      height: 0,
-      getContext: () => ({
-        canvas,
-        drawImage,
-        getImageData: () => ({ data: new Uint8ClampedArray(40 * 8 * 4) }),
-      }),
-    };
-    vi.stubGlobal('document', { createElement: () => canvas });
-    const img = { clientWidth: 100, clientHeight: 20 } as HTMLImageElement;
-    silhouette(img, true, { x: 0, y: 12, width: 40, height: 8 });
-    expect([canvas.width, canvas.height]).toEqual([40, 8]);
-    expect(drawImage).toHaveBeenCalledWith(img, 0, -12, 100, 20);
-  });
 });
diff --git a/src/app/components/message/pose/silhouette.ts b/src/app/components/message/pose/silhouette.ts
index 019c0716..e9596ded 100644
--- a/src/app/components/message/pose/silhouette.ts
+++ b/src/app/components/message/pose/silhouette.ts
@@ -5,23 +5,14 @@ const ROW = 4;
 // `shape-outside: url()` cannot do this: the browser sizes that image at its natural size and
 // anchors it at the margin box, which the phone layout's negative top margin shifts down by the
 // overhang, so the exclusion neither matches the art's size nor its place.
-//
-// `view` is the part of the displayed image that shows (the button's box, in displayed pixels):
-// the portrait is cropped by the bubble, so the polygon is traced over what is left of the art.
-export type View = { x: number; y: number; width: number; height: number };
-
-export const silhouette = (
-  img: HTMLImageElement,
-  textOnRight: boolean,
-  view?: View
-): string | undefined => {
-  const w = Math.round(view?.width ?? img.clientWidth);
-  const h = Math.round(view?.height ?? img.clientHeight);
+export const silhouette = (img: HTMLImageElement, textOnRight: boolean): string | undefined => {
+  const w = Math.round(img.clientWidth);
+  const h = Math.round(img.clientHeight);
   const ctx = w > 0 && h > 0 ? document.createElement('canvas').getContext('2d') : null;
   if (!ctx) return undefined;
   ctx.canvas.width = w;
   ctx.canvas.height = h;
-  ctx.drawImage(img, 0 - (view?.x ?? 0), 0 - (view?.y ?? 0), img.clientWidth, img.clientHeight);
+  ctx.drawImage(img, 0, 0, w, h);
   const { data } = ctx.getImageData(0, 0, w, h);
   const outer = textOnRight ? 0 : w;
   const edge: string[] = [];
diff --git a/src/app/features/albums/AlbumView.css.ts b/src/app/features/albums/AlbumView.css.ts
deleted file mode 100644
index c4f4fc79..00000000
--- a/src/app/features/albums/AlbumView.css.ts
+++ /dev/null
@@ -1,51 +0,0 @@
-import { style } from '@vanilla-extract/css';
-import { color, config, toRem } from 'folds';
-import { MOBILE_BREAKPOINT } from '../../hooks/useScreenSize';
-
-const WIDE = `screen and (min-width: ${MOBILE_BREAKPOINT + 1}px)`;
-
-/** One column, bare ink on the scene. */
-export const Column = style({
-  maxWidth: toRem(720),
-  width: '100%',
-  margin: '0 auto',
-  padding: config.space.S400,
-  display: 'flex',
-  flexDirection: 'column',
-  gap: config.space.S200,
-});
-
-/** A tappable text row: no border, no fill, at least 44 px tall. */
-export const Row = style({
-  all: 'unset',
-  boxSizing: 'border-box',
-  cursor: 'pointer',
-  minHeight: 44,
-  display: 'flex',
-  flexDirection: 'column',
-  justifyContent: 'center',
-  gap: toRem(2),
-  color: color.Background.OnContainer,
-  ':focus-visible': { textDecoration: 'underline' },
-});
-
-export const Back = style([Row, { minHeight: 44 }]);
-
-export const Files = style({
-  display: 'flex',
-  flexDirection: 'column',
-  gap: config.space.S400,
-});
-
-/** Images may tile into a grid on wide screens only. */
-export const FilesWide = style({
-  '@media': {
-    [WIDE]: {
-      display: 'grid',
-      gridTemplateColumns: 'repeat(auto-fill, minmax(220px, 1fr))',
-      alignItems: 'start',
-    },
-  },
-});
-
-export const Dim = style({ opacity: config.opacity.P300 });
diff --git a/src/app/features/albums/AlbumView.tsx b/src/app/features/albums/AlbumView.tsx
deleted file mode 100644
index 28e0c477..00000000
--- a/src/app/features/albums/AlbumView.tsx
+++ /dev/null
@@ -1,141 +0,0 @@
-import React, { useEffect, useMemo, useState } from 'react';
-import { Box, Scroll, Text } from 'folds';
-import { Room, RoomEvent } from 'matrix-js-sdk';
-import { MediaControl } from '../../components/media';
-import { AudioContent } from '../../components/message';
-import { RenderMessageContent } from '../../components/RenderMessageContent';
-import { IAudioContent } from '../../../types/matrix/common';
-import { LINKIFY_OPTS, getReactCustomHtmlParser } from '../../plugins/react-custom-html-parser';
-import { useMatrixClient } from '../../hooks/useMatrixClient';
-import { useMediaAuthentication } from '../../hooks/useMediaAuthentication';
-import { useSetting } from '../../state/hooks/settings';
-import { settingsAtom } from '../../state/settings';
-import { markAsRead } from '../../utils/notifications';
-import { getBlobSafeMimeType } from '../../utils/mimeTypes';
-import { timeDayMonYear } from '../../utils/time';
-import { getMemberDisplayName } from '../../utils/room';
-import { Album, AlbumFile } from './buildAlbums';
-import { useAlbums } from './useAlbums';
-import * as css from './AlbumView.css';
-
-/**
- * Audio goes straight to AudioContent, skipping the chat Attachment frame and file-type badge: the
- * title above it is the only label and the transport controls sit on the scene. Anything that is
- * not playable audio falls through to the stock renderer (a file download).
- */
-const playableAudio = (content: Record<string, unknown>) => {
-  const c = content as IAudioContent;
-  const url = c.file?.url ?? c.url;
-  const mimeType = getBlobSafeMimeType(c.info?.mimetype ?? '');
-  if (!c.info || typeof url !== 'string' || !mimeType.startsWith('audio')) return undefined;
-  return { info: c.info, url, mimeType, encInfo: c.file };
-};
-
-type FileRowProps = { room: Room; file: AlbumFile; author: string };
-function FileRow({ room, file, author }: FileRowProps) {
-  const mx = useMatrixClient();
-  const useAuthentication = useMediaAuthentication();
-  const [mediaAutoLoad] = useSetting(settingsAtom, 'mediaAutoLoad');
-  const htmlReactParserOptions = useMemo(
-    () =>
-      getReactCustomHtmlParser(mx, room.roomId, { linkifyOpts: LINKIFY_OPTS, useAuthentication }),
-    [mx, room.roomId, useAuthentication]
-  );
-  const audio = file.kind === 'audio' ? playableAudio(file.content) : undefined;
-  return (
-    <Box direction="Column" gap="100">
-      <Text size="T300" truncate>
-        {file.name}
-      </Text>
-      {audio ? (
-        <AudioContent {...audio} renderMediaControl={(p) => <MediaControl {...p} />} />
-      ) : (
-        <RenderMessageContent
-          displayName={author}
-          msgType={file.content.msgtype as string}
-          ts={file.ts}
-          getContent={<T,>() => file.content as T}
-          mediaAutoLoad={mediaAutoLoad}
-          htmlReactParserOptions={htmlReactParserOptions}
-          linkifyOpts={LINKIFY_OPTS}
-        />
-      )}
-    </Box>
-  );
-}
-
-const countLabel = (n: number) => `${n} ${n === 1 ? 'file' : 'files'}`;
-
-/** The zone never mounts RoomTimeline, so it sends the read receipt the timeline would. */
-function useMarkZoneRead(room: Room) {
-  const mx = useMatrixClient();
-  const [hideActivity] = useSetting(settingsAtom, 'hideActivity');
-  useEffect(() => {
-    const mark = () => {
-      markAsRead(mx, room.roomId, hideActivity).catch(() => undefined);
-    };
-    mark();
-    room.on(RoomEvent.Timeline, mark);
-    return () => {
-      room.off(RoomEvent.Timeline, mark);
-    };
-  }, [mx, room, hideActivity]);
-}
-
-type AlbumViewProps = { room: Room; onTimeline: () => void };
-export function AlbumView({ room, onTimeline }: AlbumViewProps) {
-  useMarkZoneRead(room);
-  const { loading, error, albums } = useAlbums(room);
-  const [dateFormat] = useSetting(settingsAtom, 'dateFormatString');
-  const [openId, setOpenId] = useState<string>();
-  const open: Album | undefined = albums.find((a) => a.id === openId);
-  const authorOf = (a: Album) => getMemberDisplayName(room, a.author) ?? a.author;
-  const encrypted = room.hasEncryptionStateEvent();
-
-  let body: React.ReactNode;
-  if (loading) body = <Text>Loading albums…</Text>;
-  else if (error) body = <Text>Could not load albums: {error.message}</Text>;
-  else if (open) {
-    const images = open.files.length > 0 && open.files.every((f) => f.kind === 'image');
-    body = (
-      <>
-        <button type="button" className={css.Back} onClick={() => setOpenId(undefined)}>
-          <Text size="B400">‹ Albums</Text>
-        </button>
-        <Text size="H4">{open.title}</Text>
-        <Text size="T200" className={css.Dim}>
-          {authorOf(open)} · {countLabel(open.count)} · {timeDayMonYear(open.ts, dateFormat)}
-        </Text>
-        {open.count === 0 && <Text>This album has no files.</Text>}
-        <div className={images ? `${css.Files} ${css.FilesWide}` : css.Files}>
-          {open.files.map((f) => (
-            <FileRow key={f.id} room={room} file={f} author={authorOf(open)} />
-          ))}
-        </div>
-      </>
-    );
-  } else if (encrypted)
-    body = <Text>This zone is encrypted, so its albums cannot be listed here.</Text>;
-  else if (albums.length === 0) body = <Text>No albums yet.</Text>;
-  else {
-    body = albums.map((a) => (
-      <button key={a.id} type="button" className={css.Row} onClick={() => setOpenId(a.id)}>
-        <Text size="T400">{a.title}</Text>
-        <Text size="T200" className={css.Dim}>
-          {authorOf(a)} · {countLabel(a.count)} · {timeDayMonYear(a.ts, dateFormat)}
-        </Text>
-      </button>
-    ));
-  }
-
-  return (
-    <Scroll hideTrack visibility="Hover">
-      <div className={css.Column}>
-        {body}
-        <button type="button" className={css.Row} onClick={onTimeline}>
-          <Text size="B400">Timeline ›</Text>
-        </button>
-      </div>
-    </Scroll>
-  );
-}
diff --git a/src/app/features/albums/buildAlbums.test.ts b/src/app/features/albums/buildAlbums.test.ts
deleted file mode 100644
index 3a27bed6..00000000
--- a/src/app/features/albums/buildAlbums.test.ts
+++ /dev/null
@@ -1,216 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { AlbumInput, ZoneEvent, buildAlbums } from './buildAlbums';
-
-const root = (id: string, ts: number, over: Partial<ZoneEvent> = {}): ZoneEvent => ({
-  event_id: id,
-  type: 'm.room.message',
-  sender: '@void:x',
-  origin_server_ts: ts,
-  content: { msgtype: 'm.text', body: `album ${id}` },
-  ...over,
-});
-const reply = (id: string, ts: number, msgtype: string, body = id, extra = {}): ZoneEvent => ({
-  event_id: id,
-  type: 'm.room.message',
-  sender: '@void:x',
-  origin_server_ts: ts,
-  content: { msgtype, body, ...extra },
-});
-const one = (r: ZoneEvent, replies: ZoneEvent[]) => buildAlbums([{ root: r, replies }])[0];
-
-describe('buildAlbums', () => {
-  it('lists the newest album first', () => {
-    const inputs: AlbumInput[] = [
-      { root: root('$old', 100), replies: [] },
-      { root: root('$new', 300), replies: [] },
-      { root: root('$mid', 200), replies: [] },
-    ];
-    expect(buildAlbums(inputs).map((a) => a.id)).toEqual(['$new', '$mid', '$old']);
-  });
-
-  it('takes title, author and date from the root', () => {
-    const a = one(root('$r', 555, { sender: '@eureka:x' }), []);
-    expect([a.title, a.author, a.ts]).toEqual(['album $r', '@eureka:x', 555]);
-  });
-
-  it('lists files oldest first whatever order the server returned them in', () => {
-    const a = one(root('$r', 1), [
-      reply('$c', 30, 'm.audio'),
-      reply('$a', 10, 'm.audio'),
-      reply('$b', 20, 'm.audio'),
-    ]);
-    expect(a.files.map((f) => f.id)).toEqual(['$a', '$b', '$c']);
-  });
-
-  it('counts media replies only; a text reply is not a file', () => {
-    const a = one(root('$r', 1), [
-      reply('$t', 5, 'm.text', 'nice'),
-      reply('$n', 6, 'm.notice', 'bot'),
-      reply('$a', 10, 'm.audio'),
-      reply('$f', 11, 'm.file'),
-    ]);
-    expect(a.count).toBe(2);
-    expect(a.files.map((f) => f.id)).toEqual(['$a', '$f']);
-  });
-
-  it('keeps a root with no media as an album of zero files', () => {
-    const a = one(root('$r', 1), [reply('$t', 5, 'm.text')]);
-    expect(a).toMatchObject({ id: '$r', count: 0, files: [], cover: undefined });
-  });
-
-  it('uses the first image as the cover', () => {
-    const a = one(root('$r', 1), [
-      reply('$a', 5, 'm.audio'),
-      reply('$i2', 20, 'm.image'),
-      reply('$i1', 10, 'm.image'),
-    ]);
-    expect(a.cover?.id).toBe('$i1');
-    expect(one(root('$q', 1), [reply('$a', 5, 'm.audio')]).cover).toBeUndefined();
-  });
-
-  it('derives the kind from the msgtype', () => {
-    const a = one(root('$r', 1), [
-      reply('$1', 1, 'm.audio'),
-      reply('$2', 2, 'm.image'),
-      reply('$3', 3, 'm.video'),
-      reply('$4', 4, 'm.file'),
-    ]);
-    expect(a.files.map((f) => f.kind)).toEqual(['audio', 'image', 'video', 'file']);
-  });
-
-  it('names a file by filename, else body', () => {
-    const a = one(root('$r', 1), [
-      reply('$1', 1, 'm.audio', 'caption', { filename: 'clip.wav' }),
-      reply('$2', 2, 'm.audio', 'plain.wav'),
-    ]);
-    expect(a.files.map((f) => f.name)).toEqual(['clip.wav', 'plain.wav']);
-  });
-
-  it('does not duplicate a file the relations endpoint returned twice', () => {
-    const a = one(root('$r', 1), [reply('$a', 5, 'm.audio'), reply('$a', 5, 'm.audio')]);
-    expect(a.count).toBe(1);
-  });
-
-  it('does not duplicate an album listed twice', () => {
-    expect(
-      buildAlbums([
-        { root: root('$r', 1), replies: [] },
-        { root: root('$r', 1), replies: [] },
-      ])
-    ).toHaveLength(1);
-  });
-
-  it('skips redacted and empty events', () => {
-    const redacted = {
-      ...reply('$x', 5, 'm.audio'),
-      content: {},
-      unsigned: { redacted_because: {} },
-    };
-    const stillTyped = { ...reply('$y', 6, 'm.audio'), unsigned: { redacted_because: {} } };
-    const empty: ZoneEvent = { event_id: '$z' };
-    const a = one(root('$r', 1), [redacted, stillTyped, empty, reply('$ok', 7, 'm.audio')]);
-    expect(a.files.map((f) => f.id)).toEqual(['$ok']);
-    expect(buildAlbums([{ root: root('$g', 1, { content: {} }), replies: [] }])).toEqual([]);
-    expect(
-      buildAlbums([{ root: root('$h', 1, { unsigned: { redacted_because: {} } }), replies: [] }])
-    ).toEqual([]);
-  });
-
-  it('tolerates events with missing fields', () => {
-    const a = one({ event_id: '$r', content: { msgtype: 'm.text' } }, [
-      { event_id: '$a', content: { msgtype: 'm.audio' } },
-    ]);
-    expect(a).toMatchObject({ title: 'Untitled album', author: '', ts: 0, count: 1 });
-  });
-
-  it('does not read inherited object keys as file kinds', () => {
-    const a = one(root('$r', 1), [
-      reply('$c', 1, 'constructor'),
-      reply('$p', 2, '__proto__'),
-      reply('$t', 3, 'toString'),
-    ]);
-    expect(a.count).toBe(0);
-  });
-
-  it('skips events that are not room messages even if their content looks like media', () => {
-    const reaction = { ...reply('$x', 5, 'm.audio'), type: 'm.reaction' };
-    const a = one(root('$r', 1), [reaction, reply('$ok', 6, 'm.audio')]);
-    expect(a.files.map((f) => f.id)).toEqual(['$ok']);
-    expect(buildAlbums([{ root: root('$g', 1, { type: 'm.reaction' }), replies: [] }])).toEqual([]);
-  });
-
-  it('skips events without an event id', () => {
-    const anon: ZoneEvent = { type: 'm.room.message', content: { msgtype: 'm.audio', body: 'a' } };
-    expect(one(root('$r', 1), [anon]).count).toBe(0);
-    expect(
-      buildAlbums([{ root: { content: { msgtype: 'm.text', body: 'x' } }, replies: [] }])
-    ).toEqual([]);
-  });
-
-  it('titles an edited album by its latest edit', () => {
-    const edited = root('$r', 1, {
-      unsigned: {
-        'm.relations': {
-          'm.replace': { content: { 'm.new_content': { msgtype: 'm.text', body: 'renamed' } } },
-        },
-      },
-    });
-    expect(one(edited, []).title).toBe('renamed');
-    const emptyEdit = root('$q', 1, { unsigned: { 'm.relations': { 'm.replace': {} } } });
-    expect(one(emptyEdit, []).title).toBe('album $q');
-  });
-
-  it('survives null or non-object entries in inputs and replies', () => {
-    const bad = [null, undefined, 'x', 7] as unknown as ZoneEvent[];
-    const a = buildAlbums([
-      null as unknown as AlbumInput,
-      { root: null as unknown as ZoneEvent, replies: [] },
-      { root: root('$r', 1), replies: [...bad, reply('$ok', 2, 'm.audio')] },
-      { root: root('$s', 2), replies: null as unknown as ZoneEvent[] },
-    ]);
-    expect(a.map((x) => x.id)).toEqual(['$s', '$r']);
-    expect(a[1].files.map((f) => f.id)).toEqual(['$ok']);
-  });
-
-  it('treats a non-numeric timestamp as 0 so it sorts first, not by string order', () => {
-    const a = one(root('$r', 1), [
-      reply('$b', 20, 'm.audio'),
-      { ...reply('$bad', 0, 'm.audio'), origin_server_ts: '5' as unknown as number },
-      { ...reply('$nan', 0, 'm.audio'), origin_server_ts: NaN },
-      reply('$a', 10, 'm.audio'),
-    ]);
-    expect(a.files.map((f) => f.id)).toEqual(['$bad', '$nan', '$a', '$b']);
-    const albums = buildAlbums([
-      { root: root('$x', 100), replies: [] },
-      { root: root('$y', 0, { origin_server_ts: '999' as unknown as number }), replies: [] },
-    ]);
-    expect(albums.map((x) => [x.id, x.ts])).toEqual([
-      ['$x', 100],
-      ['$y', 0],
-    ]);
-  });
-
-  it('gives an album with an empty body a fallback title', () => {
-    expect(one(root('$r', 1, { content: { msgtype: 'm.text', body: '' } }), []).title).toBe(
-      'Untitled album'
-    );
-    expect(one(root('$q', 1, { content: { msgtype: 'm.text' } }), []).title).toBe('Untitled album');
-  });
-
-  it('never counts an edit event as a file or an album', () => {
-    const edit = reply('$e', 9, 'm.audio', '* x', {
-      'm.relates_to': { rel_type: 'm.replace', event_id: '$a' },
-      'm.new_content': { msgtype: 'm.audio', body: 'x' },
-    });
-    const a = one(root('$r', 1), [reply('$a', 5, 'm.audio'), edit]);
-    expect(a.files.map((f) => f.id)).toEqual(['$a']);
-    const rootEdit = root('$re', 1, {
-      content: { msgtype: 'm.text', body: '* t', 'm.relates_to': { rel_type: 'm.replace' } },
-    });
-    expect(buildAlbums([{ root: rootEdit, replies: [] }])).toEqual([]);
-    const threaded = reply('$t', 6, 'm.audio', 't', {
-      'm.relates_to': { rel_type: 'm.thread', event_id: '$r' },
-    });
-    expect(one(root('$q', 1), [threaded]).count).toBe(1);
-  });
-});
diff --git a/src/app/features/albums/buildAlbums.ts b/src/app/features/albums/buildAlbums.ts
deleted file mode 100644
index 8e57262b..00000000
--- a/src/app/features/albums/buildAlbums.ts
+++ /dev/null
@@ -1,121 +0,0 @@
-// Pure: turns the thread roots of a file-zone room and each root's thread replies, in the JSON
-// Synapse returns from GET /rooms/{roomId}/threads and GET /rooms/{roomId}/relations/{root}/m.thread,
-// into albums. See docs/file-zone.md for the rulings this encodes.
-
-/** The slice of a Matrix event this module reads. Every field may be missing. */
-export type ZoneEvent = {
-  event_id?: string;
-  type?: string;
-  sender?: string;
-  origin_server_ts?: number;
-  content?: Record<string, unknown>;
-  unsigned?: Record<string, unknown>;
-};
-
-export type AlbumInput = { root: ZoneEvent; replies: ZoneEvent[] };
-
-export type FileKind = 'audio' | 'image' | 'video' | 'file';
-
-export type AlbumFile = {
-  id: string;
-  kind: FileKind;
-  name: string;
-  ts: number;
-  /** The event content, as RenderMessageContent reads it. */
-  content: Record<string, unknown>;
-};
-
-export type Album = {
-  id: string;
-  title: string;
-  author: string;
-  ts: number;
-  cover?: AlbumFile;
-  files: AlbumFile[];
-  count: number;
-};
-
-// A Map, not an object: msgtype is server-supplied and "constructor" must not name a kind.
-const KIND_OF_MSGTYPE = new Map<string, FileKind>([
-  ['m.audio', 'audio'],
-  ['m.image', 'image'],
-  ['m.video', 'video'],
-  ['m.file', 'file'],
-]);
-
-// A redacted event keeps its id but loses its content and gains unsigned.redacted_because.
-const live = (
-  e: ZoneEvent
-): e is ZoneEvent & { event_id: string; content: Record<string, unknown> } =>
-  !!e &&
-  typeof e === 'object' &&
-  !!e.event_id &&
-  // An edit is an m.room.message too, but it revises an event; it is never a file or an album.
-  (e.content?.['m.relates_to'] as { rel_type?: unknown } | undefined)?.rel_type !== 'm.replace' &&
-  !e.unsigned?.redacted_because &&
-  (e.type === undefined || e.type === 'm.room.message') &&
-  typeof e.content?.msgtype === 'string';
-
-const tsOf = (v: unknown): number => (typeof v === 'number' && Number.isFinite(v) ? v : 0);
-
-const asString = (v: unknown): string => (typeof v === 'string' ? v : '');
-
-const toFile = (e: ZoneEvent): AlbumFile | undefined => {
-  if (!live(e)) return undefined;
-  const kind = KIND_OF_MSGTYPE.get(e.content.msgtype as string);
-  if (!kind) return undefined;
-  return {
-    id: e.event_id,
-    kind,
-    name: asString(e.content.filename) || asString(e.content.body),
-    ts: tsOf(e.origin_server_ts),
-    content: e.content,
-  };
-};
-
-export const UNTITLED = 'Untitled album';
-
-// An edited root carries its latest edit under unsigned["m.relations"]["m.replace"]; the title is
-// that edit's m.new_content.body, else the original body.
-const titleOf = (root: ZoneEvent & { content: Record<string, unknown> }): string => {
-  const relations = root.unsigned?.['m.relations'] as Record<string, unknown> | undefined;
-  const edit = relations?.['m.replace'] as ZoneEvent | undefined;
-  const edited = (edit?.content?.['m.new_content'] as Record<string, unknown> | undefined)?.body;
-  return asString(edited) || asString(root.content.body) || UNTITLED;
-};
-
-const toAlbum = (input: AlbumInput): Album | undefined => {
-  const { root, replies } = input ?? {};
-  if (!live(root)) return undefined;
-  const seen = new Set<string>();
-  const files = (Array.isArray(replies) ? replies : [])
-    .map(toFile)
-    .filter((f): f is AlbumFile => {
-      if (!f || seen.has(f.id)) return false;
-      seen.add(f.id);
-      return true;
-    })
-    .sort((a, b) => a.ts - b.ts);
-  return {
-    id: root.event_id,
-    title: titleOf(root),
-    author: root.sender ?? '',
-    ts: tsOf(root.origin_server_ts),
-    cover: files.find((f) => f.kind === 'image'),
-    files,
-    count: files.length,
-  };
-};
-
-/** Newest album first; files oldest first. Loose room messages never reach this function. */
-export const buildAlbums = (inputs: AlbumInput[]): Album[] => {
-  const seen = new Set<string>();
-  return inputs
-    .map(toAlbum)
-    .filter((a): a is Album => {
-      if (!a || seen.has(a.id)) return false;
-      seen.add(a.id);
-      return true;
-    })
-    .sort((a, b) => b.ts - a.ts);
-};
diff --git a/src/app/features/albums/isFileZone.test.ts b/src/app/features/albums/isFileZone.test.ts
deleted file mode 100644
index 0e55269f..00000000
--- a/src/app/features/albums/isFileZone.test.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { isFileZone } from './isFileZone';
-
-const room = { roomId: '!f:x', aliases: ['#files:x'] };
-
-describe('isFileZone', () => {
-  it('is true for the file-zone create type', () => {
-    expect(isFileZone({ ...room, createType: 'org.gamecult.file_zone' }, {})).toBe(true);
-  });
-  it('is false for other create types and for plain rooms', () => {
-    expect(isFileZone({ ...room, createType: 'm.space' }, {})).toBe(false);
-    expect(isFileZone({ ...room, createType: 'org.gamecult.other' }, {})).toBe(false);
-    expect(isFileZone({ ...room, createType: 'org.gamecult.file_zone.x' }, {})).toBe(false);
-    expect(isFileZone(room, {})).toBe(false);
-    expect(isFileZone(room, { fileZoneRooms: [] })).toBe(false);
-  });
-  it('is true when the room id or an alias is configured', () => {
-    expect(isFileZone(room, { fileZoneRooms: ['!f:x'] })).toBe(true);
-    expect(isFileZone(room, { fileZoneRooms: ['#other:x', '#files:x'] })).toBe(true);
-  });
-  it('is false when only another room is configured', () => {
-    expect(isFileZone(room, { fileZoneRooms: ['!g:x', '#g:x'] })).toBe(false);
-  });
-});
diff --git a/src/app/features/albums/isFileZone.ts b/src/app/features/albums/isFileZone.ts
deleted file mode 100644
index 071ef17b..00000000
--- a/src/app/features/albums/isFileZone.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-export const FILE_ZONE_TYPE = 'org.gamecult.file_zone';
-
-export type FileZoneRoom = {
-  roomId: string;
-  /** Canonical and alternative aliases. */
-  aliases?: string[];
-  /** The `type` of the room's m.room.create content. */
-  createType?: string;
-};
-
-/** A room is the file zone when its create type says so or the client config lists it. */
-export const isFileZone = (room: FileZoneRoom, config: { fileZoneRooms?: string[] }): boolean =>
-  room.createType === FILE_ZONE_TYPE ||
-  !!config.fileZoneRooms?.some((r) => r === room.roomId || room.aliases?.includes(r));
diff --git a/src/app/features/albums/mapLimit.test.ts b/src/app/features/albums/mapLimit.test.ts
deleted file mode 100644
index 24898cb0..00000000
--- a/src/app/features/albums/mapLimit.test.ts
+++ /dev/null
@@ -1,29 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { mapLimit } from './mapLimit';
-
-describe('mapLimit', () => {
-  it('keeps result order and never exceeds the limit', async () => {
-    let inFlight = 0;
-    let peak = 0;
-    const out = await mapLimit([5, 1, 4, 2, 3, 0], 2, async (n) => {
-      inFlight += 1;
-      peak = Math.max(peak, inFlight);
-      await new Promise((r) => {
-        setTimeout(r, n);
-      });
-      inFlight -= 1;
-      return n * 10;
-    });
-    expect(out).toEqual([50, 10, 40, 20, 30, 0]);
-    expect(peak).toBe(2);
-  });
-  it('handles an empty list and rejects when a call rejects', async () => {
-    expect(await mapLimit([], 3, async (n) => n)).toEqual([]);
-    await expect(
-      mapLimit([1, 2], 2, async (n) => {
-        if (n === 2) throw new Error('boom');
-        return n;
-      })
-    ).rejects.toThrow('boom');
-  });
-});
diff --git a/src/app/features/albums/mapLimit.ts b/src/app/features/albums/mapLimit.ts
deleted file mode 100644
index e850add0..00000000
--- a/src/app/features/albums/mapLimit.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-/** Like Promise.all(items.map(fn)) but with at most `limit` calls in flight; result order kept. */
-export const mapLimit = async <T, R>(
-  items: T[],
-  limit: number,
-  fn: (item: T) => Promise<R>
-): Promise<R[]> => {
-  const out = new Array<R>(items.length);
-  let next = 0;
-  const worker = async () => {
-    while (next < items.length) {
-      const i = next;
-      next += 1;
-      // eslint-disable-next-line no-await-in-loop
-      out[i] = await fn(items[i]);
-    }
-  };
-  await Promise.all(Array.from({ length: Math.min(limit, items.length) }, worker));
-  return out;
-};
diff --git a/src/app/features/albums/useAlbums.ts b/src/app/features/albums/useAlbums.ts
deleted file mode 100644
index a01f1efb..00000000
--- a/src/app/features/albums/useAlbums.ts
+++ /dev/null
@@ -1,73 +0,0 @@
-import { useQuery } from '@tanstack/react-query';
-import { ClientPrefix, Method, Room } from 'matrix-js-sdk';
-import { StateEvent } from '../../../types/matrix/room';
-import { useStateEvent } from '../../hooks/useStateEvent';
-import { useMatrixClient } from '../../hooks/useMatrixClient';
-import { useClientConfig } from '../../hooks/useClientConfig';
-import { Album, ZoneEvent, buildAlbums } from './buildAlbums';
-import { isFileZone } from './isFileZone';
-import { mapLimit } from './mapLimit';
-
-const REPLY_FETCHES_IN_FLIGHT = 6;
-const REFRESH_MS = 30_000;
-
-type Chunk = { chunk?: ZoneEvent[] };
-
-/** True when the room is the file zone: by its create type, or listed in the client config. */
-export const useIsFileZone = (room: Room): boolean => {
-  const config = useClientConfig();
-  // Subscribes to alias changes (alt aliases live in the same event).
-  useStateEvent(room, StateEvent.RoomCanonicalAlias);
-  const createType = room.currentState.getStateEvents('m.room.create', '')?.getContent().type;
-  return isFileZone(
-    {
-      roomId: room.roomId,
-      aliases: [room.getCanonicalAlias(), ...room.getAltAliases()].filter((a): a is string => !!a),
-      createType,
-    },
-    config
-  );
-};
-
-export type AlbumsState = { loading: boolean; error: Error | null; albums: Album[] };
-
-/**
- * Slice 1 reads ONE page of each endpoint (threads: 100 roots; replies per root: 100). A zone with
- * more albums or files than that is truncated; pagination is a later slice. Reads are made with
- * the logged-in client, so the room must be unencrypted: encrypted events carry no msgtype and
- * are skipped.
- */
-export const useAlbums = (room: Room): AlbumsState => {
-  const mx = useMatrixClient();
-  const { roomId } = room;
-  const query = useQuery({
-    queryKey: ['albums', roomId],
-    queryFn: async (): Promise<Album[]> => {
-      const get = (path: string, params: Record<string, string>) =>
-        mx.http.authedRequest<Chunk>(Method.Get, path, params, undefined, {
-          prefix: ClientPrefix.V1,
-        });
-      const room_ = encodeURIComponent(roomId);
-      const roots = (await get(`/rooms/${room_}/threads`, { limit: '100' })).chunk ?? [];
-      const inputs = await mapLimit(roots, REPLY_FETCHES_IN_FLIGHT, async (root: ZoneEvent) => ({
-        root,
-        replies:
-          (
-            await get(
-              `/rooms/${room_}/relations/${encodeURIComponent(root.event_id ?? '')}/m.thread`,
-              { limit: '100', dir: 'f' }
-            )
-          ).chunk ?? [],
-      }));
-      return buildAlbums(inputs);
-    },
-    retry: 1,
-    refetchInterval: REFRESH_MS,
-  });
-  return {
-    loading: query.isLoading,
-    // A failed refetch keeps the albums already loaded; the error shows only when there are none.
-    error: query.data ? null : (query.error as Error | null),
-    albums: query.data ?? [],
-  };
-};
diff --git a/src/app/features/albums/zoneView.test.ts b/src/app/features/albums/zoneView.test.ts
deleted file mode 100644
index 65beb9cb..00000000
--- a/src/app/features/albums/zoneView.test.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { zoneView } from './zoneView';
-
-describe('zoneView', () => {
-  it('opens albums by default and the timeline for an event deep link', () => {
-    expect(zoneView(undefined, undefined)).toBe('albums');
-    expect(zoneView(undefined, '$e')).toBe('timeline');
-  });
-  it('lets an event link win over an earlier choice of albums', () => {
-    expect(zoneView('albums', '$e')).toBe('timeline');
-  });
-  it('honours the choice when there is no event link', () => {
-    expect(zoneView('albums', undefined)).toBe('albums');
-    expect(zoneView('timeline', undefined)).toBe('timeline');
-  });
-});
diff --git a/src/app/features/albums/zoneView.ts b/src/app/features/albums/zoneView.ts
deleted file mode 100644
index 1af7f705..00000000
--- a/src/app/features/albums/zoneView.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-export type ZoneView = 'albums' | 'timeline';
-
-/** The view a file-zone room shows. A link to an event always wins; else the user's choice; else albums. */
-export const zoneView = (choice: ZoneView | undefined, eventId: string | undefined): ZoneView =>
-  eventId ? 'timeline' : choice ?? 'albums';
diff --git a/src/app/features/desk/Desk.tsx b/src/app/features/desk/Desk.tsx
deleted file mode 100644
index f1695716..00000000
--- a/src/app/features/desk/Desk.tsx
+++ /dev/null
@@ -1,56 +0,0 @@
-import React, { useEffect, useMemo, useState } from 'react';
-import { useNavigate, useParams } from 'react-router-dom';
-import { Box, Icon, IconButton, Icons, Scroll, Text } from 'folds';
-import { Page, PageContent, PageContentCenter, PageHeader } from '../../components/page';
-import { ScreenSize, useScreenSizeContext } from '../../hooks/useScreenSize';
-import { getHomePath } from '../../pages/pathUtils';
-import { DeskView } from './DeskView';
-import { unverifiedForks } from './optionsHash';
-import { deskFor } from './source';
-
-const labelOf = (mind: string) => mind.charAt(0).toUpperCase() + mind.slice(1);
-
-/** The route's page: one Mind's desk under the navigator. */
-export function Desk() {
-  const { mind = '' } = useParams();
-  const navigate = useNavigate();
-  const phone = useScreenSizeContext() === ScreenSize.Mobile;
-  const label = labelOf(mind);
-  const list = useMemo(() => deskFor(mind), [mind]);
-  // Until the recompute finishes nothing is flagged; a card that fails is withdrawn when it lands.
-  const [unverified, setUnverified] = useState<ReadonlySet<string>>(new Set());
-  useEffect(() => {
-    let live = true;
-    unverifiedForks(list?.forks ?? []).then((bad) => live && setUnverified(bad));
-    return () => {
-      live = false;
-    };
-  }, [list]);
-
-  return (
-    <Page>
-      <PageHeader balance>
-        <Box grow="Yes" alignItems="Center" gap="200">
-          <Box grow="Yes" basis="No">
-            {phone && (
-              <IconButton aria-label="Back to rooms" onClick={() => navigate(getHomePath())}>
-                <Icon src={Icons.ArrowLeft} />
-              </IconButton>
-            )}
-          </Box>
-          <Text size="H3" truncate>{`${label}'s desk`}</Text>
-          <Box grow="Yes" basis="No" />
-        </Box>
-      </PageHeader>
-      <Box style={{ position: 'relative' }} grow="Yes">
-        <Scroll hideTrack visibility="Hover">
-          <PageContent>
-            <PageContentCenter>
-              <DeskView mind={mind} label={label} list={list} unverified={unverified} />
-            </PageContentCenter>
-          </PageContent>
-        </Scroll>
-      </Box>
-    </Page>
-  );
-}
diff --git a/src/app/features/desk/DeskEntry.tsx b/src/app/features/desk/DeskEntry.tsx
deleted file mode 100644
index a36ec8e4..00000000
--- a/src/app/features/desk/DeskEntry.tsx
+++ /dev/null
@@ -1,16 +0,0 @@
-import React from 'react';
-import { Link } from 'react-router-dom';
-import { Text } from 'folds';
-import { getDeskPath } from '../../pages/pathUtils';
-import { deskFor } from './source';
-
-/** The way into a Mind's desk, set in its navigator group header; nothing at all when nothing is open. */
-export function DeskEntry({ mind }: { mind: string }) {
-  const open = deskFor(mind)?.open_count ?? 0;
-  if (open === 0) return null;
-  return (
-    <Text as={Link} to={getDeskPath(mind)} size="T200" priority="300">
-      {`Desk · ${open} open`}
-    </Text>
-  );
-}
diff --git a/src/app/features/desk/DeskView.css.ts b/src/app/features/desk/DeskView.css.ts
deleted file mode 100644
index 4c7d08a7..00000000
--- a/src/app/features/desk/DeskView.css.ts
+++ /dev/null
@@ -1,99 +0,0 @@
-import { globalStyle, style } from '@vanilla-extract/css';
-import { color, config, toRem } from 'folds';
-import { MOBILE_BREAKPOINT } from '../../hooks/useScreenSize';
-
-const PHONE = `screen and (max-width: ${MOBILE_BREAKPOINT}px)`;
-
-/** Rows and booth side by side on wide screens. */
-export const Layout = style({
-  display: 'flex',
-  gap: config.space.S500,
-  alignItems: 'flex-start',
-  '@media': { [PHONE]: { display: 'block', paddingBottom: toRem(120) } },
-});
-
-export const Rows = style({ flex: 1, minWidth: 0, margin: 0, padding: 0, listStyle: 'none' });
-
-/** A hairline splits rows; it is the only chrome. */
-export const Row = style({
-  padding: `${config.space.S300} 0`,
-  borderTop: `1px solid ${color.Background.ContainerLine}`,
-});
-
-export const Title = style({
-  margin: 0,
-  font: 'inherit',
-  fontWeight: 600,
-});
-
-/** The fold button reads as the title itself, not as a control. */
-export const Fold = style({
-  all: 'unset',
-  cursor: 'pointer',
-  display: 'block',
-  width: '100%',
-  minHeight: 44,
-  boxSizing: 'border-box',
-});
-
-export const Quiet = style({ opacity: config.opacity.P300, margin: `${config.space.S100} 0` });
-export const Body = style({ whiteSpace: 'pre-wrap', margin: `${config.space.S200} 0` });
-export const Options = style({ margin: 0, padding: 0, listStyle: 'none' });
-export const Option = style({ padding: `${config.space.S100} 0` });
-
-export const Note = style({
-  display: 'block',
-  width: '100%',
-  boxSizing: 'border-box',
-  minHeight: 44,
-  margin: `${config.space.S200} 0`,
-  font: 'inherit',
-  color: 'inherit',
-  background: 'none',
-  border: `1px solid ${color.Background.ContainerLine}`,
-  opacity: config.opacity.Disabled,
-});
-
-/** Sticky beside the rows on wide screens; a small fixed corner image on phones. */
-export const Booth = style({
-  position: 'sticky',
-  top: config.space.S400,
-  width: toRem(168),
-  flexShrink: 0,
-  '@media': {
-    [PHONE]: {
-      position: 'fixed',
-      top: 'auto',
-      right: config.space.S200,
-      bottom: config.space.S200,
-      width: toRem(88),
-    },
-  },
-});
-
-// PoseAvatar's button is laid out for message gutters; the booth takes it back into flow.
-globalStyle(`${Booth} > [data-pose]`, {
-  position: 'static',
-  float: 'none',
-  display: 'block',
-  width: '100%',
-  height: 'auto',
-  margin: 0,
-  maskImage: 'none',
-  WebkitMaskImage: 'none',
-  cursor: 'default',
-});
-
-export const BoothLine = style({
-  '@media': {
-    // Still read out by the live region; only the picture shows in the corner.
-    [PHONE]: {
-      position: 'absolute',
-      width: 1,
-      height: 1,
-      overflow: 'hidden',
-      clip: 'rect(0 0 0 0)',
-      whiteSpace: 'nowrap',
-    },
-  },
-});
diff --git a/src/app/features/desk/DeskView.test.tsx b/src/app/features/desk/DeskView.test.tsx
deleted file mode 100644
index ede59229..00000000
--- a/src/app/features/desk/DeskView.test.tsx
+++ /dev/null
@@ -1,150 +0,0 @@
-import React from 'react';
-import { renderToStaticMarkup } from 'react-dom/server';
-import { MemoryRouter } from 'react-router-dom';
-import { afterEach, describe, expect, it } from 'vitest';
-import { ScreenSize, ScreenSizeProvider } from '../../hooks/useScreenSize';
-import { DeskEntry } from './DeskEntry';
-import { DeskView, SIGN_IN_NOTE } from './DeskView';
-import { STATES } from './fixtures';
-import { setDeskSource } from './source';
-
-const view = (
-  state: keyof typeof STATES | 'unpublished',
-  size: ScreenSize,
-  mind = 'void',
-  unverified = new Set<string>()
-) =>
-  renderToStaticMarkup(
-    <ScreenSizeProvider value={size}>
-      <DeskView
-        mind={mind}
-        label="Void"
-        list={state === 'unpublished' ? undefined : STATES[state]}
-        unverified={unverified}
-      />
-    </ScreenSizeProvider>
-  );
-
-describe('DeskView', () => {
-  it('folds a row behind its title on a phone, with the fold button saying so', () => {
-    const html = view('noAnswers', ScreenSize.Mobile);
-    expect(html).toContain('aria-expanded="false"');
-    expect(html).toContain('Question plain');
-    expect(html).not.toContain('Context for plain');
-    expect(html).not.toContain('First way');
-  });
-  it('shows the row open, with no fold button, on a wide screen', () => {
-    const html = view('noAnswers', ScreenSize.Desktop);
-    expect(html).not.toContain('aria-expanded');
-    expect(html).toContain('Context for plain');
-    expect(html).toContain('First way');
-  });
-  it('states the recommendation in words, on that option only', () => {
-    const html = view('noAnswers', ScreenSize.Desktop);
-    expect(html.match(/\(recommended\)/g)).toHaveLength(1);
-    expect(html).toContain('B  Second way (recommended)');
-  });
-  it('keeps the note disabled and says why in a sentence the field points at', () => {
-    const html = view('noAnswers', ScreenSize.Desktop);
-    expect(html).toMatch(/<textarea[^>]* disabled=""/);
-    expect(html).toContain(SIGN_IN_NOTE);
-    expect(SIGN_IN_NOTE).toMatch(/sign-in/);
-    expect(html).toMatch(/aria-describedby="note-[^"]+-why"/);
-  });
-  it('shows the depends line as the text it is', () => {
-    expect(view('blocked', ScreenSize.Desktop)).toContain(
-      'Waits on: &quot;Needs the first one settled&quot;'
-    );
-  });
-  it('says No answers yet on a row without answers', () => {
-    expect(view('noAnswers', ScreenSize.Desktop)).toContain('No answers yet.');
-  });
-  it('lists settled questions as recorded rulings with the ruling id', () => {
-    const html = view('settled', ScreenSize.Desktop);
-    expect(html).toContain('Recorded as rulings');
-    expect(html).toContain('Question done (ruling:done-1)');
-    expect(html).not.toContain('Question shut');
-  });
-  it('shows each outcome quietly, marks the counted answer, and renders a note only when sent', () => {
-    const html = view('answered', ScreenSize.Desktop);
-    expect(html).toContain(
-      'Answer First way &quot;Because it is first.&quot; (2026-11-09) (counted)'
-    );
-    expect(html).toContain('Revision of n1 Third way (2026-11-09)');
-    expect(html).toContain('Retraction of n2 (2026-11-09)');
-    expect(html).toContain('Refused (not_a_decider) Second way &quot;Let me in.&quot;');
-    expect(html).toContain('Answer &quot;Either, if measured first.&quot;');
-    expect(html.match(/\(counted\)/g)).toHaveLength(1);
-    expect(html).not.toContain('&quot;null&quot;');
-  });
-  it('says nothing is waiting when empty, and that nothing is published when it never arrived', () => {
-    expect(view('empty', ScreenSize.Desktop)).toContain('Nothing is waiting on you from Void.');
-    expect(view('unpublished', ScreenSize.Desktop)).toContain(
-      'Void&#x27;s questions have not been published yet.'
-    );
-  });
-  it('seats the Mind in the booth with the pose for the desk mood', () => {
-    const html = view('noAnswers', ScreenSize.Desktop);
-    expect(html).toContain('data-pose="thinking"');
-    expect(html).toContain('Just one fork on the desk.');
-  });
-  it('makes the booth portrait a plain image: no button, no tab stop', () => {
-    const html = view('noAnswers', ScreenSize.Desktop);
-    const booth = html.slice(html.indexOf('data-pose'));
-    expect(booth).toContain('<img');
-    expect(html).not.toMatch(/<button[^>]*data-pose/);
-    expect(html).not.toMatch(/<[a-z]+[^>]*data-pose[^>]*tabindex/);
-    expect(html).toMatch(/<span[^>]*data-pose/);
-  });
-  it('withdraws a card whose hash does not match and does not count it open', () => {
-    const html = view('noAnswers', ScreenSize.Desktop, 'void', new Set(['c:question:plain']));
-    expect(html).toContain('does not match the hash it was published with');
-    expect(html).not.toContain('First way');
-    expect(html).toContain('1 open.');
-    expect(html).not.toContain('Nothing is waiting');
-  });
-  it('never claims an empty desk while the list says forks are open, whatever rows it could show', () => {
-    setDeskSource(() => undefined);
-    const html = renderToStaticMarkup(
-      <ScreenSizeProvider value={ScreenSize.Desktop}>
-        <DeskView mind="void" label="Void" list={{ ...STATES.empty, open_count: 3 }} />
-      </ScreenSizeProvider>
-    );
-    expect(html).toContain('3 open.');
-    expect(html).not.toContain('Nothing is waiting');
-  });
-  it('shows no booth for a Mind without art rather than another face', () => {
-    expect(view('noAnswers', ScreenSize.Desktop, 'nobody')).not.toContain('data-pose');
-  });
-  it('shows no booth before anything is published', () => {
-    expect(view('unpublished', ScreenSize.Desktop)).not.toContain('data-pose');
-  });
-});
-
-describe('DeskEntry', () => {
-  afterEach(() => setDeskSource(() => undefined));
-  const entry = (mind: string) =>
-    renderToStaticMarkup(
-      <MemoryRouter>
-        <DeskEntry mind={mind} />
-      </MemoryRouter>
-    );
-  it('reads "Desk · N open" and links to that Mind\'s desk', () => {
-    setDeskSource(() => STATES.blocked);
-    const html = entry('void');
-    expect(html).toContain('Desk · 2 open');
-    expect(html).toContain('href="/desk/void"');
-  });
-  it('reads the count the list states, not a count of the forks it carries', () => {
-    setDeskSource(() => ({ ...STATES.empty, open_count: 5 }));
-    expect(entry('void')).toContain('Desk · 5 open');
-  });
-  it('is absent at zero open, when nothing is published, and when only settled forks exist', () => {
-    setDeskSource(() => STATES.empty);
-    expect(entry('void')).toBe('');
-    setDeskSource(() => undefined);
-    expect(entry('void')).toBe('');
-    setDeskSource(() => ({ ...STATES.settled, open_count: 0 }));
-    expect(entry('void')).toBe('');
-  });
-});
diff --git a/src/app/features/desk/DeskView.tsx b/src/app/features/desk/DeskView.tsx
deleted file mode 100644
index e57bfa70..00000000
--- a/src/app/features/desk/DeskView.tsx
+++ /dev/null
@@ -1,169 +0,0 @@
-import React, { useState } from 'react';
-import { Text } from 'folds';
-import { PoseAvatar } from '../../components/message/pose/PoseAvatar';
-import { MINDS } from '../../components/message/pose/poses';
-import { ScreenSize, useScreenSizeContext } from '../../hooks/useScreenSize';
-import { AnswerRow, Desk, buildDesk, DeskRow } from './buildDesk';
-import { ForkList } from './forkContract';
-import { deskMood } from './deskMood';
-import * as css from './DeskView.css';
-
-/** Slice 1 has no session: every viewer is signed out, and the note says why it cannot be used. */
-export const SIGN_IN_NOTE = 'Answering opens with sign-in. Until then you can read the questions.';
-
-const date = (iso: string) => iso.slice(0, 10);
-
-const OUTCOME: Record<AnswerRow['outcome'], string> = {
-  Counted: 'Answer',
-  Revision: 'Revision',
-  Retraction: 'Retraction',
-  Refused: 'Refused',
-};
-
-/** One answer as served: its outcome, what it chose, its note when the server sent one, and whether it counts. */
-const answerLine = (a: AnswerRow) =>
-  [
-    OUTCOME[a.outcome] + (a.code ? ` (${a.code})` : ''),
-    a.target && `of ${a.target}`,
-    a.choice,
-    a.note !== undefined && `"${a.note}"`,
-  ]
-    .filter(Boolean)
-    .join(' ');
-
-function Answers({ answers }: { answers: AnswerRow[] }) {
-  if (answers.length === 0) return <p className={css.Quiet}>No answers yet.</p>;
-  return (
-    <ul className={css.Options}>
-      {answers.map((a) => (
-        <li key={a.answerId} className={css.Option}>
-          {`${answerLine(a)} (${date(a.at)})`}
-          {a.counted && ' (counted)'}
-        </li>
-      ))}
-    </ul>
-  );
-}
-
-function Row({ row }: { row: DeskRow }) {
-  const phone = useScreenSizeContext() === ScreenSize.Mobile;
-  // Phones list titles; a tap opens one. Wide screens show every row open.
-  const [open, setOpen] = useState(!phone);
-  if (row.kind === 'unverified') {
-    return (
-      <li className={css.Row}>
-        <p className={css.Quiet}>
-          A question here does not match the hash it was published with, so it is not shown.
-        </p>
-      </li>
-    );
-  }
-  const noteId = `note-${row.forkId}`;
-  return (
-    <li className={css.Row}>
-      <h3 className={css.Title}>
-        {phone ? (
-          <button
-            type="button"
-            className={css.Fold}
-            aria-expanded={open}
-            onClick={() => setOpen(!open)}
-          >
-            {row.title}
-          </button>
-        ) : (
-          row.title
-        )}
-      </h3>
-      {open && (
-        <>
-          <p className={css.Body}>{row.context}</p>
-          <ul className={css.Options}>
-            {row.options.map((o) => (
-              <li key={o.id} className={css.Option}>
-                {`${o.id}  ${o.text}`}
-                {o.recommended && ' (recommended)'}
-              </li>
-            ))}
-          </ul>
-          {row.depends.map((d) => (
-            <p key={d} className={css.Quiet}>
-              {`Waits on: "${d}"`}
-            </p>
-          ))}
-          <span id={`${noteId}-label`}>Your note</span>
-          <textarea
-            className={css.Note}
-            disabled
-            aria-labelledby={`${noteId}-label`}
-            aria-describedby={`${noteId}-why`}
-          />
-          <p id={`${noteId}-why`} className={css.Quiet}>
-            {SIGN_IN_NOTE}
-          </p>
-          <Answers answers={row.answers} />
-        </>
-      )}
-    </li>
-  );
-}
-
-function Status({ desk, label }: { desk: Desk; label: string }) {
-  if (!desk.published) return <p>{`${label}'s questions have not been published yet.`}</p>;
-  return (
-    <p role="status">
-      {desk.counts.open === 0
-        ? `Nothing is waiting on you from ${label}. `
-        : `${desk.counts.open} open.`}
-    </p>
-  );
-}
-
-type DeskViewProps = {
-  /** The Mind's key, as the navigator groups it. */
-  mind: string;
-  label: string;
-  list?: ForkList;
-  /** Fork ids whose options_hash failed the recompute (optionsHash.ts). */
-  unverified?: ReadonlySet<string>;
-};
-
-/** One Mind's desk, read-only: a stream of rows, the recorded rulings, and the booth Persona. */
-export function DeskView({ mind, label, list, unverified }: DeskViewProps) {
-  const desk = buildDesk(list, unverified);
-  // Slice 1 has no session, so nothing on the desk is the viewer's answer yet.
-  const mood = deskMood(desk.counts.open, 0);
-  return (
-    <section aria-label={`${label}'s desk`}>
-      <Status desk={desk} label={label} />
-      <div className={css.Layout}>
-        <ol className={css.Rows}>
-          {desk.open.map((row) => (
-            <Row key={row.forkId} row={row} />
-          ))}
-        </ol>
-        {/* Only Minds with art in the catalogue get a booth; none gets another Mind's face. */}
-        {desk.published && MINDS.includes(mind) && (
-          <div className={css.Booth}>
-            <PoseAvatar mind={mind} pose={mood.pose} userId={mind} />
-            <Text className={css.BoothLine} size="T200" aria-live="polite">
-              {mood.line}
-            </Text>
-          </div>
-        )}
-      </div>
-      {desk.recorded.length > 0 && (
-        <>
-          <h3 className={css.Title}>Recorded as rulings</h3>
-          <ul className={css.Options}>
-            {desk.recorded.map((r) => (
-              <li key={r.forkId} className={css.Option}>
-                {`${r.title} (${r.rulingId})`}
-              </li>
-            ))}
-          </ul>
-        </>
-      )}
-    </section>
-  );
-}
diff --git a/src/app/features/desk/buildDesk.test.ts b/src/app/features/desk/buildDesk.test.ts
deleted file mode 100644
index e4a81248..00000000
--- a/src/app/features/desk/buildDesk.test.ts
+++ /dev/null
@@ -1,105 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { buildDesk } from './buildDesk';
-import { STATES, entry, list } from './fixtures';
-
-const questions = (d: ReturnType<typeof buildDesk>) =>
-  d.open.flatMap((r) => (r.kind === 'question' ? [r] : []));
-
-describe('buildDesk', () => {
-  it('says "not published" for a list that never arrived, never "no questions"', () => {
-    expect(buildDesk(undefined)).toMatchObject({ published: false, open: [], counts: { open: 0 } });
-  });
-  it('is published and empty when the list holds nothing', () => {
-    expect(buildDesk(STATES.empty)).toMatchObject({
-      published: true,
-      open: [],
-      counts: { open: 0 },
-    });
-  });
-  it('shows no answers as an empty list on an open row', () => {
-    expect(questions(buildDesk(STATES.noAnswers))[0].answers).toEqual([]);
-  });
-  it('resolves the recommendation to its option, marks only that option, and never preselects', () => {
-    const [row] = questions(buildDesk(STATES.noAnswers));
-    expect(row.recommended).toBe('Second way');
-    expect(row.options.filter((o) => o.recommended).map((o) => o.id)).toEqual(['B']);
-  });
-  it('leaves the recommendation unresolved when it names no option', () => {
-    const [row] = questions(buildDesk(list([entry('x', { recommendation: 'Z' })])));
-    expect(row.recommended).toBeUndefined();
-    expect(row.options.some((o) => o.recommended)).toBe(false);
-  });
-  it('carries the depends lines as the text they are', () => {
-    const rows = questions(buildDesk(STATES.blocked));
-    expect(rows.find((r) => r.forkId.endsWith('second'))?.depends).toEqual([
-      'Needs the first one settled',
-    ]);
-    expect(rows.find((r) => r.forkId.endsWith('first'))?.depends).toEqual([]);
-  });
-  it('lists a closed card with a ruling as recorded, not open; omits one closed with no ruling', () => {
-    const d = buildDesk(STATES.settled);
-    expect(d.recorded).toEqual([
-      { forkId: 'c:question:done', title: 'Question done', rulingId: 'ruling:done-1' },
-    ]);
-    expect(d.open.map((r) => r.forkId)).toEqual(['c:question:live']);
-  });
-  it('keeps the served order (newest first by card.order) and sorts nothing itself', () => {
-    const served = list([entry('late', { order: 9 }), entry('early', { order: 2 })]);
-    expect(buildDesk(served).open.map((r) => r.forkId)).toEqual([
-      'c:question:late',
-      'c:question:early',
-    ]);
-    const odd = list([entry('a', { order: 2 }), entry('b', { order: 9 })]);
-    expect(buildDesk(odd).open.map((r) => r.forkId)).toEqual(['c:question:a', 'c:question:b']);
-  });
-  it("takes the open count from the list's open_count, not from the rows it could verify or carries", () => {
-    const d = buildDesk({ ...list([entry('only')]), open_count: 4 }, new Set(['c:question:only']));
-    expect(d.counts.open).toBe(4);
-  });
-  it('marks the answer the record names as counted, and no other', () => {
-    const [row] = questions(buildDesk(STATES.answered));
-    expect(row.answers.filter((a) => a.counted).map((a) => a.answerId)).toEqual(['n1']);
-  });
-  it('follows the record when a revision is the counted answer: nothing is re-derived', () => {
-    const e = STATES.answered.forks[0];
-    const moved = list([{ ...e, record: { ...e.record, counted_answer_id: 'n2' } }]);
-    expect(
-      questions(buildDesk(moved))[0]
-        .answers.filter((a) => a.counted)
-        .map((a) => a.answerId)
-    ).toEqual(['n2']);
-  });
-  it('keeps answers in the served order and carries each outcome, target and refusal code', () => {
-    const [row] = questions(buildDesk(STATES.answered));
-    expect(row.answers.map((a) => [a.answerId, a.outcome, a.target, a.code])).toEqual([
-      ['n1', 'Counted', undefined, undefined],
-      ['n2', 'Revision', 'n1', undefined],
-      ['n3', 'Retraction', 'n2', undefined],
-      ['n4', 'Refused', undefined, 'not_a_decider'],
-      ['n5', 'Counted', undefined, undefined],
-    ]);
-  });
-  it('shows a choice as option text, passes an unknown id through, and leaves a null choice absent', () => {
-    const [row] = questions(buildDesk(STATES.answered));
-    expect(row.answers.map((a) => a.choice)).toEqual([
-      'First way',
-      'Third way',
-      undefined,
-      'Second way',
-      undefined,
-    ]);
-    const odd = list([
-      entry('odd', {}, [{ ...STATES.answered.forks[0].record.answers[0], choice: 'Q' }]),
-    ]);
-    expect(questions(buildDesk(odd))[0].answers[0].choice).toBe('Q');
-  });
-  it('carries a note verbatim when present and leaves it absent when null', () => {
-    const [row] = questions(buildDesk(STATES.answered));
-    expect(row.answers[0].note).toBe('Because it is first.');
-    expect(row.answers[1].note).toBeUndefined();
-  });
-  it('withdraws an unverified open card and does not count it', () => {
-    const d = buildDesk(STATES.noAnswers, new Set(['c:question:plain']));
-    expect(d.open).toEqual([{ kind: 'unverified', forkId: 'c:question:plain' }]);
-  });
-});
diff --git a/src/app/features/desk/buildDesk.ts b/src/app/features/desk/buildDesk.ts
deleted file mode 100644
index e09dec1f..00000000
--- a/src/app/features/desk/buildDesk.ts
+++ /dev/null
@@ -1,95 +0,0 @@
-import { DeskAnswer, ForkEntry, ForkList } from './forkContract';
-
-export type AnswerRow = {
-  answerId: string;
-  outcome: DeskAnswer['outcome'];
-  /** The option's text for a choice. */
-  choice?: string;
-  /** Verbatim, and only when the server sent one. */
-  note?: string;
-  /** The answer a Revision or Retraction points at. */
-  target?: string;
-  /** A refusal's code. */
-  code?: string;
-  at: string;
-  /** The record's counted answer: marked as served, never derived here. */
-  counted: boolean;
-};
-
-export type DeskRow =
-  /** Its published options_hash is not the hash of what it shows: neither shown nor counted. */
-  | { kind: 'unverified'; forkId: string }
-  | {
-      kind: 'question';
-      forkId: string;
-      title: string;
-      context: string;
-      options: { id: string; text: string; recommended: boolean }[];
-      /** The recommendation resolved to its option's text; absent if it names no option. */
-      recommended?: string;
-      depends: string[];
-      /** In admission order, as served. */
-      answers: AnswerRow[];
-    };
-
-export type Desk = {
-  /** False until the list first arrives: "not published yet", never "no questions". */
-  published: boolean;
-  /** Oldest first, by the card's admission ordinal. */
-  open: DeskRow[];
-  /** Closed with a ruling id. A card closed with no ruling (withdrawn) is not listed. */
-  recorded: { forkId: string; title: string; rulingId: string }[];
-  /** The list's own open_count: the one count the navigator, the status line and the booth share. */
-  counts: { open: number };
-};
-
-const answerRow = (a: DeskAnswer, entry: ForkEntry): AnswerRow => ({
-  answerId: a.answer_id,
-  outcome: a.outcome,
-  choice:
-    a.choice === null
-      ? undefined
-      : entry.card.options.find((o) => o.id === a.choice)?.text ?? a.choice,
-  note: a.note ?? undefined,
-  target: a.of ?? a.retracts ?? undefined,
-  code: a.code ?? undefined,
-  at: a.answered_at,
-  counted: entry.record.counted_answer_id === a.answer_id,
-});
-
-export const buildDesk = (
-  list: ForkList | undefined,
-  unverified: ReadonlySet<string> = new Set()
-): Desk => {
-  if (!list) return { published: false, open: [], recorded: [], counts: { open: 0 } };
-  const open: DeskRow[] = [];
-  const recorded: Desk['recorded'] = [];
-  list.forks.forEach((entry) => {
-    const { card, record } = entry;
-    if (card.status === 'closed') {
-      if (card.ruling !== null)
-        recorded.push({ forkId: card.fork_id, title: card.title, rulingId: card.ruling });
-      return;
-    }
-    if (unverified.has(card.fork_id)) {
-      open.push({ kind: 'unverified', forkId: card.fork_id });
-      return;
-    }
-    open.push({
-      kind: 'question',
-      forkId: card.fork_id,
-      title: card.title,
-      context: card.context,
-      options: card.options.map((o) => ({ ...o, recommended: o.id === card.recommendation })),
-      recommended: card.options.find((o) => o.id === card.recommendation)?.text,
-      depends: card.depends,
-      answers: record.answers.map((a) => answerRow(a, entry)),
-    });
-  });
-  return {
-    published: true,
-    open,
-    recorded,
-    counts: { open: list.open_count },
-  };
-};
diff --git a/src/app/features/desk/deskMood.test.ts b/src/app/features/desk/deskMood.test.ts
deleted file mode 100644
index 9c981640..00000000
--- a/src/app/features/desk/deskMood.test.ts
+++ /dev/null
@@ -1,59 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { MINDS, resolvePose } from '../../components/message/pose/poses';
-import { MOOD_POSE, deskMood } from './deskMood';
-
-describe('deskMood', () => {
-  it('is neutral with the desk clear when nothing is open', () => {
-    expect(deskMood(0, 0)).toEqual({
-      mood: 'neutral',
-      pose: 'neutral',
-      line: "Desk's clear. I'll wave when something lands.",
-    });
-  });
-  it('is triumph when every open fork is answered', () => {
-    expect(deskMood(3, 3).mood).toBe('triumph');
-    expect(deskMood(1, 1).mood).toBe('triumph');
-  });
-  it('is thinking when none is answered, and says whether it is one fork or several', () => {
-    expect(deskMood(1, 0)).toMatchObject({ mood: 'thinking', line: 'Just one fork on the desk.' });
-    expect(deskMood(4, 0)).toMatchObject({
-      mood: 'thinking',
-      line: '4 forks on the desk. No rush.',
-    });
-  });
-  it('is determined partway, counting what is left', () => {
-    expect(deskMood(5, 2)).toMatchObject({ mood: 'determined', line: '3 to go.' });
-  });
-  it('is happy when the pick is the recommendation', () => {
-    expect(deskMood(2, 0, { type: 'picked', choice: 'B', recommended: 'B' }).mood).toBe('happy');
-  });
-  it('is surprised, and asks for a line on why, when the pick differs', () => {
-    expect(deskMood(2, 0, { type: 'picked', choice: 'A', recommended: 'B' })).toMatchObject({
-      mood: 'surprised',
-      line: expect.stringContaining('A line in the note on why helps'),
-    });
-  });
-  it('is surprised, not happy, when there is no recommendation to match', () => {
-    expect(deskMood(2, 0, { type: 'picked', choice: 'A' }).mood).toBe('surprised');
-  });
-  it('is note when a pick is cleared, saying the note can carry the answer', () => {
-    expect(deskMood(2, 1, { type: 'cleared' })).toMatchObject({
-      mood: 'note',
-      line: expect.stringContaining('note can carry the answer on its own'),
-    });
-  });
-  it('is concerned when a send failed, even with everything answered', () => {
-    expect(deskMood(2, 2, { type: 'sendFailed' }).mood).toBe('concerned');
-  });
-  it('is surprised when a new fork arrives, even on a clear desk', () => {
-    expect(deskMood(0, 0, { type: 'newFork' })).toMatchObject({
-      mood: 'surprised',
-      line: 'New fork on the desk!',
-    });
-  });
-  it('maps every mood to a label every Mind in the catalogue can show', () => {
-    Object.values(MOOD_POSE).forEach((pose) =>
-      MINDS.forEach((mind) => expect(resolvePose(mind, pose)).toBe(pose))
-    );
-  });
-});
diff --git a/src/app/features/desk/deskMood.ts b/src/app/features/desk/deskMood.ts
deleted file mode 100644
index 75d9f23e..00000000
--- a/src/app/features/desk/deskMood.ts
+++ /dev/null
@@ -1,75 +0,0 @@
-/**
- * The booth Persona's reactions, from the original Fork Desk's mood() and choose() rules. A pure function of
- * what is on the desk and the last thing that happened; it is the desk's character, so each rule is tested.
- */
-
-/** The original's nine moods. */
-export type Mood =
-  | 'idle'
-  | 'neutral'
-  | 'thinking'
-  | 'happy'
-  | 'surprised'
-  | 'note'
-  | 'determined'
-  | 'triumph'
-  | 'concerned';
-
-/** What last happened; `none` means nothing since the page opened or the last event wore off. */
-export type DeskEvent =
-  | { type: 'none' }
-  | { type: 'picked'; choice: string; recommended?: string }
-  | { type: 'cleared' }
-  | { type: 'sendFailed' }
-  | { type: 'newFork' };
-
-/**
- * Each mood on the shared cast-art labels (neutral, happy, amused, thinking, annoyed, surprised) that every
- * Mind has, so the booth never asks a Mind for art it lacks.
- */
-export const MOOD_POSE: Record<Mood, string> = {
-  idle: 'neutral',
-  neutral: 'neutral',
-  thinking: 'thinking',
-  happy: 'happy',
-  surprised: 'surprised',
-  note: 'thinking',
-  determined: 'thinking',
-  triumph: 'happy',
-  concerned: 'surprised',
-};
-
-export type DeskMood = { mood: Mood; pose: string; line: string };
-
-const say = (mood: Mood, line: string): DeskMood => ({ mood, pose: MOOD_POSE[mood], line });
-
-export const deskMood = (
-  open: number,
-  answered: number,
-  event: DeskEvent = { type: 'none' }
-): DeskMood => {
-  switch (event.type) {
-    case 'sendFailed':
-      return say('concerned', "That one didn't save. Give it another try in a moment?");
-    case 'newFork':
-      return say('surprised', 'New fork on the desk!');
-    case 'cleared':
-      return say('note', 'Pick cleared. Your note can carry the answer on its own.');
-    case 'picked':
-      return event.recommended !== undefined && event.choice === event.recommended
-        ? say('happy', "That's the one I'd have picked too.")
-        : say('surprised', 'Off-script. A line in the note on why helps the next brief.');
-    default:
-      break;
-  }
-  if (open === 0) return say('neutral', "Desk's clear. I'll wave when something lands.");
-  if (answered >= open)
-    return say('triumph', 'All answered! I will carry these back and admit them.');
-  if (answered === 0) {
-    return say(
-      'thinking',
-      open === 1 ? 'Just one fork on the desk.' : `${open} forks on the desk. No rush.`
-    );
-  }
-  return say('determined', `${open - answered} to go.`);
-};
diff --git a/src/app/features/desk/fixtures.ts b/src/app/features/desk/fixtures.ts
deleted file mode 100644
index e74c37ba..00000000
--- a/src/app/features/desk/fixtures.ts
+++ /dev/null
@@ -1,116 +0,0 @@
-import { DeskAnswer, ForkCard, ForkEntry, ForkList } from './forkContract';
-
-/** A card as the server writes it: every key present. The hash is a stand-in; tests pass `unverified` directly. */
-export const card = (label: string, over: Partial<ForkCard> = {}): ForkCard => ({
-  schemaVersion: 'gamecult.fork.card.v0',
-  fork_id: `c:question:${label}`,
-  title: `Question ${label}`,
-  context: `Context for ${label}.`,
-  options: [
-    { id: 'A', text: 'First way' },
-    { id: 'B', text: 'Second way' },
-    { id: 'C', text: 'Third way' },
-  ],
-  recommendation: 'B',
-  depends: [],
-  leans: null,
-  flag: null,
-  raised_in: null,
-  deciders: ['d1'],
-  status: 'open',
-  ruling: null,
-  ruled_from: [],
-  order: 1,
-  options_hash: `hash-${label}`,
-  ...over,
-});
-
-export const answer = (label: string, n: number, over: Partial<DeskAnswer> = {}): DeskAnswer => ({
-  schemaVersion: 'gamecult.desk_answer.v0',
-  answer_id: `n${n}`,
-  fork_id: `c:question:${label}`,
-  outcome: 'Counted',
-  of: null,
-  retracts: null,
-  code: null,
-  options_hash: `hash-${label}`,
-  choice: 'A',
-  note: null,
-  answered_at: '2026-11-09T10:00:00Z',
-  received_at: '2026-11-09T10:00:01Z',
-  claim_in_future: false,
-  answerer: 'acct-1',
-  authority: 'Member',
-  request_id: `r${n}`,
-  ...over,
-});
-
-export const entry = (
-  label: string,
-  over: Partial<ForkCard> = {},
-  answers: DeskAnswer[] = [],
-  counted: string | null = null
-): ForkEntry => {
-  const c = card(label, over);
-  return {
-    schemaVersion: 'gamecult.fork.entry.v0',
-    card: c,
-    record: {
-      schemaVersion: 'gamecult.fork.record.v0',
-      fork_id: c.fork_id,
-      options_hash: c.options_hash,
-      counted_answer_id: counted,
-      answers,
-    },
-  };
-};
-
-export const list = (forks: ForkEntry[], openCount?: number): ForkList => ({
-  schemaVersion: 'gamecult.fork.list.v0',
-  mind: 'mind',
-  stamp: 's12',
-  open_count: openCount ?? forks.filter((f) => f.card.status === 'open').length,
-  recorded_count: forks.filter((f) => f.card.status === 'closed').length,
-  forks,
-  next_cursor: null,
-});
-
-/** One list per state the desk shows. */
-export const STATES = {
-  empty: list([]),
-  noAnswers: list([entry('plain')]),
-  blocked: list([
-    entry('first', { order: 1 }),
-    entry('second', { order: 2, depends: ['Needs the first one settled'] }),
-  ]),
-  settled: list([
-    entry('done', { status: 'closed', ruling: 'ruling:done-1', ruled_from: ['n1'] }),
-    entry('shut', { status: 'closed' }),
-    entry('live'),
-  ]),
-  answered: list([
-    entry(
-      'plain',
-      {},
-      [
-        answer('plain', 1, { note: 'Because it is first.' }),
-        answer('plain', 2, {
-          outcome: 'Revision',
-          of: 'n1',
-          choice: 'C',
-          note: null,
-          answerer: 'acct-2',
-        }),
-        answer('plain', 3, { outcome: 'Retraction', retracts: 'n2', choice: null }),
-        answer('plain', 4, {
-          outcome: 'Refused',
-          code: 'not_a_decider',
-          choice: 'B',
-          note: 'Let me in.',
-        }),
-        answer('plain', 5, { choice: null, note: 'Either, if measured first.' }),
-      ],
-      'n1'
-    ),
-  ]),
-} satisfies Record<string, ForkList>;
diff --git a/src/app/features/desk/forkContract.ts b/src/app/features/desk/forkContract.ts
deleted file mode 100644
index ce196116..00000000
--- a/src/app/features/desk/forkContract.ts
+++ /dev/null
@@ -1,92 +0,0 @@
-/**
- * The desk's typed view of the documents Bifrost serves for a Mind's desk: CultLib's
- * contracts/cultnet/governance/fork-card.md (gamecult.fork.list.v0 / entry / card / record, and the stored
- * gamecult.desk_answer.v0). Read-only: the page decodes them as served and derives nothing from them (the counted
- * answer is the record's `counted_answer_id`, not the page's opinion), so nothing here has a write shape.
- * Every key is written by the server, nil where absent.
- */
-
-export type ForkOption = { id: string; text: string };
-
-export type ForkCard = {
-  schemaVersion: 'gamecult.fork.card.v0';
-  /** `<campaign>:question:<label>`. */
-  fork_id: string;
-  title: string;
-  context: string;
-  options: ForkOption[];
-  /** An option id; never nil. Never preselected. */
-  recommendation: string;
-  /** Prose lines, each verbatim; a line may read like a reference but is only text. */
-  depends: string[];
-  /** An option id, or nil. Not shown by the desk. */
-  leans: string | null;
-  /** Not shown by the desk. */
-  flag: string | null;
-  raised_in: { kind: string; id: string } | null;
-  deciders: string[];
-  status: 'open' | 'closed';
-  /** The ruling id when a ruling closed the fork; nil when open, and nil on a closed card withdrawn with no ruling. */
-  ruling: string | null;
-  ruled_from: string[];
-  /** The admission ordinal. */
-  order: number;
-  /**
-   * Publisher's hash of the five shown members. The desk recomputes it (optionsHash.ts, pinned to the CultLib
-   * vectors) and withdraws a card whose hash differs.
-   */
-  options_hash: string;
-};
-
-/** One stored answer, told apart by `outcome` (and `code` for a refusal). */
-export type DeskAnswer = {
-  schemaVersion: 'gamecult.desk_answer.v0';
-  /** `n<seq>`. */
-  answer_id: string;
-  fork_id: string;
-  outcome: 'Counted' | 'Revision' | 'Retraction' | 'Refused';
-  /** A Revision's target. */
-  of: string | null;
-  /** A Retraction's target (or a refused retraction's). */
-  retracts: string | null;
-  /** A refusal's code. */
-  code: string | null;
-  options_hash: string;
-  choice: string | null;
-  /** The decider's own words, verbatim; nil for everyone Bifrost does not show notes to. */
-  note: string | null;
-  answered_at: string;
-  received_at: string;
-  claim_in_future: boolean;
-  answerer: string;
-  authority: string;
-  request_id: string;
-};
-
-export type ForkRecord = {
-  schemaVersion: 'gamecult.fork.record.v0';
-  fork_id: string;
-  options_hash: string;
-  /** Derived by the receiver; the page renders it and never recomputes it. */
-  counted_answer_id: string | null;
-  /** In admission order. */
-  answers: DeskAnswer[];
-};
-
-export type ForkEntry = {
-  schemaVersion: 'gamecult.fork.entry.v0';
-  card: ForkCard;
-  record: ForkRecord;
-};
-
-/** What the page holds for one Mind's desk. */
-export type ForkList = {
-  schemaVersion: 'gamecult.fork.list.v0';
-  mind: string;
-  /** `s<N>`: the same stamp is the same state. */
-  stamp: string;
-  open_count: number;
-  recorded_count: number;
-  forks: ForkEntry[];
-  next_cursor: string | null;
-};
diff --git a/src/app/features/desk/index.ts b/src/app/features/desk/index.ts
deleted file mode 100644
index bd82dd3a..00000000
--- a/src/app/features/desk/index.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export { Desk } from './Desk';
-export { DeskEntry } from './DeskEntry';
-export { setDeskSource } from './source';
diff --git a/src/app/features/desk/optionsHash.test.ts b/src/app/features/desk/optionsHash.test.ts
deleted file mode 100644
index 992bd44a..00000000
--- a/src/app/features/desk/optionsHash.test.ts
+++ /dev/null
@@ -1,50 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import vectors from './optionsHashVectors.json';
-import { entry } from './fixtures';
-import { ForkCard } from './forkContract';
-import { canonicalShown, optionsHash, shownOf, unverifiedForks } from './optionsHash';
-
-describe('options_hash against the CultLib vectors', () => {
-  it('has all fifteen vectors', () => {
-    expect(vectors.optionsHash).toHaveLength(15);
-  });
-  vectors.optionsHash.forEach((v) => {
-    it(`${v.name}: canonical bytes and sha256 match`, async () => {
-      expect(canonicalShown(v)).toBe(v.canonical);
-      expect(await optionsHash(v)).toBe(v.sha256);
-    });
-  });
-});
-
-describe('unverifiedForks', () => {
-  const sealed = async (over: Partial<ForkCard> = {}) => {
-    const e = entry('plain', over);
-    return { ...e, card: { ...e.card, options_hash: await optionsHash(shownOf(e.card)) } };
-  };
-  it('passes a card whose hash is the hash of what it shows', async () => {
-    expect(await unverifiedForks([await sealed()])).toEqual(new Set());
-  });
-  it('flags a card whose shown title, context, option, recommendation or depends changed after hashing', async () => {
-    const e = await sealed();
-    const edits: Partial<ForkCard>[] = [
-      { title: 'Other' },
-      { context: 'Other context.' },
-      { options: [...e.card.options].reverse() },
-      { recommendation: 'A' },
-      { depends: ['new line'] },
-    ];
-    await Promise.all(
-      edits.map(async (x) =>
-        expect(
-          await unverifiedForks([{ ...e, card: { ...e.card, ...x } }]),
-          JSON.stringify(Object.keys(x))
-        ).toEqual(new Set([e.card.fork_id]))
-      )
-    );
-  });
-  it('does not read fork_id, status, order, leans or flag, which are not shown members', async () => {
-    const e = await sealed();
-    const card = { ...e.card, fork_id: 'x:question:y', order: 7, leans: 'A', flag: 'f' };
-    expect(await unverifiedForks([{ ...e, card }])).toEqual(new Set());
-  });
-});
diff --git a/src/app/features/desk/optionsHash.ts b/src/app/features/desk/optionsHash.ts
deleted file mode 100644
index f853e0ec..00000000
--- a/src/app/features/desk/optionsHash.ts
+++ /dev/null
@@ -1,51 +0,0 @@
-import { ForkCard, ForkEntry } from './forkContract';
-
-// The hash and its canonical bytes are specified in CultLib contracts/cultnet/governance/fork-card.md
-// ("Options hash", rule owner: Heimdall's binding file 1.2); the vectors in optionsHashVectors.json pin this code to it.
-
-const jstr = (s: string): string => {
-  let out = '"';
-  // eslint-disable-next-line no-restricted-syntax
-  for (const ch of s.normalize('NFC')) {
-    const o = ch.codePointAt(0) as number;
-    const named: Record<number, string> = { 8: '\\b', 9: '\\t', 10: '\\n', 12: '\\f', 13: '\\r' };
-    if (ch === '"') out += '\\"';
-    else if (ch === '\\') out += '\\\\';
-    else if (named[o]) out += named[o];
-    else out += o < 0x20 ? `\\u${o.toString(16).padStart(4, '0')}` : ch;
-  }
-  return `${out}"`;
-};
-
-export type Shown = Pick<ForkCard, 'title' | 'context' | 'options' | 'recommendation' | 'depends'>;
-
-/** The five shown members as RFC 8785 JSON, keys already in sorted order. */
-export const canonicalShown = (c: Shown): string =>
-  `{"context":${jstr(c.context)},"depends":[${c.depends.map(jstr).join(',')}],"options":[${c.options
-    .map((o) => `{"id":${jstr(o.id)},"text":${jstr(o.text)}}`)
-    .join(',')}],"recommendation":${jstr(c.recommendation)},"title":${jstr(c.title)}}`;
-
-export const shownOf = (c: ForkCard): Shown => ({
-  title: c.title,
-  context: c.context,
-  options: c.options,
-  recommendation: c.recommendation,
-  depends: c.depends,
-});
-
-export const optionsHash = async (c: Shown): Promise<string> => {
-  const bytes = new TextEncoder().encode(canonicalShown(c));
-  const digest = await crypto.subtle.digest('SHA-256', bytes);
-  return Array.from(new Uint8Array(digest), (b) => b.toString(16).padStart(2, '0')).join('');
-};
-
-/** Fork ids whose published `options_hash` is not the hash of what the card shows. */
-export const unverifiedForks = async (forks: ForkEntry[]): Promise<Set<string>> => {
-  const bad = new Set<string>();
-  await Promise.all(
-    forks.map(async ({ card }) => {
-      if ((await optionsHash(shownOf(card))) !== card.options_hash) bad.add(card.fork_id);
-    })
-  );
-  return bad;
-};
diff --git a/src/app/features/desk/optionsHashVectors.json b/src/app/features/desk/optionsHashVectors.json
deleted file mode 100644
index 11a3bdfa..00000000
--- a/src/app/features/desk/optionsHashVectors.json
+++ /dev/null
@@ -1,320 +0,0 @@
-{
-  "source": "GameCult/CultLib contracts/cultnet/governance/fork-card-vectors.json, `optionsHash` member only, values unchanged (re-escaped to ASCII so TypeScript parses it), checked equal at CultLib 0c19eddb. Rule: contracts/cultnet/governance/fork-card.md, 'Options hash'.",
-  "optionsHash": [
-    {
-      "name": "heimdall_A_five_members",
-      "heimdall": "A",
-      "title": "Slot mark consent",
-      "context": "Should a slot mark be shared?",
-      "options": [
-        {
-          "id": "yes",
-          "text": "Share it."
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "no",
-      "depends": ["gamecult-chat:question:file-zone-audience"],
-      "canonical": "{\"context\":\"Should a slot mark be shared?\",\"depends\":[\"gamecult-chat:question:file-zone-audience\"],\"options\":[{\"id\":\"yes\",\"text\":\"Share it.\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"no\",\"title\":\"Slot mark consent\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C64206120736C6F74206D61726B206265207368617265643F222C22646570656E6473223A5B2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365225D2C226F7074696F6E73223A5B7B226964223A22796573222C2274657874223A2253686172652069742E227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A22536C6F74206D61726B20636F6E73656E74227D",
-      "sha256": "7d95fc87d532420611fe415c1def27a3447617bb68235f46e3af130aea361c48"
-    },
-    {
-      "name": "heimdall_B_recommendation_changed",
-      "heimdall": "B",
-      "title": "Slot mark consent",
-      "context": "Should a slot mark be shared?",
-      "options": [
-        {
-          "id": "yes",
-          "text": "Share it."
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "yes",
-      "depends": ["gamecult-chat:question:file-zone-audience"],
-      "canonical": "{\"context\":\"Should a slot mark be shared?\",\"depends\":[\"gamecult-chat:question:file-zone-audience\"],\"options\":[{\"id\":\"yes\",\"text\":\"Share it.\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"yes\",\"title\":\"Slot mark consent\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C64206120736C6F74206D61726B206265207368617265643F222C22646570656E6473223A5B2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365225D2C226F7074696F6E73223A5B7B226964223A22796573222C2274657874223A2253686172652069742E227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A22796573222C227469746C65223A22536C6F74206D61726B20636F6E73656E74227D",
-      "sha256": "14b8ffbdb61106dbc06f69f3fc8e2072af7a205d766e4cc040e89733013d54dc"
-    },
-    {
-      "name": "heimdall_C_option_order_changed",
-      "heimdall": "C",
-      "title": "Slot mark consent",
-      "context": "Should a slot mark be shared?",
-      "options": [
-        {
-          "id": "no",
-          "text": "Keep it local."
-        },
-        {
-          "id": "yes",
-          "text": "Share it."
-        }
-      ],
-      "recommendation": "no",
-      "depends": ["gamecult-chat:question:file-zone-audience"],
-      "canonical": "{\"context\":\"Should a slot mark be shared?\",\"depends\":[\"gamecult-chat:question:file-zone-audience\"],\"options\":[{\"id\":\"no\",\"text\":\"Keep it local.\"},{\"id\":\"yes\",\"text\":\"Share it.\"}],\"recommendation\":\"no\",\"title\":\"Slot mark consent\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C64206120736C6F74206D61726B206265207368617265643F222C22646570656E6473223A5B2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365225D2C226F7074696F6E73223A5B7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D2C7B226964223A22796573222C2274657874223A2253686172652069742E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A22536C6F74206D61726B20636F6E73656E74227D",
-      "sha256": "ac67b41539f869f6203ac0908819df046e4328b27795743a919bd4ab390596b5"
-    },
-    {
-      "name": "heimdall_D_nfc_escapes_astral",
-      "heimdall": "D",
-      "title": "Caf\u00e9 \u201cdesk\u201d",
-      "context": "Line one\nLine two \u2014 \ud83d\ude00",
-      "options": [
-        {
-          "id": "a",
-          "text": "x"
-        },
-        {
-          "id": "b",
-          "text": "y"
-        }
-      ],
-      "recommendation": "a",
-      "depends": [],
-      "canonical": "{\"context\":\"Line one\\nLine two \u2014 \ud83d\ude00\",\"depends\":[],\"options\":[{\"id\":\"a\",\"text\":\"x\"},{\"id\":\"b\",\"text\":\"y\"}],\"recommendation\":\"a\",\"title\":\"Caf\u00e9 \u201cdesk\u201d\"}",
-      "canonicalHex": "7B22636F6E74657874223A224C696E65206F6E655C6E4C696E652074776F20E2809420F09F9880222C22646570656E6473223A5B5D2C226F7074696F6E73223A5B7B226964223A2261222C2274657874223A2278227D2C7B226964223A2262222C2274657874223A2279227D5D2C227265636F6D6D656E646174696F6E223A2261222C227469746C65223A22436166C3A920E2809C6465736BE2809D227D",
-      "sha256": "71d5c413478ad06aaa1cbdd9e91c53f0cb4cef1dbd4c51bf3d473bccc6a5a272"
-    },
-    {
-      "name": "heimdall_E_decomposed_equals_D",
-      "heimdall": "E",
-      "title": "Cafe\u0301 \u201cdesk\u201d",
-      "context": "Line one\nLine two \u2014 \ud83d\ude00",
-      "options": [
-        {
-          "id": "a",
-          "text": "x"
-        },
-        {
-          "id": "b",
-          "text": "y"
-        }
-      ],
-      "recommendation": "a",
-      "depends": [],
-      "canonical": "{\"context\":\"Line one\\nLine two \u2014 \ud83d\ude00\",\"depends\":[],\"options\":[{\"id\":\"a\",\"text\":\"x\"},{\"id\":\"b\",\"text\":\"y\"}],\"recommendation\":\"a\",\"title\":\"Caf\u00e9 \u201cdesk\u201d\"}",
-      "canonicalHex": "7B22636F6E74657874223A224C696E65206F6E655C6E4C696E652074776F20E2809420F09F9880222C22646570656E6473223A5B5D2C226F7074696F6E73223A5B7B226964223A2261222C2274657874223A2278227D2C7B226964223A2262222C2274657874223A2279227D5D2C227265636F6D6D656E646174696F6E223A2261222C227469746C65223A22436166C3A920E2809C6465736BE2809D227D",
-      "sha256": "71d5c413478ad06aaa1cbdd9e91c53f0cb4cef1dbd4c51bf3d473bccc6a5a272"
-    },
-    {
-      "name": "heimdall_F_option_id_changed",
-      "heimdall": "F",
-      "title": "Slot mark consent",
-      "context": "Should a slot mark be shared?",
-      "options": [
-        {
-          "id": "share",
-          "text": "Share it."
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "no",
-      "depends": ["gamecult-chat:question:file-zone-audience"],
-      "canonical": "{\"context\":\"Should a slot mark be shared?\",\"depends\":[\"gamecult-chat:question:file-zone-audience\"],\"options\":[{\"id\":\"share\",\"text\":\"Share it.\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"no\",\"title\":\"Slot mark consent\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C64206120736C6F74206D61726B206265207368617265643F222C22646570656E6473223A5B2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365225D2C226F7074696F6E73223A5B7B226964223A227368617265222C2274657874223A2253686172652069742E227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A22536C6F74206D61726B20636F6E73656E74227D",
-      "sha256": "fb53aa3a9f7e74029f755d774064eedd240ab90d8fc64723f97c31b3d2846d40"
-    },
-    {
-      "name": "heimdall_G_depends_emptied",
-      "heimdall": "G",
-      "title": "Slot mark consent",
-      "context": "Should a slot mark be shared?",
-      "options": [
-        {
-          "id": "yes",
-          "text": "Share it."
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "no",
-      "depends": [],
-      "canonical": "{\"context\":\"Should a slot mark be shared?\",\"depends\":[],\"options\":[{\"id\":\"yes\",\"text\":\"Share it.\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"no\",\"title\":\"Slot mark consent\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C64206120736C6F74206D61726B206265207368617265643F222C22646570656E6473223A5B5D2C226F7074696F6E73223A5B7B226964223A22796573222C2274657874223A2253686172652069742E227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A22536C6F74206D61726B20636F6E73656E74227D",
-      "sha256": "f856edce121db4121b5f1af400b1c471ebbfa6579a042aca9a34ae31c15f5c86"
-    },
-    {
-      "name": "option_text_changed",
-      "heimdall": null,
-      "title": "Slot mark consent",
-      "context": "Should a slot mark be shared?",
-      "options": [
-        {
-          "id": "yes",
-          "text": "Share it!"
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "no",
-      "depends": ["gamecult-chat:question:file-zone-audience"],
-      "canonical": "{\"context\":\"Should a slot mark be shared?\",\"depends\":[\"gamecult-chat:question:file-zone-audience\"],\"options\":[{\"id\":\"yes\",\"text\":\"Share it!\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"no\",\"title\":\"Slot mark consent\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C64206120736C6F74206D61726B206265207368617265643F222C22646570656E6473223A5B2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365225D2C226F7074696F6E73223A5B7B226964223A22796573222C2274657874223A22536861726520697421227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A22536C6F74206D61726B20636F6E73656E74227D",
-      "sha256": "9ce0d2770497fdd2d5338e66f9f1ae1741d87301db4c793407c25762929392b6"
-    },
-    {
-      "name": "title_changed",
-      "heimdall": null,
-      "title": "Slot mark consent?",
-      "context": "Should a slot mark be shared?",
-      "options": [
-        {
-          "id": "yes",
-          "text": "Share it."
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "no",
-      "depends": ["gamecult-chat:question:file-zone-audience"],
-      "canonical": "{\"context\":\"Should a slot mark be shared?\",\"depends\":[\"gamecult-chat:question:file-zone-audience\"],\"options\":[{\"id\":\"yes\",\"text\":\"Share it.\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"no\",\"title\":\"Slot mark consent?\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C64206120736C6F74206D61726B206265207368617265643F222C22646570656E6473223A5B2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365225D2C226F7074696F6E73223A5B7B226964223A22796573222C2274657874223A2253686172652069742E227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A22536C6F74206D61726B20636F6E73656E743F227D",
-      "sha256": "30fe0c5bc88bd21d64592a495316c30e80fcee6cacf5c63fd9a818ca5cf87d0f"
-    },
-    {
-      "name": "context_changed",
-      "heimdall": null,
-      "title": "Slot mark consent",
-      "context": "Should slot marks be shared?",
-      "options": [
-        {
-          "id": "yes",
-          "text": "Share it."
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "no",
-      "depends": ["gamecult-chat:question:file-zone-audience"],
-      "canonical": "{\"context\":\"Should slot marks be shared?\",\"depends\":[\"gamecult-chat:question:file-zone-audience\"],\"options\":[{\"id\":\"yes\",\"text\":\"Share it.\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"no\",\"title\":\"Slot mark consent\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C6420736C6F74206D61726B73206265207368617265643F222C22646570656E6473223A5B2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365225D2C226F7074696F6E73223A5B7B226964223A22796573222C2274657874223A2253686172652069742E227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A22536C6F74206D61726B20636F6E73656E74227D",
-      "sha256": "716de65096e34fd89cc92848b667d90f5c27eeb66929da3d340cabb80155e173"
-    },
-    {
-      "name": "depends_order_changed",
-      "heimdall": null,
-      "title": "Slot mark consent",
-      "context": "Should a slot mark be shared?",
-      "options": [
-        {
-          "id": "yes",
-          "text": "Share it."
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "no",
-      "depends": ["gamecult-chat:question:file-zone-audience", "x:question:y"],
-      "canonical": "{\"context\":\"Should a slot mark be shared?\",\"depends\":[\"gamecult-chat:question:file-zone-audience\",\"x:question:y\"],\"options\":[{\"id\":\"yes\",\"text\":\"Share it.\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"no\",\"title\":\"Slot mark consent\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C64206120736C6F74206D61726B206265207368617265643F222C22646570656E6473223A5B2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365222C22783A7175657374696F6E3A79225D2C226F7074696F6E73223A5B7B226964223A22796573222C2274657874223A2253686172652069742E227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A22536C6F74206D61726B20636F6E73656E74227D",
-      "sha256": "fc3f651c6f498385256fc1232d5db31ece9dcc542e391f97245d27bc9e385b3d"
-    },
-    {
-      "name": "depends_order_changed_reversed",
-      "heimdall": null,
-      "title": "Slot mark consent",
-      "context": "Should a slot mark be shared?",
-      "options": [
-        {
-          "id": "yes",
-          "text": "Share it."
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "no",
-      "depends": ["x:question:y", "gamecult-chat:question:file-zone-audience"],
-      "canonical": "{\"context\":\"Should a slot mark be shared?\",\"depends\":[\"x:question:y\",\"gamecult-chat:question:file-zone-audience\"],\"options\":[{\"id\":\"yes\",\"text\":\"Share it.\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"no\",\"title\":\"Slot mark consent\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C64206120736C6F74206D61726B206265207368617265643F222C22646570656E6473223A5B22783A7175657374696F6E3A79222C2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365225D2C226F7074696F6E73223A5B7B226964223A22796573222C2274657874223A2253686172652069742E227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A22536C6F74206D61726B20636F6E73656E74227D",
-      "sha256": "b22642e30f8d68839e3a0df5bc23b83ff50a839fcecf0366a65fa6e3cf873796"
-    },
-    {
-      "name": "hidden_members_do_not_move_it",
-      "heimdall": null,
-      "title": "Slot mark consent",
-      "context": "Should a slot mark be shared?",
-      "options": [
-        {
-          "id": "yes",
-          "text": "Share it."
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "no",
-      "depends": ["gamecult-chat:question:file-zone-audience"],
-      "canonical": "{\"context\":\"Should a slot mark be shared?\",\"depends\":[\"gamecult-chat:question:file-zone-audience\"],\"options\":[{\"id\":\"yes\",\"text\":\"Share it.\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"no\",\"title\":\"Slot mark consent\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C64206120736C6F74206D61726B206265207368617265643F222C22646570656E6473223A5B2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365225D2C226F7074696F6E73223A5B7B226964223A22796573222C2274657874223A2253686172652069742E227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A22536C6F74206D61726B20636F6E73656E74227D",
-      "sha256": "7d95fc87d532420611fe415c1def27a3447617bb68235f46e3af130aea361c48"
-    },
-    {
-      "name": "control_characters_and_markup_are_escaped_minimally",
-      "heimdall": null,
-      "title": "q \" b \\ t \t n \n bell \u0007 del \u007f",
-      "context": "</script> \u2028 &",
-      "options": [
-        {
-          "id": "yes",
-          "text": "Share it."
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "no",
-      "depends": ["gamecult-chat:question:file-zone-audience"],
-      "canonical": "{\"context\":\"</script> \u2028 &\",\"depends\":[\"gamecult-chat:question:file-zone-audience\"],\"options\":[{\"id\":\"yes\",\"text\":\"Share it.\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"no\",\"title\":\"q \\\" b \\\\ t \\t n \\n bell \\u0007 del \u007f\"}",
-      "canonicalHex": "7B22636F6E74657874223A223C2F7363726970743E20E280A82026222C22646570656E6473223A5B2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365225D2C226F7074696F6E73223A5B7B226964223A22796573222C2274657874223A2253686172652069742E227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A2271205C222062205C5C2074205C74206E205C6E2062656C6C205C75303030372064656C207F227D",
-      "sha256": "f2d5a09513ce728129f6ca13f7123aa75b2bb77541b1de8946f39239634b40fe"
-    },
-    {
-      "name": "astral_option_id_and_text",
-      "heimdall": null,
-      "title": "Slot mark consent",
-      "context": "Should a slot mark be shared?",
-      "options": [
-        {
-          "id": "\ud83d\ude00",
-          "text": "\ud834\udd1e"
-        },
-        {
-          "id": "no",
-          "text": "Keep it local."
-        }
-      ],
-      "recommendation": "no",
-      "depends": ["gamecult-chat:question:file-zone-audience"],
-      "canonical": "{\"context\":\"Should a slot mark be shared?\",\"depends\":[\"gamecult-chat:question:file-zone-audience\"],\"options\":[{\"id\":\"\ud83d\ude00\",\"text\":\"\ud834\udd1e\"},{\"id\":\"no\",\"text\":\"Keep it local.\"}],\"recommendation\":\"no\",\"title\":\"Slot mark consent\"}",
-      "canonicalHex": "7B22636F6E74657874223A2253686F756C64206120736C6F74206D61726B206265207368617265643F222C22646570656E6473223A5B2267616D6563756C742D636861743A7175657374696F6E3A66696C652D7A6F6E652D61756469656E6365225D2C226F7074696F6E73223A5B7B226964223A22F09F9880222C2274657874223A22F09D849E227D2C7B226964223A226E6F222C2274657874223A224B656570206974206C6F63616C2E227D5D2C227265636F6D6D656E646174696F6E223A226E6F222C227469746C65223A22536C6F74206D61726B20636F6E73656E74227D",
-      "sha256": "836fbfce16127132bae100aa773d328a85ad08d241ae9bf47ea7f84766762cac"
-    }
-  ]
-}
diff --git a/src/app/features/desk/source.ts b/src/app/features/desk/source.ts
deleted file mode 100644
index 534a26bb..00000000
--- a/src/app/features/desk/source.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-import { ForkList } from './forkContract';
-
-type DeskSource = (mind: string) => ForkList | undefined;
-
-// Slice 1 reads no network. The preview demo installs seeded forks here; slice 2 replaces this with
-// Bifrost's list reader, which is why the page asks a function and not a fixture.
-let source: DeskSource = () => undefined;
-
-export const setDeskSource = (next: DeskSource) => {
-  source = next;
-};
-
-export const deskFor = (mind: string): ForkList | undefined => source(mind);
diff --git a/src/app/features/estate/EstateNavigator.tsx b/src/app/features/estate/EstateNavigator.tsx
index 27fcfbad..56b554fa 100644
--- a/src/app/features/estate/EstateNavigator.tsx
+++ b/src/app/features/estate/EstateNavigator.tsx
@@ -42,7 +42,6 @@ import { EstateGroup, EstateRoom, EstateTier, splitGroups } from './buildEstate'
 import { activateEstateRoom, awaitMyJoin } from './joinEstateRoom';
 import { useEstate, useEstateRootId } from './useEstate';
 import * as css from './EstateNavigator.css';
-import { DeskEntry } from '../desk';
 import { SkyStateControl } from '../scene/SkyStateControl';
 
 /** How long a tap waits for the client store to hold the room it just joined. */
@@ -136,11 +135,9 @@ type CollapsibleProps = {
   categoryId: string;
   label: string;
   rooms: EstateRoom[];
-  /** Sits in the header beside the label, so a collapsed section still shows it. */
-  trailing?: ReactNode;
   children: ReactNode;
 };
-function Collapsible({ categoryId, label, rooms, trailing, children }: CollapsibleProps) {
+function Collapsible({ categoryId, label, rooms, children }: CollapsibleProps) {
   const mobile = useScreenSizeContext() === ScreenSize.Mobile;
   const selectedRoomId = useSelectedRoom();
   const roomToUnread = useAtomValue(roomToUnreadAtom);
@@ -164,7 +161,6 @@ function Collapsible({ categoryId, label, rooms, trailing, children }: Collapsib
         <RoomNavCategoryButton closed={closed} onClick={handleClick}>
           {label}
         </RoomNavCategoryButton>
-        {trailing}
       </NavCategoryHeader>
       {!closed && children}
     </NavCategory>
@@ -173,12 +169,7 @@ function Collapsible({ categoryId, label, rooms, trailing, children }: Collapsib
 
 function GroupSection({ tierId, group }: { tierId: string; group: EstateGroup }) {
   return (
-    <Collapsible
-      categoryId={`${tierId}|${group.mind}`}
-      label={group.label}
-      rooms={group.rooms}
-      trailing={<DeskEntry mind={group.mind} />}
-    >
+    <Collapsible categoryId={`${tierId}|${group.mind}`} label={group.label} rooms={group.rooms}>
       {group.rooms.map((r) => (
         <EstateRow key={r.roomId} room={r} />
       ))}
diff --git a/src/app/features/estate/joinPath.lint.test.ts b/src/app/features/estate/joinPath.lint.test.ts
deleted file mode 100644
index 82b2a476..00000000
--- a/src/app/features/estate/joinPath.lint.test.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-// @vitest-environment node
-import { describe, expect, it } from 'vitest';
-import { ESLint } from 'eslint';
-
-// The product rule is one join path: a join is joinEstateRoom, which files the DM before it sends the join.
-// This pins that the lint config enforces it, not just that the code happens to comply today.
-const lint = async (filePath: string, code: string) => {
-  const eslint = new ESLint({ cwd: process.cwd(), useEslintrc: true });
-  const [result] = await eslint.lintText(code, { filePath });
-  return result.messages.filter((m) => m.ruleId === 'no-restricted-syntax');
-};
-const JOIN = 'export const f = (mx: { joinRoom: (id: string) => void }) => mx.joinRoom("!a:b");\n';
-
-describe('the one join path is enforced by lint', () => {
-  it('rejects a joinRoom call anywhere but joinEstateRoom.ts', async () => {
-    const found = await lint('src/app/features/estate/EstateNavigator.tsx', JOIN);
-    expect(found).toHaveLength(1);
-    expect(found[0].message).toContain('joinEstateRoom');
-  });
-
-  it('allows the call inside joinEstateRoom.ts itself', async () => {
-    expect(await lint('src/app/features/estate/joinEstateRoom.ts', JOIN)).toHaveLength(0);
-  });
-
-  it('still applies the Airbnb syntax bans in the same files', async () => {
-    const found = await lint(
-      'src/app/foo.ts',
-      'export const g = (o: object) => { for (const k in o) { return k; } return 0; };\n'
-    );
-    expect(found.some((m) => m.message.includes('for..in'))).toBe(true);
-  });
-});
diff --git a/src/app/features/room/RoomTrainingLine.tsx b/src/app/features/room/RoomTrainingLine.tsx
index fd410979..8f09fdcf 100644
--- a/src/app/features/room/RoomTrainingLine.tsx
+++ b/src/app/features/room/RoomTrainingLine.tsx
@@ -3,8 +3,6 @@ import { Room } from 'matrix-js-sdk';
 import React from 'react';
 import { useStateEvent } from '../../hooks/useStateEvent';
 import { useClientConfig } from '../../hooks/useClientConfig';
-import { useSkyInk } from '../../hooks/useTheme';
-import { noticeInk } from '../scene/skyInk';
 import {
   ROOM_NOTICE_EVENT_TYPE,
   parseRoomNotice,
@@ -16,16 +14,12 @@ import {
 export function RoomTrainingLine({ room }: { room: Room }) {
   const event = useStateEvent(room, ROOM_NOTICE_EVENT_TYPE);
   const { previewDemo } = useClientConfig();
-  const skyInk = useSkyInk();
   const line = roomTrainingLine(parseRoomNotice(event?.getContent()), previewDemo);
   if (!line) return null;
   return (
     <Text
       size="T200"
-      style={{
-        padding: `${config.space.S100} 0`,
-        color: (skyInk && noticeInk(skyInk)) ?? color.SurfaceVariant.OnContainer,
-      }}
+      style={{ padding: `${config.space.S100} 0`, color: color.SurfaceVariant.OnContainer }}
     >
       {line}
     </Text>
diff --git a/src/app/features/room/RoomView.tsx b/src/app/features/room/RoomView.tsx
index 0137fd95..3fbd81fa 100644
--- a/src/app/features/room/RoomView.tsx
+++ b/src/app/features/room/RoomView.tsx
@@ -1,4 +1,4 @@
-import React, { useCallback, useRef, useState } from 'react';
+import React, { useCallback, useRef } from 'react';
 import { Box, Text, config } from 'folds';
 import { EventType } from 'matrix-js-sdk';
 import { ReactEditor } from 'slate-react';
@@ -23,10 +23,6 @@ import { useSetting } from '../../state/hooks/settings';
 import { useRoomPermissions } from '../../hooks/useRoomPermissions';
 import { useRoomCreators } from '../../hooks/useRoomCreators';
 import { useRoom } from '../../hooks/useRoom';
-import { AlbumView } from '../albums/AlbumView';
-import * as albumCss from '../albums/AlbumView.css';
-import { useIsFileZone } from '../albums/useAlbums';
-import { ZoneView, zoneView } from '../albums/zoneView';
 
 const FN_KEYS_REGEX = /^F\d+$/;
 const shouldFocusMessageField = (evt: KeyboardEvent): boolean => {
@@ -68,12 +64,6 @@ export function RoomView({ eventId }: { eventId?: string }) {
   const room = useRoom();
   const { roomId } = room;
   const editor = useEditor();
-  const isZone = useIsFileZone(room);
-  // A zone shows its albums; the timeline stays one tap away, and an event deep link opens it.
-  const [choice, setChoice] = useState<{ roomId: string; view: ZoneView }>();
-  const fileZone =
-    isZone &&
-    zoneView(choice && choice.roomId === roomId ? choice.view : undefined, eventId) === 'albums';
 
   const mx = useMatrixClient();
 
@@ -88,7 +78,7 @@ export function RoomView({ eventId }: { eventId?: string }) {
     window,
     useCallback(
       (evt) => {
-        if (fileZone || editableActiveElement()) return;
+        if (editableActiveElement()) return;
         const portalContainer = document.getElementById('portalContainer');
         if (portalContainer && portalContainer.children.length > 0) {
           return;
@@ -97,35 +87,13 @@ export function RoomView({ eventId }: { eventId?: string }) {
           ReactEditor.focus(editor);
         }
       },
-      [editor, fileZone]
+      [editor]
     )
   );
 
-  // The file zone is its own view: no timeline, no composer.
-  if (fileZone) {
-    return (
-      <Page ref={roomViewRef}>
-        <AlbumView
-          key={roomId}
-          room={room}
-          onTimeline={() => setChoice({ roomId, view: 'timeline' })}
-        />
-      </Page>
-    );
-  }
-
   return (
     <Page ref={roomViewRef}>
       <Box grow="Yes" direction="Column">
-        {isZone && !eventId && (
-          <button
-            type="button"
-            className={albumCss.Back}
-            onClick={() => setChoice({ roomId, view: 'albums' })}
-          >
-            <Text size="B400">‹ Albums</Text>
-          </button>
-        )}
         <RoomTimeline
           key={roomId}
           room={room}
diff --git a/src/app/features/room/RoomViewHeader.css.ts b/src/app/features/room/RoomViewHeader.css.ts
index cff21a99..19e1afea 100644
--- a/src/app/features/room/RoomViewHeader.css.ts
+++ b/src/app/features/room/RoomViewHeader.css.ts
@@ -1,18 +1,7 @@
 import { style } from '@vanilla-extract/css';
 import { config } from 'folds';
-import { MOBILE_BREAKPOINT } from '../../hooks/useScreenSize';
 
-// Phone tap target: the topic is an 18 px line under the room name; its button grows 9 px up and 17 px down
-// (44 px to tap; more below because the name is above) and the negative margin keeps the layout where it was.
 export const HeaderTopic = style({
-  '@media': {
-    [`screen and (max-width: ${MOBILE_BREAKPOINT}px)`]: {
-      paddingTop: 9,
-      paddingBottom: 17,
-      marginTop: -9,
-      marginBottom: -17,
-    },
-  },
   ':hover': {
     cursor: 'pointer',
     opacity: config.opacity.P500,
diff --git a/src/app/features/room/message/Message.tsx b/src/app/features/room/message/Message.tsx
index 281d4d78..62bb4dae 100644
--- a/src/app/features/room/message/Message.tsx
+++ b/src/app/features/room/message/Message.tsx
@@ -1168,6 +1168,7 @@ export const Message = as<'div', MessageProps>(
           <BubbleLayout
             own={own}
             pose={mind ? poseJSX : undefined}
+            alt={poseAlt}
             enterDelay={enterDelay}
             before={avatarJSX}
             header={headerJSX}
diff --git a/src/app/features/scene/README.md b/src/app/features/scene/README.md
index 957f1a42..fa7565b0 100644
--- a/src/app/features/scene/README.md
+++ b/src/app/features/scene/README.md
@@ -4,22 +4,13 @@
 config says `backgroundScene.style: 'raymarch'`; the tier flag still defaults to `off`, and null still
 means "keep the CSS ground". Everything below this section describes the opt-in ray-march scene.
 
-- `ridge/Ridge.ts` `createRidgeScene({ canvas, tier, probe?, onProbe?, onBake?, sky? })` returns `{ login, dispose }` or
-  null (tier `off`, no 2D context). Each of four ridge layers is a function of world-x (`ridge/ridgeWorld.ts` `profile`:
-  ridged multifractal value noise, each octave folded at its crest and weighted by the previous one, domain-warped; one
-  function, a parameter row per layer; nothing repeats). World-x is baked in chunks (1.2 viewport widths, integer pixels)
-  onto plain 2D canvases over a baked sky gradient on the host canvas. Per layer a track holds three chunk canvases: two
-  the window can reach and one ahead. The first view bakes only the first chunk of each layer; the others are baked in
-  tasks of about 6 ms (`setTimeout`; a chunk is baked, put on a canvas with its in-scatter, and blurred in column bands, each sized from the last band's time). Per frame the only motion is the
-  compositor sliding the track with a CSS transform (a Web Animation of `translate3d`, one chunk long, `fill: forwards`,
-  150-420 s per viewport width, farther is slower); when it finishes the chunks move one slot left and the track restarts
-  at 0 in the same task (no jump), and the canvas that left is baked with the next stretch of world. A second animation
-  sways the whole rig (up to 5% of the width sideways, 3% of the height down, 150 s loop): the slow yaw and pitch.
-  No script runs per frame. The host canvas and the layers' parent must be positioned and the canvas should fill the parent.
-- `ridge/ridgeBake.ts` is the pixel function (pure, no DOM): per column the crest's slope gives a normal, lit against the
-  sun (`sunDirection`: x = 0.9 sin(2 pi \* `sunAzimuth`), so the sun is toward +x for azimuth 0 to 0.5, strongest at 0.25, toward -x for 0.5 to 1; with no `sunAzimuth` the face lighting falls back to 0.3 and the in-scatter is off); the face under it has a light-to-haze gradient, erosion
-  streaks (a folded noise at gully width, darker with steepness) and a lit rim on the crest. Contrast scales with
-  `transmittance`; the base colour, haze and blur are the aerial perspective below, not redone.
+- `ridge/Ridge.ts` `createRidgeScene({ canvas, tier, probe?, onProbe?, sky? })` returns `{ login, dispose }` or
+  null (tier `off`, no 2D context). Four ridge layers are generated once on the CPU from CultMath's
+  value-noise fbm (`ridge/noise.ts`, a clean-room port, periodic so the drift loops), each painted once to a plain
+  2D canvas of integer size (two periods wide; DPR 2 or more paints at 2x, otherwise 1x; no resampling between
+  layers) over a baked sky gradient on the host canvas. Per frame the only motion is the browser sliding each layer with a
+  CSS transform (a Web Animation of `translate3d`, 150-420 s per period, farther is slower); no script runs per frame.
+  The host canvas and the layers' parent must be positioned and the canvas should fill the parent.
 - Paused when the tab is hidden; under `prefers-reduced-motion` the layers are painted but never played.
   `tier: 'still'` flattens sky and layers into the host canvas at once and leaves no extra elements.
 - Cadence guard: for the first 2 s after start (after 5 warm-up frames) rAF intervals are sampled; if their p95 is over
@@ -32,9 +23,8 @@ means "keep the CSS ground". Everything below this section describes the opt-in
   in-scatter). Layer distance d = 1 - depth; transmittance T = exp(-1.6 d) (0.24 / 0.37 / 0.58 / 1.00 far to near); colour is
   `T * ground + (1 - T) * haze`, then chroma drops by `0.5 (1 - T)`; the edge is blurred up to 2 px (canvas pixels at DPR 1,
   via the 2D `filter`, skipped where unsupported, e.g. Safari); a faint warm in-scatter (at most 0.16 alpha) peaks at the
-  sun's azimuth in world-x (two incommensurate cosines, so not periodic). Nothing runs per frame. The in-scatter lobe is
-  painted into each chunk, so it drifts with the layer rather than staying fixed under the sun; that is a known
-  approximation until the sun is a real, fixed light.
+  sun's azimuth. Nothing runs per frame. The in-scatter lobe is painted into each layer, so it drifts with the layer
+  rather than staying fixed under the sun; that is a known approximation until the sun is a real, fixed light.
 - `harness/scene/bundle.cjs <out> ridge` builds a standalone page (`?tier=`, `?probe=1`).
 - Not yet measured on a phone: see the PR description.
 
diff --git a/src/app/features/scene/ridge/Ridge.test.ts b/src/app/features/scene/ridge/Ridge.test.ts
index 864491f1..adee2717 100644
--- a/src/app/features/scene/ridge/Ridge.test.ts
+++ b/src/app/features/scene/ridge/Ridge.test.ts
@@ -1,10 +1,10 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 import { createRidgeScene } from './Ridge';
-import { bakeSlice, BakeParams, layerPaint } from './ridgeBake';
-import { valueNoise, hash2 } from './noise';
+import { fbmPeriodic, valueNoisePeriodic, hash2 } from './noise';
 import { FrameSampler, frameStats, SLOW_P95_MS, WARMUP_FRAMES, WINDOW_MS } from './probe';
 import {
   AERIAL,
+  FBM,
   LAYERS,
   edgeBlur,
   hazeColour,
@@ -23,37 +23,58 @@ describe('noise', () => {
   it('is deterministic and in [0, 1)', () => {
     expect(hash2(3, 5)).toBe(hash2(3, 5));
     for (let i = 0; i < 200; i += 1) {
-      const v = valueNoise(i * 0.37 - 20, 2);
+      const v = valueNoisePeriodic(i * 0.37, 2, 7);
       expect(v).toBeGreaterThanOrEqual(0);
       expect(v).toBeLessThan(1);
-      expect(valueNoise(i * 0.37 - 20, 2)).toBe(v);
+    }
+  });
+
+  it('wraps: the lattice repeats every `period` cells', () => {
+    for (const x of [0, 0.4, 3.9, 6.99]) {
+      expect(valueNoisePeriodic(x + 7, 4, 7)).toBeCloseTo(valueNoisePeriodic(x, 4, 7), 12);
     }
   });
 
   it('different rows are different profiles', () => {
-    expect(valueNoise(1.5, 0)).not.toBeCloseTo(valueNoise(1.5, 1), 3);
+    expect(valueNoisePeriodic(1.5, 0, 9)).not.toBeCloseTo(valueNoisePeriodic(1.5, 1, 9), 3);
   });
 });
 
 describe('ridge profile', () => {
-  it('stays in [0, 1] for any world-x, negative and far included, and layers differ', () => {
+  it('every layer is periodic in t, so a drift of one period loops seamlessly', () => {
     for (const spec of LAYERS) {
-      for (let i = -300; i < 300; i += 7) {
-        for (const off of [0, 1234.5, 98765.25]) {
-          const p = profile(spec, i / 50 + off);
-          expect(p).toBeGreaterThanOrEqual(0);
-          expect(p).toBeLessThanOrEqual(1);
-        }
+      for (const t of [0, 0.13, 0.5, 0.97]) {
+        expect(Number.isFinite(profile(spec, t))).toBe(true);
+      }
+      // the end of one period meets the start of the next
+      expect(profile(spec, 1 - 1e-9)).toBeCloseTo(profile(spec, 0), 3);
+    }
+  });
+
+  it('every octave count is an integer lattice, which periodicity needs', () => {
+    for (const spec of LAYERS) {
+      for (let k = 0; k < FBM.octaves; k += 1) {
+        expect(Number.isInteger(spec.baseCells * FBM.lacunarity ** k)).toBe(true);
+      }
+    }
+  });
+
+  it('stays in [0, 1] and layers differ', () => {
+    for (const spec of LAYERS) {
+      for (let i = 0; i < 100; i += 1) {
+        const p = profile(spec, i / 100);
+        expect(p).toBeGreaterThanOrEqual(0);
+        expect(p).toBeLessThanOrEqual(1);
       }
     }
     expect(profile(LAYERS[0], 0.3)).not.toBeCloseTo(profile(LAYERS[1], 0.3), 3);
   });
 
-  it('ridge tops lie inside the layer band', () => {
+  it('ridge tops lie inside the layer band and rise with farther base', () => {
     const size = layerSize(400, 800, 1);
     for (const spec of LAYERS) {
-      for (let x = -500; x < 5 * size.period; x += 17) {
-        const y = ridgeY(spec, x / size.period, size.height, 800);
+      for (let x = 0; x < size.period; x += 17) {
+        const y = ridgeY(spec, x, size.period, size.height, 800);
         expect(y).toBeGreaterThanOrEqual(0);
         expect(y).toBeLessThanOrEqual(size.height);
       }
@@ -74,9 +95,9 @@ describe('ridge profile', () => {
     ] as const) {
       const z = layerSize(w, h, s);
       expect(
-        Number.isInteger(z.period) && Number.isInteger(z.chunk) && Number.isInteger(z.height)
+        Number.isInteger(z.period) && Number.isInteger(z.width) && Number.isInteger(z.height)
       ).toBe(true);
-      expect(z.chunk).toBeGreaterThan(z.period);
+      expect(z.width).toBe(2 * z.period);
     }
   });
 });
@@ -126,16 +147,14 @@ describe('aerial perspective', () => {
     expect(edgeBlur(far)).toBeLessThanOrEqual(AERIAL.blurPx);
   });
 
-  it('in-scatter is faint, grows with distance, is off without a sun, and never repeats', () => {
+  it('in-scatter peaks at the sun azimuth, is periodic, faint, grows with distance, and is off without a sun', () => {
     const az = 0.3;
     const s = { ...sky, sunAzimuth: az };
-    const lobe = (t: number) => scatterAlpha(far, s, t);
-    expect(lobe(az * 1.9)).toBeGreaterThan(lobe(az * 1.9 + 0.95));
-    for (const period of [1, 1.9, 3.8, 5.7, 19])
-      expect(Math.abs(lobe(0.7 + period) - lobe(0.7))).toBeGreaterThan(1e-4);
-    expect(lobe(az * 1.9)).toBeLessThanOrEqual(AERIAL.scatter);
+    expect(scatterAlpha(far, s, az)).toBeGreaterThan(scatterAlpha(far, s, az + 0.5));
+    expect(scatterAlpha(far, s, 0)).toBeCloseTo(scatterAlpha(far, s, 1), 12);
+    expect(scatterAlpha(far, s, az)).toBeLessThanOrEqual(AERIAL.scatter);
     expect(scatterAlpha(near, s, az)).toBe(0);
-    expect(scatterAlpha(LAYERS[1], s, az * 1.9)).toBeLessThan(scatterAlpha(far, s, az * 1.9));
+    expect(scatterAlpha(LAYERS[1], s, az)).toBeLessThan(scatterAlpha(far, s, az));
     expect(scatterAlpha(far, { ...sky, sunAzimuth: undefined }, az)).toBe(0);
   });
 });
@@ -218,21 +237,8 @@ function fakeEl(tag = 'div') {
       this.children.push(c);
       return c;
     },
-    animate: vi.fn((keyframes: any[], options: any) => {
-      const a: any = {
-        currentTime: 0,
-        keyframes,
-        options,
-        onfinish: null,
-        play: vi.fn(),
-        pause: vi.fn(),
-        cancel: vi.fn(),
-        /** The animation reaches its end: what the compositor's finish event does. */
-        finish() {
-          a.currentTime = options.duration;
-          a.onfinish?.();
-        },
-      };
+    animate: vi.fn(() => {
+      const a = { currentTime: 0, play: vi.fn(), pause: vi.fn(), cancel: vi.fn() };
       el.anims.push(a);
       return a;
     }),
@@ -250,10 +256,6 @@ const DAY: SkyColours = {
   sunAzimuth: 0.3,
 };
 const draws: string[] = [];
-/** Every ImageData put on any canvas, in order. */
-const puts: any[] = [];
-/** For every drawImage: the source canvas's width as it was at the moment of the draw. */
-const drawnWidths: number[] = [];
 function ctx(withFilter = false) {
   const c: any = {
     globalCompositeOperation: 'source-over',
@@ -261,16 +263,6 @@ function ctx(withFilter = false) {
     fillRect() {
       draws.push(c.globalCompositeOperation === 'source-atop' ? 'scatter' : 'sky');
     },
-    save() {},
-    restore() {},
-    rect() {},
-    clip() {},
-    createImageData: (w: number, h: number) => ({
-      data: new Uint8ClampedArray(w * h * 4),
-      width: w,
-      height: h,
-    }),
-    putImageData: (img: any) => puts.push(img),
     beginPath() {},
     moveTo() {},
     lineTo() {},
@@ -288,10 +280,7 @@ function ctx(withFilter = false) {
       if (c.arcing) c.arcing = false;
       else draws.push('fill');
     },
-    drawImage: (src: any) => {
-      drawnWidths.push(src.width);
-      draws.push('flatten');
-    },
+    drawImage: () => draws.push('flatten'),
     set fillStyle(_v: unknown) {},
   };
   if (withFilter) c.filter = 'none';
@@ -306,8 +295,6 @@ let search: string;
 beforeEach(() => {
   rafQueue = [];
   draws.length = 0;
-  puts.length = 0;
-  drawnWidths.length = 0;
   search = '';
   motion = { matches: false, addEventListener: vi.fn(), removeEventListener: vi.fn() };
   doc = Object.assign(new EventTarget(), {
@@ -343,11 +330,6 @@ function host() {
   parent.appendChild(canvas);
   return { parent, canvas };
 }
-/** The rig holds one track per layer, farthest first; each track holds three chunk canvases. */
-const rigOf = (parent: any) => parent.children.find((c: any) => c.tag === 'div');
-const tracksOf = (parent: any): any[] => rigOf(parent).children;
-const animsOf = (parent: any): any[] =>
-  [rigOf(parent), ...tracksOf(parent)].flatMap((e: any) => e.anims);
 const runFrames = (dt: number, n: number, from = 0) => {
   let t = from;
   for (let i = 0; i < n && rafQueue.length; i += 1) {
@@ -371,25 +353,19 @@ describe('createRidgeScene', () => {
     expect(createRidgeScene({ canvas, tier: 'full', sky: DAY })).toBeNull();
   });
 
-  it('bakes the sky once, and per layer only the first chunk before the first frame, at integer sizes, farthest first', () => {
+  it('bakes the sky once and paints four layers at integer sizes, farthest first', () => {
     const { parent, canvas } = host();
-    const baked: any[] = [];
-    const s = createRidgeScene({ canvas, tier: 'full', sky: DAY, onBake: (b) => baked.push(b) })!;
+    const s = createRidgeScene({ canvas, tier: 'full', sky: DAY })!;
     expect(s).not.toBeNull();
-    const tracks = tracksOf(parent);
-    expect(tracks).toHaveLength(LAYERS.length);
-    tracks.forEach((t: any) => {
-      expect(t.children).toHaveLength(3);
-      expect(t.animate).toHaveBeenCalledTimes(1);
-      t.children.forEach((c: any) => {
-        expect(Number.isInteger(c.width) && Number.isInteger(c.height)).toBe(true);
-        expect(c.width).toBe(layerSize(400, 800, 2).chunk);
-      });
+    const layers = parent.children.slice(1);
+    expect(layers).toHaveLength(LAYERS.length);
+    layers.forEach((l: any) => {
+      expect(Number.isInteger(l.width) && Number.isInteger(l.height)).toBe(true);
+      expect(l.width).toBe(canvas.width * 2); // DPR 2: layer is two periods wide
+      expect(l.animate).toHaveBeenCalledTimes(1);
     });
-    expect(baked.map((b) => [b.layer, b.chunk, b.first])).toEqual(
-      LAYERS.map((l) => [l.index, 0, true])
-    );
     expect(draws.filter((d) => d === 'sky')).toHaveLength(1);
+    expect(draws.filter((d) => d === 'fill')).toHaveLength(LAYERS.length);
     s.dispose();
   });
 
@@ -427,9 +403,8 @@ describe('createRidgeScene', () => {
     motion.matches = true;
     const { canvas } = host();
     const s = createRidgeScene({ canvas, tier: 'full', sky: DAY })!;
-    const anims = animsOf(canvas.parentElement);
-    expect(anims.length).toBe(LAYERS.length + 1); // one drift per layer and the sway
-    expect(anims.every((a: any) => a.pause.mock.calls.length > 0)).toBe(true);
+    const anims = canvas.anims.concat(...canvas.parentElement.children.map((c: any) => c.anims));
+    expect(anims.length).toBe(LAYERS.length);
     anims.forEach((a: any) => expect(a.play).not.toHaveBeenCalled());
     expect(rafQueue).toHaveLength(0);
     s.dispose();
@@ -438,7 +413,7 @@ describe('createRidgeScene', () => {
   it('pauses the drift when the tab is hidden and resumes when it is visible', () => {
     const { parent, canvas } = host();
     const s = createRidgeScene({ canvas, tier: 'full', sky: DAY })!;
-    const anims = animsOf(parent);
+    const anims = parent.children.slice(1).flatMap((l: any) => l.anims);
     anims.forEach((a: any) => a.pause.mockClear());
     doc.visibilityState = 'hidden';
     doc.dispatchEvent(new Event('visibilitychange'));
@@ -467,7 +442,7 @@ describe('createRidgeScene', () => {
     const { parent, canvas } = host();
     const before = parent.children.length;
     const s = createRidgeScene({ canvas, tier: 'full', sky: DAY })!;
-    expect(parent.children.length).toBe(before + 1); // the rig
+    expect(parent.children.length).toBe(before + LAYERS.length);
     runFrames(16.7, 300);
     expect(rafQueue.length).toBe(0);
     s.dispose();
@@ -491,7 +466,7 @@ describe('createRidgeScene', () => {
     (window as any).innerHeight = 800;
     window.dispatchEvent(new Event('resize'));
     await new Promise((r) => setTimeout(r, 300));
-    expect(tracksOf(parent)).toHaveLength(LAYERS.length);
+    expect(parent.children.slice(1)).toHaveLength(LAYERS.length);
     expect(draws.filter((d) => d === 'sky')).toHaveLength(1);
     s!.dispose();
     expect(parent.children).toEqual([canvas]);
@@ -500,7 +475,7 @@ describe('createRidgeScene', () => {
   it('dispose cancels the loop, the animations and the layers', () => {
     const { parent, canvas } = host();
     const s = createRidgeScene({ canvas, tier: 'full', sky: DAY })!;
-    const anims = animsOf(parent);
+    const anims = parent.children.slice(1).flatMap((l: any) => l.anims);
     s.dispose();
     anims.forEach((a: any) => expect(a.cancel).toHaveBeenCalled());
     expect(parent.children).toEqual([canvas]);
@@ -526,6 +501,16 @@ describe('the door', () => {
   });
 });
 
+describe('fbm', () => {
+  it('is normalised into [0, 1]', () => {
+    for (let i = 0; i < 100; i += 1) {
+      const v = fbmPeriodic(i / 100, 0, 3, FBM);
+      expect(v).toBeGreaterThanOrEqual(0);
+      expect(v).toBeLessThanOrEqual(1);
+    }
+  });
+});
+
 describe('aerial perspective in the scene', () => {
   it('is baked once: one scatter fill per hazy layer, none per frame, the nearest layer has none', () => {
     const { canvas } = host();
@@ -548,7 +533,7 @@ describe('aerial perspective in the scene', () => {
     s.dispose();
   });
 
-  it('softens with the canvas filter where it exists, blur scaled by DPR, from pixels baked past the chunk edges', () => {
+  it('softens with the canvas filter where it exists, blur scaled by DPR, tiled so the wrap does not fade', () => {
     const { parent, canvas } = host();
     const filters: string[] = [];
     const orig = (document as any).createElement;
@@ -572,7 +557,7 @@ describe('aerial perspective in the scene', () => {
     const blurs = filters.filter((f) => f !== 'none');
     expect(blurs).toHaveLength(LAYERS.length - 1); // nearest is sharp
     expect(blurs[0]).toBe(`blur(${edgeBlur(LAYERS[0]) * 2}px)`); // DPR 2
-    expect(parent.children).toHaveLength(2); // sky canvas and the rig
+    expect(parent.children).toHaveLength(1 + LAYERS.length);
     s.dispose();
   });
 
@@ -606,8 +591,9 @@ describe('the starfield in the scene', () => {
     const s = createRidgeScene({ canvas, tier: 'full', sky: night })!;
     expect(count('star')).toBe(N);
     expect(count('sky')).toBe(1);
+    expect(parent.children.indexOf(parent.children[1])).toBe(1);
     expect(parent.children[1].anims).toHaveLength(0); // the overlay: above the sky, under the ridges
-    expect(parent.children).toHaveLength(3);
+    expect(parent.children).toHaveLength(2 + LAYERS.length);
     const before = baked();
     runFrames(16.7, 300); // 5 s at 60 fps; the overlay repaints at 20 fps
     expect(baked()).toBe(before);
@@ -623,7 +609,7 @@ describe('the starfield in the scene', () => {
     const { parent, canvas } = host();
     const s = createRidgeScene({ canvas, tier: 'full', sky: DAY })!;
     expect(count('star')).toBe(0);
-    expect(parent.children).toHaveLength(2);
+    expect(parent.children).toHaveLength(1 + LAYERS.length);
     runFrames(16.7, 60);
     expect(count('clear')).toBe(0);
     s.dispose();
@@ -702,113 +688,3 @@ describe('the starfield in the scene', () => {
     expect(rafQueue).toHaveLength(0);
   });
 });
-
-describe('endless drift: chunks baked on demand and recycled', () => {
-  const size = layerSize(400, 800, 2); // the fake host: 400 x 800 CSS px at DPR 2
-  const until = async (cond: () => boolean) => {
-    const t0 = Date.now();
-    while (!cond()) {
-      if (Date.now() - t0 > 10000) throw new Error('timed out waiting for the background bakes');
-      await new Promise((r) => setTimeout(r, 5));
-    }
-  };
-  /** The pixels chunk `m` of layer `li` must hold: the pure bake of its world columns, no blur. */
-  const expected = (li: number, m: number) => {
-    const p: BakeParams = {
-      spec: LAYERS[li],
-      sky: DAY,
-      period: size.period,
-      scale: 2,
-      viewH: 1600,
-      rows: size.height,
-      bandH: size.height,
-      px0: m * size.chunk,
-      cols: size.chunk,
-    };
-    const out = new Uint8ClampedArray(p.cols * p.rows * 4);
-    bakeSlice(out, p, layerPaint(p.spec, DAY), 0, p.cols);
-    return Buffer.from(out.buffer);
-  };
-  /** Each distinct ImageData put, in order of first appearance: one per baked chunk. */
-  const baked = () => [...new Set(puts)].map((img) => Buffer.from(img.data.buffer));
-  const start = () => {
-    const { parent, canvas } = host();
-    const records: any[] = [];
-    const s = createRidgeScene({ canvas, tier: 'full', sky: DAY, onBake: (b) => records.push(b) })!;
-    return { parent, s, records };
-  };
-
-  it('bakes every chunk from its own world columns: no offset, the next chunk continues the last', async () => {
-    const { s, records } = start();
-    await until(() => records.length === 3 * LAYERS.length);
-    // First view: chunk 0 of each layer; then, per layer in queue order, chunks 1 and 2.
-    const order = [
-      ...LAYERS.map((l) => [l.index, 0]),
-      ...LAYERS.flatMap((l) => [
-        [l.index, 1],
-        [l.index, 2],
-      ]),
-    ];
-    expect(records.map((r) => [r.layer, r.chunk])).toEqual(order);
-    const imgs = baked();
-    expect(imgs).toHaveLength(order.length);
-    order.forEach(([li, m], i) => expect(imgs[i].equals(expected(li, m))).toBe(true));
-    s.dispose();
-  });
-
-  it('when the drift animation ends, the chunks move one slot left and the track restarts', async () => {
-    const { parent, s, records } = start();
-    await until(() => records.length === 3 * LAYERS.length);
-    const track = tracksOf(parent)[0];
-    const [e0, e1, e2] = track.children;
-    const first = track.anims[0];
-    // One chunk of drift, not one viewport: the track slides by the width of a chunk.
-    expect(first.keyframes[1].transform).toContain(`${-size.chunk / 2}px`);
-    expect(track.animate).toHaveBeenCalledTimes(1);
-    first.finish();
-    expect(first.cancel).toHaveBeenCalled();
-    expect(track.animate).toHaveBeenCalledTimes(2);
-    const w = size.chunk / 2;
-    expect([e1.style.left, e2.style.left, e0.style.left]).toEqual(['0px', `${w}px`, `${2 * w}px`]);
-    expect(track.anims[1].keyframes[1].transform).toContain(`${-w}px`);
-    s.dispose();
-  });
-
-  it('the canvas that left is baked with the next stretch of world, and each rotation after it, without end', async () => {
-    const { parent, s, records } = start();
-    await until(() => records.length === 3 * LAYERS.length);
-    const track = tracksOf(parent)[0];
-    const done = () => records.filter((r) => r.layer === 0).map((r) => r.chunk);
-    for (let m = 3; m <= 5; m += 1) {
-      track.anims[track.anims.length - 1].finish();
-      await until(() => done().includes(m));
-    }
-    expect(done()).toEqual([0, 1, 2, 3, 4, 5]);
-    // The pixels of chunks 3 to 5 are the world's, not a repeat of an earlier one.
-    const imgs = baked();
-    const layer0 = imgs.filter((_, i) => records[i].layer === 0);
-    [3, 4, 5].forEach((m, k) => expect(layer0[3 + k].equals(expected(0, m))).toBe(true));
-    expect(layer0[3].equals(layer0[0])).toBe(false);
-    s.dispose();
-  });
-
-  it('with the blur, each chunk is blurred from a scratch canvas of its own width: seams stay opaque and exact', async () => {
-    const orig = (document as any).createElement;
-    (document as any).createElement = (tag: string) => {
-      const el = orig(tag);
-      el.getContext = vi.fn(() => ctx(true));
-      return el;
-    };
-    const { s, records } = start();
-    await until(() => records.length === 3 * LAYERS.length);
-    const want = new Set(
-      LAYERS.filter((l) => edgeBlur(l) > 0).map(
-        (l) => size.chunk + 2 * Math.ceil(3 * edgeBlur(l) * 2)
-      )
-    );
-    expect(want.size).toBeGreaterThan(1); // the layers' pads differ, which is what a shared canvas gets wrong
-    // Every blur reads a source exactly as wide as that chunk's padded bake, at the moment of the draw.
-    expect(new Set(drawnWidths)).toEqual(want);
-    s.dispose();
-  });
-});
diff --git a/src/app/features/scene/ridge/Ridge.ts b/src/app/features/scene/ridge/Ridge.ts
index 72985d4c..fd40a967 100644
--- a/src/app/features/scene/ridge/Ridge.ts
+++ b/src/app/features/scene/ridge/Ridge.ts
@@ -1,20 +1,18 @@
-/* eslint-disable no-param-reassign -- the bake writes into the canvases and layer records it is handed */
 import type { Scene, SceneOptions } from '../Scene';
 import { overlayRequested } from '../debugOverlays';
 import { FrameSampler, FrameStats } from './probe';
 import { skyColours, SkyColours, Srgb } from './skyColour';
 import { activeAt, drawStars, drawTwinkle as paintTwinkle, makeStars, Star } from './stars';
-import { bakeSlice, BakeParams, layerPaint } from './ridgeBake';
-import { LAYERS, LayerSpec, edgeBlur, layerSize, scatterAlpha, transmittance } from './ridgeWorld';
-
-/** One chunk's bake: `ms` is the summed task time, `maxTaskMs` the longest single task; `first` marks the bake of the first view. */
-export interface BakeRecord {
-  layer: number;
-  chunk: number;
-  ms: number;
-  maxTaskMs: number;
-  first: boolean;
-}
+import {
+  LAYERS,
+  LayerSpec,
+  edgeBlur,
+  hazeColour,
+  layerColour,
+  layerSize,
+  ridgeY,
+  scatterAlpha,
+} from './ridgeWorld';
 
 export type RidgeOptions = Pick<SceneOptions, 'canvas' | 'tier'> & {
   /** Show the rAF median/p95 readout. Default: the page URL has `?probe=1`, where `debug` allows it. */
@@ -25,11 +23,15 @@ export type RidgeOptions = Pick<SceneOptions, 'canvas' | 'tier'> & {
   onProbe?: (s: FrameStats & { still: boolean }) => void;
   /** The sky's colours; default `skyColours()`, the one function to replace with Void's sun.js. */
   sky?: SkyColours;
-  /** Called after each chunk is baked (a chunk is one layer's stretch of world-x): the cost record. */
-  onBake?: (b: BakeRecord) => void;
 };
 
 const css = (c: Srgb): string => `rgb(${c[0]},${c[1]},${c[2]})`;
+const mix = (a: Srgb, b: Srgb, t: number): Srgb => [
+  Math.round(a[0] + (b[0] - a[0]) * t),
+  Math.round(a[1] + (b[1] - a[1]) * t),
+  Math.round(a[2] + (b[2] - a[2]) * t),
+];
+
 function context2d(c: HTMLCanvasElement): CanvasRenderingContext2D | null {
   return c.getContext('2d');
 }
@@ -47,202 +49,95 @@ function paintSky(canvas: HTMLCanvasElement, sky: SkyColours): boolean {
   return true;
 }
 
-const clock = (): number => (typeof performance !== 'undefined' ? performance.now() : Date.now());
-
-type Size = ReturnType<typeof layerSize>;
-
 const SCATTER_STOPS = 16;
 
-/** Warm in-scatter over the silhouette only (source-atop): a horizontal gradient over the chunk's world-x. */
+/** Warm in-scatter over the silhouette only (source-atop), as a horizontal gradient that repeats each period. */
 function scatter(
   ctx: CanvasRenderingContext2D,
   spec: LayerSpec,
   sky: SkyColours,
-  widthPx: number,
-  heightPx: number,
-  t0: number,
-  tPerPx: number,
-  bandX = 0,
-  bandW = widthPx
+  size: { period: number; width: number; height: number }
 ) {
-  if (sky.sunAzimuth === undefined || transmittance(spec) >= 1) return; // the nearest layer takes none
-  const g = ctx.createLinearGradient(0, 0, widthPx, 0);
+  if (sky.sunAzimuth === undefined || scatterAlpha(spec, sky, sky.sunAzimuth) <= 0) return;
+  const g = ctx.createLinearGradient(0, 0, size.width, 0);
   const [r, gr, b] = sky.horizon;
-  for (let k = 0; k <= SCATTER_STOPS; k += 1) {
-    const a = scatterAlpha(spec, sky, t0 + (tPerPx * widthPx * k) / SCATTER_STOPS);
-    g.addColorStop(k / SCATTER_STOPS, `rgba(${r},${gr},${b},${a})`);
+  for (let k = 0; k <= 2 * SCATTER_STOPS; k += 1) {
+    const t = (k % SCATTER_STOPS) / SCATTER_STOPS;
+    g.addColorStop(k / (2 * SCATTER_STOPS), `rgba(${r},${gr},${b},${scatterAlpha(spec, sky, t)})`);
   }
   ctx.globalCompositeOperation = 'source-atop';
   ctx.fillStyle = g;
-  ctx.fillRect(bandX, 0, bandW, heightPx);
+  ctx.fillRect(0, 0, size.width, size.height);
   ctx.globalCompositeOperation = 'source-over';
 }
 
-/** A chunk's bake in slices: `step(budgetMs)` returns true once the chunk is on its canvas. */
-interface Job {
-  step(budgetMs: number): boolean;
+/**
+ * Soften the silhouette's edge by `px` once, where the browser's 2D canvas supports `filter` (not
+ * Safari, which keeps the sharp edge). One period is tiled past both ends and the bottom row extended below,
+ * then blurred in a single draw, so the blur sees the wrap and the ground instead of fading at borders.
+ */
+function soften(src: HTMLCanvasElement, px: number, period: number): HTMLCanvasElement {
+  const probe = context2d(src);
+  if (!probe || px <= 0 || !('filter' in probe)) return src;
+  const pad = Math.ceil(3 * px);
+  // The unfiltered tiling: blurring tile by tile would fade each tile's own border.
+  const tiled = document.createElement('canvas');
+  tiled.width = src.width + 2 * period;
+  tiled.height = src.height + pad;
+  const tctx = context2d(tiled);
+  const out = document.createElement('canvas');
+  out.width = src.width;
+  out.height = src.height;
+  const ctx = context2d(out);
+  if (!tctx || !ctx) return src;
+  for (let k = 0; k < 4; k += 1) {
+    tctx.drawImage(src, 0, 0, period, src.height, k * period, 0, period, src.height);
+    tctx.drawImage(src, 0, src.height - 1, period, 1, k * period, src.height, period, pad);
+  }
+  ctx.filter = `blur(${px}px)`;
+  ctx.drawImage(tiled, -period, 0);
+  ctx.filter = 'none';
+  return out;
 }
 
-/**
- * One layer's stretch of world-x `[m * chunk, (m + 1) * chunk)` painted onto `el`, in three phases of
- * column bands, each band sized to the task budget by measuring the last one: bake the pixels
- * (`bakeSlice`), put them on a canvas with the in-scatter, and (where the 2D `filter` exists) blur them
- * into `el`. The blur needs neighbours, so the pixels are baked `pad` columns past both ends and
- * the bottom into a scratch canvas this job owns, and each blurred band reads `pad` columns either side of
- * itself: seams show no fade. The scratch is made when the job first runs and dropped when it ends.
- */
-function chunkJob(
-  el: HTMLCanvasElement,
-  makeCanvas: () => HTMLCanvasElement,
+/** One ridge layer, painted once: a filled silhouette two periods wide on a plain 2D canvas. */
+function paintLayer(
   spec: LayerSpec,
   sky: SkyColours,
-  size: Size,
+  size: { period: number; width: number; height: number },
   viewH: number,
-  scale: number,
-  m: number,
-  record: (ms: number, maxTaskMs: number) => void
-): Job | null {
+  scale: number
+): HTMLCanvasElement | null {
+  const el = document.createElement('canvas');
+  el.width = size.width;
+  el.height = size.height;
   const ctx = context2d(el);
   if (!ctx) return null;
-  const blur = edgeBlur(spec) * scale;
-  const pad = blur > 0 && 'filter' in ctx ? Math.ceil(3 * blur) : 0;
-  const cols = size.chunk + 2 * pad;
-  const rows = size.height + pad;
-  const params: BakeParams = {
-    spec,
-    sky,
-    period: size.period,
-    scale,
-    viewH,
-    rows,
-    bandH: size.height,
-    px0: m * size.chunk - pad,
-    cols,
-  };
-  const paint = layerPaint(spec, sky);
-  const t0World = params.px0 / size.period;
-  let scratch: HTMLCanvasElement | undefined;
-  let sctx: CanvasRenderingContext2D | null = ctx;
-  let img: ImageData | undefined;
-  /** 0 bake, 1 put and in-scatter, 2 blur into el; a chunk with no blur ends after 1. */
-  let phase = 0;
-  let pos = 0;
-  let sliceCols = 32;
-  let total = 0;
-  let longest = 0;
-  const last = pad > 0 ? 2 : 1;
-  const start = (): boolean => {
-    if (pad > 0) {
-      scratch = makeCanvas();
-      scratch.width = cols;
-      scratch.height = rows;
-      sctx = context2d(scratch);
-    } else {
-      el.width = size.chunk;
-      el.height = size.height;
-    }
-    if (!sctx) return false;
-    img = sctx.createImageData(cols, rows);
-    return true;
-  };
-  const work = (x: number, n: number) => {
-    if (!img || !sctx) return;
-    if (phase === 0) bakeSlice(img.data, params, paint, x, x + n);
-    else if (phase === 1) {
-      sctx.putImageData(img, 0, 0, x, 0, n, rows);
-      scatter(sctx, spec, sky, cols, rows, t0World, 1 / size.period, x, n);
-    } else {
-      // One draw: a blurred draw cut into bands costs more in the margins than it saves in task length.
-      ctx.drawImage(scratch as HTMLCanvasElement, -pad, 0);
-    }
-  };
-  return {
-    step(budgetMs) {
-      const t0 = clock();
-      // Allocating the canvases and the pixel buffer is a task of its own.
-      if (!img) {
-        if (!start()) return true;
-        if (Number.isFinite(budgetMs)) {
-          total += clock() - t0;
-          longest = Math.max(longest, clock() - t0);
-          return false;
-        }
-      }
-      while (phase <= last && clock() - t0 < budgetMs) {
-        const end = phase === 2 ? size.chunk : cols;
-        if (pos === 0 && phase === 2) {
-          el.width = size.chunk;
-          el.height = size.height;
-          ctx.filter = `blur(${blur}px)`;
-        }
-        const n = phase === 2 ? end : Math.min(end - pos, sliceCols);
-        const s0 = clock();
-        work(pos, n);
-        pos += n;
-        const dt = Math.max(clock() - s0, 0.02);
-        sliceCols = Number.isFinite(budgetMs)
-          ? Math.max(8, Math.min(512, Math.round((n * budgetMs * 0.4) / dt)))
-          : cols;
-        if (pos >= end) {
-          if (phase === 2) ctx.filter = 'none';
-          phase += 1;
-          pos = 0;
-          if (phase === 1 || phase === 2) sliceCols = Number.isFinite(budgetMs) ? 64 : cols;
-        }
-      }
-      const dt = clock() - t0;
-      total += dt;
-      longest = Math.max(longest, dt);
-      const done = phase > last;
-      if (done) {
-        img = undefined;
-        if (scratch) {
-          scratch.width = 0;
-          scratch.height = 0;
-        }
-        scratch = undefined;
-        record(total, longest);
-      }
-      return done;
-    },
-  };
-}
-
-interface Chunk {
-  el: HTMLCanvasElement;
-  /** World chunk index it holds or is being baked to hold. */
-  id: number;
-  job?: Job;
-  ready: boolean;
-}
-
-/** One layer: a track that drifts by one chunk per animation, holding three chunk canvases. */
-interface LayerState {
-  spec: LayerSpec;
-  track: HTMLElement;
-  /** Slot 0 and 1 are what the window can see; slot 2 is the one ahead, baked in the background. */
-  slots: Chunk[];
-  anim?: Animation;
+  const top: number[] = [];
+  for (let x = 0; x < size.period; x += 1)
+    top.push(ridgeY(spec, x, size.period, size.height, viewH));
+  const c = layerColour(spec, sky);
+  const g = ctx.createLinearGradient(0, 0, 0, size.height);
+  g.addColorStop(0, css(c));
+  g.addColorStop(1, css(mix(c, hazeColour(sky), 0.5 * (1 - spec.depth))));
+  ctx.fillStyle = g;
+  ctx.beginPath();
+  ctx.moveTo(0, size.height);
+  for (let x = 0; x <= size.width; x += 1) ctx.lineTo(x, top[x % size.period]);
+  ctx.lineTo(size.width, size.height);
+  ctx.closePath();
+  ctx.fill();
+  scatter(ctx, spec, sky, size);
+  return soften(el, edgeBlur(spec) * scale, size.period);
 }
 
 interface Built {
-  rig: HTMLElement;
-  layers: LayerState[];
-  sway?: Animation;
-  size: Size;
-  /** CSS px to canvas px, and the viewport's height in canvas px, as baked. */
-  scale: number;
-  viewH: number;
-  /** Makes a canvas, bound to the document the scene was built in. */
-  makeCanvas: () => HTMLCanvasElement;
+  layers: HTMLCanvasElement[];
+  anims: Animation[];
   /** The twinkling stars' own canvas, between the sky and the ridges; absent in a day sky and in 'still'. */
   twinkle?: HTMLCanvasElement;
 }
 
-/** Yaw and pitch: the camera's slow sway, a loop of this many seconds over the whole rig. */
-const SWAY_SECONDS = 150;
-const SLICE_BUDGET_MS = 6;
-
 /** The twinkle overlay redraws at most this often: the swings are 2 to 7 s, no need for 60 fps. */
 const TWINKLE_FRAME_MS = 50;
 
@@ -267,9 +162,6 @@ export function createRidgeScene(opts: RidgeOptions): Scene | null {
   let twRaf = 0;
   let twLast = 0;
   let still = tier === 'still';
-  let jobTimer: ReturnType<typeof setTimeout> | undefined;
-  let queue: Chunk[] = [];
-  let generation = 0;
   let disposed = false;
   let raf = 0;
   let readout: HTMLElement | undefined;
@@ -283,13 +175,8 @@ export function createRidgeScene(opts: RidgeOptions): Scene | null {
   };
 
   const teardownLayers = () => {
-    generation += 1;
-    clearTimeout(jobTimer);
-    jobTimer = undefined;
-    queue = [];
-    built?.sway?.cancel();
-    built?.layers.forEach((l) => l.anim?.cancel());
-    built?.rig.remove();
+    built?.anims.forEach((a) => a.cancel());
+    built?.layers.forEach((l) => l.remove());
     built?.twinkle?.remove();
     cancelAnimationFrame(twRaf);
     twRaf = 0;
@@ -303,109 +190,6 @@ export function createRidgeScene(opts: RidgeOptions): Scene | null {
     return size.period < 1 || size.height < 1 || Math.round(h * scale) < 1;
   };
 
-  /**
-   * Start baking chunk `c` of layer `l`. `first` runs it to the end in this task (the first view);
-   * otherwise it joins the queue, which `pump` works through in short tasks. False when the canvas has no 2D context.
-   */
-  const bake = (l: LayerState, c: Chunk, first: boolean): boolean => {
-    if (!built) return false;
-    const { scale, viewH, makeCanvas } = built;
-    const job = chunkJob(
-      c.el,
-      makeCanvas,
-      l.spec,
-      sky,
-      built.size,
-      viewH,
-      scale,
-      c.id,
-      (ms, maxTaskMs) => {
-        c.ready = true;
-        c.job = undefined;
-        opts.onBake?.({ layer: l.spec.index, chunk: c.id, ms, maxTaskMs, first });
-      }
-    );
-    if (!job) return false;
-    c.ready = false;
-    c.job = job;
-    if (first) job.step(Infinity);
-    else queue.push(c);
-    return true;
-  };
-
-  const pump = () => {
-    if (jobTimer !== undefined || !queue.length) return;
-    const gen = generation;
-    jobTimer = setTimeout(() => {
-      jobTimer = undefined;
-      if (gen !== generation) return;
-      const c = queue[0];
-      if (!c.job || c.job.step(SLICE_BUDGET_MS)) queue.shift();
-      pump();
-    }, 0);
-  };
-
-  /** Bake a still-queued chunk to the end now: only when the drift has caught up with the background work. */
-  const flush = (c: Chunk) => {
-    while (c.job && !c.job.step(Infinity));
-    queue = queue.filter((q) => q !== c);
-  };
-
-  const chunkSeconds = (spec: LayerSpec, size: Size) => (spec.seconds * size.chunk) / size.period;
-
-  /** One chunk of drift as one animation, holding its end until `rotate` hands the track the next chunk. */
-  const startDrift = (l: LayerState, onEnd: (l: LayerState) => void) => {
-    if (!built) return;
-    const { size, scale } = built;
-    l.anim = l.track.animate?.(
-      [
-        { transform: 'translate3d(0,0,0)' },
-        { transform: `translate3d(${-size.chunk / scale}px,0,0)` },
-      ],
-      { duration: chunkSeconds(l.spec, size) * 1000, easing: 'linear', fill: 'forwards' }
-    );
-    if (l.anim) l.anim.onfinish = () => onEnd(l);
-  };
-
-  /**
-   * The window has drifted one chunk. Slot 1 is now slot 0 and slot 2 slot 1, at the same screen place
-   * (the track restarts at 0 and the chunks move one slot left in the same task, so nothing jumps); the
-   * canvas that left becomes slot 2 and is baked with the world one chunk further on, off the critical path.
-   */
-  const rotate = (l: LayerState) => {
-    if (!built || !built.layers.includes(l)) return;
-    const [s0, s1, s2] = l.slots;
-    flush(s1);
-    flush(s2);
-    l.slots = [s1, s2, s0];
-    s0.id = s2.id + 1;
-    const { size, scale } = built;
-    l.slots.forEach((c, i) => {
-      c.el.style.left = `${(i * size.chunk) / scale}px`;
-    });
-    l.anim?.cancel();
-    startDrift(l, rotate);
-    bake(l, s0, false);
-    pump();
-    syncPlayState();
-  };
-
-  /** The camera's slow yaw and pitch: the rig eases sideways (up to 5% of the width) and down (up to 3% of the height) and back, in a loop. */
-  const startSway = (rig: HTMLElement, w: number, h: number) => {
-    const x = 0.05 * w;
-    const y = 0.03 * h;
-    const at = (fx: number, fy: number) => `translate3d(${-x * fx}px,${y * fy}px,0)`;
-    return rig.animate?.(
-      [
-        { transform: at(0, 0), offset: 0 },
-        { transform: at(0.55, 1), offset: 0.35 },
-        { transform: at(1, 0.3), offset: 0.7 },
-        { transform: at(0, 0), offset: 1 },
-      ],
-      { duration: SWAY_SECONDS * 1000, iterations: Infinity, easing: 'ease-in-out' }
-    );
-  };
-
   /** Bake the sky, then the layers. Returns false when a 2D context is missing or there is no area yet. */
   const build = (): boolean => {
     teardownLayers();
@@ -416,6 +200,7 @@ export function createRidgeScene(opts: RidgeOptions): Scene | null {
     canvas.width = size.period;
     canvas.height = Math.round(h * scale);
     if (!paintSky(canvas, sky)) return false;
+    const layers: HTMLCanvasElement[] = [];
     // Every star is baked into the sky; the twinkling ones get their own canvas, which a per-frame
     // pass clears and paints over. 'still' has no overlay.
     const stars = makeStars(sky, w, h);
@@ -438,73 +223,39 @@ export function createRidgeScene(opts: RidgeOptions): Scene | null {
       parent.appendChild(twinkle);
     }
     field = stars;
-    // The rig carries the camera's sway; each layer's track carries its drift; chunks sit on the track.
-    const rig = document.createElement('div');
-    rig.setAttribute('aria-hidden', 'true');
-    Object.assign(rig.style, {
-      position: 'absolute',
-      left: '0',
-      bottom: '0',
-      width: '100%',
-      height: '100%',
-      pointerEvents: 'none',
-      willChange: 'transform',
-    });
-    const layers: LayerState[] = LAYERS.map((spec) => {
-      const track = document.createElement('div');
-      Object.assign(track.style, {
+    for (const spec of LAYERS) {
+      const el = paintLayer(spec, sky, size, canvas.height, scale);
+      if (!el) {
+        layers.forEach((l) => l.remove());
+        twinkle?.remove();
+        return false;
+      }
+      el.setAttribute('aria-hidden', 'true');
+      Object.assign(el.style, {
         position: 'absolute',
         left: '0',
         bottom: '0',
-        width: `${size.period / scale}px`,
+        width: `${size.width / scale}px`,
         height: `${size.height / scale}px`,
+        pointerEvents: 'none',
         willChange: 'transform',
       });
-      const slots: Chunk[] = [0, 1, 2].map((i) => {
-        const el = document.createElement('canvas');
-        el.width = size.chunk;
-        el.height = size.height;
-        Object.assign(el.style, {
-          position: 'absolute',
-          bottom: '0',
-          width: `${size.chunk / scale}px`,
-          height: `${size.height / scale}px`,
-        });
-        return { el, id: i, ready: false };
-      });
-      return { spec, track, slots };
-    });
-    const doc = document;
-    built = {
-      rig,
-      layers,
-      size,
-      scale,
-      viewH: canvas.height,
-      makeCanvas: () => doc.createElement('canvas'),
-      twinkle,
-    };
-    // First view: only slot 0 of each layer, in this task. The window sees nothing else for the first
-    // fifth of a chunk's drift; slots 1 and 2 are baked in short tasks behind it.
-    if (!layers.every((l) => bake(l, l.slots[0], true))) {
-      teardownLayers();
-      return false;
+      layers.push(el);
     }
-    layers.forEach((l) => {
-      l.slots.forEach((c, i) => {
-        c.el.setAttribute('aria-hidden', 'true');
-        c.el.style.left = `${(i * size.chunk) / scale}px`;
-        l.track.appendChild(c.el);
-      });
-      rig.appendChild(l.track);
-      bake(l, l.slots[1], false);
-      bake(l, l.slots[2], false);
-    });
     // DOM order is paint order: farthest first, so the nearest ridge ends up on top.
-    parent.appendChild(rig);
-    layers.forEach((l) => startDrift(l, rotate));
-    built.sway = startSway(rig, w, h);
-    pump();
+    layers.forEach((l) => parent.appendChild(l));
+    const anims = layers
+      .map((el, i) =>
+        el.animate?.(
+          [
+            { transform: 'translate3d(0,0,0)' },
+            { transform: `translate3d(${-size.period / scale}px,0,0)` },
+          ],
+          { duration: LAYERS[i].seconds * 1000, iterations: Infinity, easing: 'linear' }
+        )
+      )
+      .filter((a): a is Animation => !!a);
+    built = { layers, anims, twinkle };
     syncPlayState();
     return true;
   };
@@ -537,8 +288,7 @@ export function createRidgeScene(opts: RidgeOptions): Scene | null {
   };
 
   function syncPlayState() {
-    const anims = built ? [built.sway, ...built.layers.map((l) => l.anim)] : [];
-    anims.forEach((a) => (moving() ? a?.play() : a?.pause()));
+    built?.anims.forEach((a) => (moving() ? a.play() : a.pause()));
     if (!built?.twinkle) return;
     if (moving()) {
       if (!twRaf) twRaf = requestAnimationFrame(twTick);
@@ -555,15 +305,13 @@ export function createRidgeScene(opts: RidgeOptions): Scene | null {
     still = true;
     const ctx = context2d(canvas);
     if (ctx && built) {
-      const { size } = built;
-      built.layers.forEach((l) => {
-        // Freeze where the drift is, so the swap to a still does not jump; whatever is baked and in view.
-        const dur = chunkSeconds(l.spec, size) * 1000;
-        const p = Math.min(1, Math.max(0, Number(l.anim?.currentTime ?? 0) / dur));
-        const x = -Math.round(p * size.chunk);
-        l.slots.slice(0, 2).forEach((c, i) => {
-          if (c.ready) ctx.drawImage(c.el, x + i * size.chunk, canvas.height - size.height);
-        });
+      const { anims } = built;
+      built.layers.forEach((l, i) => {
+        // Freeze where the drift is, so the swap to a still does not jump.
+        const a = anims[i];
+        const t = Number(a?.currentTime ?? 0);
+        const turns = (t % (LAYERS[i].seconds * 1000)) / (LAYERS[i].seconds * 1000);
+        ctx.drawImage(l, -Math.round(turns * canvas.width), canvas.height - l.height);
       });
     }
     teardownLayers();
diff --git a/src/app/features/scene/ridge/noise.ts b/src/app/features/scene/ridge/noise.ts
index 20d97a4d..77af507d 100644
--- a/src/app/features/scene/ridge/noise.ts
+++ b/src/app/features/scene/ridge/noise.ts
@@ -1,7 +1,7 @@
-// CultMath's value noise on the CPU, in one dimension, over the whole line (no period). Clean-room:
-// the algorithm is read from shaders/CultMath.glsl (`cultmath_hash`, `cultmath_value_noise`), not
-// copied from any other terrain. Doubles instead of floats, so values differ from the GLSL in the
-// last digits; nothing here has to match a shader.
+// CultMath's value noise and fbm on the CPU, in one dimension and periodic. Clean-room: the
+// algorithm is read from shaders/CultMath.glsl (`cultmath_hash`, `cultmath_value_noise`), not copied
+// from any other terrain. Doubles instead of floats, so values differ from the GLSL in the last
+// digits; nothing here has to match a shader.
 
 const frac = (v: number): number => v - Math.floor(v);
 
@@ -12,14 +12,40 @@ export const hash2 = (x: number, y: number): number =>
 const smooth = (t: number): number => t * t * (3 - 2 * t);
 
 /**
- * `cultmath_value_noise` along row `row` of the lattice, in [0, 1). `row` is an integer, so the
- * vertical blend of the 2D original is the identity. The lattice is hashed per cell, never wrapped:
- * a ridge is a function of world-x, with no period for the eye to find.
+ * `cultmath_value_noise` along row `row` of the lattice, with the lattice wrapping every `period`
+ * cells: noise(x + period) === noise(x). `row` is an integer, so the vertical blend of the 2D
+ * original is the identity.
  */
-export function valueNoise(x: number, row: number): number {
+export function valueNoisePeriodic(x: number, row: number, period: number): number {
   const cell = Math.floor(x);
   const u = smooth(x - cell);
-  const a = hash2(cell, row);
-  const b = hash2(cell + 1, row);
+  const wrap = (c: number) => ((c % period) + period) % period;
+  const a = hash2(wrap(cell), row);
+  const b = hash2(wrap(cell + 1), row);
   return a + (b - a) * u;
 }
+
+export interface FbmShape {
+  octaves: number;
+  lacunarity: number;
+  gain: number;
+}
+
+/**
+ * Fractal sum in [0, 1]. `t` runs 0..1 across one period; the first octave has `baseCells` cells
+ * per period and each next one `lacunarity` times more, so `baseCells * lacunarity^k` must be an
+ * integer for the sum to be periodic (checked by the caller's config, not here).
+ */
+export function fbmPeriodic(t: number, row: number, baseCells: number, s: FbmShape): number {
+  let sum = 0;
+  let norm = 0;
+  let amp = 1;
+  let cells = baseCells;
+  for (let k = 0; k < s.octaves; k += 1) {
+    sum += amp * valueNoisePeriodic(t * cells, row + k * 13, cells);
+    norm += amp;
+    amp *= s.gain;
+    cells *= s.lacunarity;
+  }
+  return sum / norm;
+}
diff --git a/src/app/features/scene/ridge/ridgeBake.test.ts b/src/app/features/scene/ridge/ridgeBake.test.ts
deleted file mode 100644
index 7c452954..00000000
--- a/src/app/features/scene/ridge/ridgeBake.test.ts
+++ /dev/null
@@ -1,303 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { BakeParams, bakeSlice, faceLight, layerPaint, sunDirection } from './ridgeBake';
-import { LACUNARITY, LAYERS, profile } from './ridgeWorld';
-import { skyColours, SkyColours } from './skyColour';
-
-const SKY: SkyColours = { ...skyColours(), sunAzimuth: 0.3 }; // sun toward +x
-const PERIOD = 400;
-const VIEW_H = 800;
-const BAND = 480;
-
-const params = (
-  li: number,
-  px0: number,
-  cols: number,
-  over: Partial<BakeParams> = {}
-): BakeParams => ({
-  spec: LAYERS[li],
-  sky: SKY,
-  period: PERIOD,
-  scale: 1,
-  viewH: VIEW_H,
-  rows: BAND,
-  bandH: BAND,
-  px0,
-  cols,
-  ...over,
-});
-
-function bake(p: BakeParams, slices: number[] = [p.cols]): Uint8ClampedArray {
-  const out = new Uint8ClampedArray(p.cols * p.rows * 4);
-  const paint = layerPaint(p.spec, p.sky);
-  let c = 0;
-  for (const n of slices) {
-    bakeSlice(out, p, paint, c, Math.min(p.cols, c + n));
-    c += n;
-  }
-  return out;
-}
-
-const lum = (d: Uint8ClampedArray, cols: number, x: number, y: number) => {
-  const o = (y * cols + x) * 4;
-  return 0.2126 * d[o] + 0.7152 * d[o + 1] + 0.0722 * d[o + 2];
-};
-/** First row of column x whose alpha is full. */
-const solidRow = (d: Uint8ClampedArray, cols: number, x: number) => {
-  let y = 0;
-  while (y < BAND && d[(y * cols + x) * 4 + 3] < 255) y += 1;
-  return y;
-};
-
-describe('the field is a function of world-x', () => {
-  it('is deterministic, and defined and bounded at any world-x', () => {
-    for (const spec of LAYERS) {
-      for (const t of [-40.3, 0, 0.5, 17.77, 5000.123]) {
-        expect(profile(spec, t)).toBe(profile(spec, t));
-        expect(profile(spec, t)).toBeGreaterThanOrEqual(0);
-        expect(profile(spec, t)).toBeLessThanOrEqual(1);
-      }
-    }
-  });
-
-  it('has no repeat at the old period (1 viewport) or its multiples: the profile differs from itself shifted', () => {
-    for (const spec of LAYERS) {
-      for (const lag of [1, 2, 3, 0.5]) {
-        let diff = 0;
-        for (let i = 0; i < 400; i += 1)
-          diff += Math.abs(profile(spec, i / 100) - profile(spec, i / 100 + lag));
-        expect(diff / 400).toBeGreaterThan(0.04);
-      }
-    }
-  });
-
-  it('the same world column bakes to the same pixels whichever chunk or slice paints it', () => {
-    for (const li of [0, 3]) {
-      const whole = bake(params(li, 1000, 200));
-      const sliced = bake(params(li, 1000, 200), [37, 64, 1000]);
-      expect(Array.from(sliced)).toEqual(Array.from(whole));
-      // A chunk starting 120 columns later sees the same pixels for the columns it shares.
-      const shifted = bake(params(li, 1120, 80));
-      for (const x of [0, 17, 79]) {
-        for (const y of [0, 100, 300, BAND - 1]) {
-          const a = (y * 200 + 120 + x) * 4;
-          const b = (y * 80 + x) * 4;
-          expect(Array.from(shifted.slice(b, b + 4))).toEqual(Array.from(whole.slice(a, a + 4)));
-        }
-      }
-    }
-  });
-
-  it('is continuous across a chunk seam: the crest steps no more at the seam than elsewhere', () => {
-    const chunk = Math.round(PERIOD * 1.2);
-    for (const li of [0, 1, 2, 3]) {
-      const p = params(li, chunk - 40, 80);
-      const d = bake(p);
-      let worst = 0;
-      for (let x = 1; x < 80; x += 1)
-        worst = Math.max(worst, Math.abs(solidRow(d, 80, x) - solidRow(d, 80, x - 1)));
-      const seam = Math.abs(solidRow(d, 80, 40) - solidRow(d, 80, 39));
-      expect(seam).toBeLessThanOrEqual(Math.max(worst, 1));
-      // and the seam columns equal a chunk baked from the other side
-      const other = bake(params(li, chunk - 40, 80, { cols: 80 }));
-      expect(Array.from(other)).toEqual(Array.from(d));
-    }
-  });
-});
-
-describe('shading from the slope normal', () => {
-  const sun = sunDirection(SKY);
-
-  it('the sun is toward +x for azimuth 0.3', () => {
-    expect(sun[0]).toBeGreaterThan(0.5);
-  });
-
-  it('a face looking at the sun is lit more than one looking away', () => {
-    // slope < 0: the crest falls toward +x, so the face looks at +x, at the sun.
-    for (const s of [0.2, 0.6, 1.5]) expect(faceLight(-s, sun)).toBeGreaterThan(faceLight(s, sun));
-    expect(faceLight(1.5, sun)).toBeLessThan(0.2);
-    expect(faceLight(-1.5, sun)).toBeGreaterThan(0.6);
-  });
-
-  it('in the baked pixels the lit side is brighter than the shadow side', () => {
-    for (const li of [0, 1, 2]) {
-      const cols = 900;
-      const p = params(li, 0, cols);
-      const d = bake(p);
-      const slope = (x: number) => (solidRow(d, cols, x - 1) - solidRow(d, cols, x + 1)) / 2; // rows up per column
-      const litX: number[] = [];
-      const shadeX: number[] = [];
-      for (let x = 2; x < cols - 2; x += 1) {
-        if (slope(x) < -0.8) litX.push(x);
-        if (slope(x) > 0.8) shadeX.push(x);
-      }
-      expect(litX.length).toBeGreaterThan(5);
-      expect(shadeX.length).toBeGreaterThan(5);
-      const mean = (xs: number[]) =>
-        xs.reduce((a, x) => a + lum(d, cols, x, solidRow(d, cols, x) + 12), 0) / xs.length;
-      expect(mean(litX)).toBeGreaterThan(mean(shadeX));
-    }
-  });
-
-  it('a lit crest rim: the crest pixels are brighter than the face a little below, on both sides', () => {
-    for (const li of [0, 1, 2, 3]) {
-      const cols = 600;
-      const d = bake(params(li, 300, cols));
-      let rimmed = 0;
-      let n = 0;
-      for (let x = 3; x < cols - 3; x += 1) {
-        const y = solidRow(d, cols, x);
-        if (y + 40 >= BAND) continue;
-        n += 1;
-        if (lum(d, cols, x, y + 1) > lum(d, cols, x, y + 30)) rimmed += 1;
-      }
-      expect(n).toBeGreaterThan(100);
-      expect(rimmed / n).toBeGreaterThan(0.8);
-    }
-  });
-
-  it('the foot of the face is hazier than its top: it moves toward the haze colour', () => {
-    const cols = 300;
-    const p = params(0, 0, cols);
-    const d = bake(p);
-    const haze = layerPaint(p.spec, p.sky).haze;
-    const dist = (x: number, y: number) => {
-      const o = (y * cols + x) * 4;
-      return Math.hypot(d[o] - haze[0], d[o + 1] - haze[1], d[o + 2] - haze[2]);
-    };
-    let nearer = 0;
-    let n = 0;
-    for (let x = 0; x < cols; x += 1) {
-      const y = solidRow(d, cols, x);
-      if (y + 200 >= BAND) continue;
-      n += 1;
-      if (dist(x, y + 200) < dist(x, y + 20)) nearer += 1;
-    }
-    expect(n).toBeGreaterThan(50);
-    expect(nearer / n).toBeGreaterThan(0.9);
-  });
-
-  it('erosion streaks run down the face: brightness varies across columns at one depth, and not without them', () => {
-    const cols = 500;
-    const spread = (gully: number) => {
-      const d = bake(params(2, 0, cols, { spec: { ...LAYERS[2], gully } }));
-      // The same depth below the crest in every column, in the lit-independent part (gullies darken, lit is column-wise).
-      const v: number[] = [];
-      for (let x = 0; x < cols; x += 1) {
-        const y = solidRow(d, cols, x);
-        if (y + 90 < BAND) v.push(lum(d, cols, x, y + 80) / Math.max(1, lum(d, cols, x, y + 8)));
-      }
-      const m = v.reduce((a, b) => a + b, 0) / v.length;
-      return v.reduce((a, b) => a + (b - m) ** 2, 0) / v.length;
-    };
-    expect(spread(LAYERS[2].gully)).toBeGreaterThan(spread(0) * 1.2);
-  });
-});
-
-describe('bake cost', () => {
-  it('is recorded, not asserted: one chunk of every layer at 1280 x 720', () => {
-    const period = 1280;
-    const rows = Math.round(720 * 0.6);
-    const ms = LAYERS.map((spec) => {
-      const p: BakeParams = {
-        spec,
-        sky: SKY,
-        period,
-        scale: 1,
-        viewH: 720,
-        rows,
-        bandH: rows,
-        px0: 0,
-        cols: Math.round(period * 1.2),
-      };
-      const t0 = performance.now();
-      bake(p);
-      return performance.now() - t0;
-    });
-    expect(ms.every((v) => Number.isFinite(v) && v >= 0)).toBe(true);
-    console.info(
-      `ridge bake ms per layer (node, 1 chunk, 1280x720): ${ms.map((v) => v.toFixed(1)).join(' ')}`
-    );
-  });
-});
-
-describe('the ridged multifractal core, each rule on its own', () => {
-  const one = { ...LAYERS[0], octaves: 1, warp: 0, crag: 1 };
-
-  it('folds each octave at its crest: a creased, sharp ridge line, not a smooth swell', () => {
-    // Largest second difference over a fine scan. A smooth curve of this size stays in the hundreds;
-    // a fold leaves a crease where the noise crosses its midpoint.
-    const h = 1e-3;
-    let worst = 0;
-    for (let i = 1; i < 20000; i += 1) {
-      const t = i * h;
-      worst = Math.max(
-        worst,
-        Math.abs(profile(one, t + h) - 2 * profile(one, t) + profile(one, t - h)) / (h * h)
-      );
-    }
-    expect(worst).toBeGreaterThan(2000);
-  });
-
-  it('domain-warps: the same layer without its warp is a measurably different line', () => {
-    const spec = LAYERS[1];
-    let diff = 0;
-    for (let i = 0; i < 2000; i += 1)
-      diff += Math.abs(profile(spec, i / 100) - profile({ ...spec, warp: 0 }, i / 100));
-    expect(diff / 2000).toBeGreaterThan(0.02);
-  });
-
-  it('weights each octave by the previous one: where the first octave is low, the later ones add almost nothing', () => {
-    const lo = { ...LAYERS[1], octaves: 1, warp: 0 };
-    const hi = { ...LAYERS[1], octaves: 5, warp: 0 };
-    let valley = 0;
-    let nv = 0;
-    let peak = 0;
-    let np = 0;
-    for (let i = 0; i < 10000; i += 1) {
-      const a = profile(lo, i / 500);
-      const d = Math.abs(profile(hi, i / 500) - a);
-      if (a < 0.12) {
-        valley += d;
-        nv += 1;
-      } else if (a > 0.35) {
-        peak += d;
-        np += 1;
-      }
-    }
-    expect(nv).toBeGreaterThan(200);
-    expect(np).toBeGreaterThan(200);
-    expect(valley / nv).toBeLessThan(0.25 * (peak / np));
-  });
-
-  it('octave lattices do not line up: the lacunarity is not a power of two', () => {
-    expect(Number.isInteger(Math.log2(LACUNARITY))).toBe(false);
-    expect(Number.isInteger(LACUNARITY)).toBe(false);
-  });
-
-  it('distance flattens relief: contrast falls from the nearest layer to the farthest', () => {
-    const c = LAYERS.map((spec) => layerPaint(spec, SKY).contrast);
-    expect(c[LAYERS.length - 1]).toBe(1);
-    for (let i = 1; i < c.length; i += 1) expect(c[i]).toBeGreaterThan(c[i - 1]);
-    // and it shows in the pixels: the lit/shadow difference is smaller on the farthest layer than the nearest
-    const gap = (li: number) => {
-      const cols = 700;
-      const d = bake(params(li, 0, cols));
-      const slope = (x: number) => (solidRow(d, cols, x - 1) - solidRow(d, cols, x + 1)) / 2;
-      const avg = (pick: (s: number) => boolean) => {
-        const xs = Array.from({ length: cols - 4 }, (_, k) => k + 2).filter((x) => pick(slope(x)));
-        return (
-          xs.reduce((a, x) => a + lum(d, cols, x, solidRow(d, cols, x) + 12), 0) /
-          Math.max(1, xs.length)
-        );
-      };
-      return (
-        Math.abs(avg((s) => s < -0.8) - avg((s) => s > 0.8)) /
-        Math.max(
-          1,
-          avg(() => true)
-        )
-      );
-    };
-    expect(gap(0)).toBeLessThan(gap(3));
-  });
-});
diff --git a/src/app/features/scene/ridge/ridgeBake.ts b/src/app/features/scene/ridge/ridgeBake.ts
deleted file mode 100644
index 3d47526c..00000000
--- a/src/app/features/scene/ridge/ridgeBake.ts
+++ /dev/null
@@ -1,139 +0,0 @@
-/* eslint-disable no-param-reassign -- `bakeSlice` fills the caller's pixel buffer */
-// The pixels of a ridge chunk, as a pure function: no DOM, no canvas. Each column is lit from the
-// slope of the heightfield's crest line against the sun; the face under it takes a light-to-haze
-// gradient, erosion streaks and a lit rim on the crest. The depth treatment (colour, haze, contrast
-// by distance) is ridgeWorld's `layerColour`, `hazeColour` and `transmittance`, used here and not redone.
-import { gullyAt, LayerSpec, profile, hazeColour, layerColour, transmittance } from './ridgeWorld';
-import type { SkyColours, Srgb } from './skyColour';
-
-export type Vec3 = readonly [number, number, number];
-
-/** Unit vector toward the sun: x across the screen (from the azimuth), y up, z toward the viewer. */
-export function sunDirection(sky: SkyColours): Vec3 {
-  const az = sky.sunAzimuth ?? 0.3;
-  const x = 0.9 * Math.sin(2 * Math.PI * az);
-  const l = Math.hypot(x, 0.35, 0.45);
-  return [x / l, 0.35 / l, 0.45 / l];
-}
-
-/** How steeply the crest's slope tilts the face's normal sideways. */
-const TILT = 1.2;
-
-/**
- * Sun light on the face under a crest whose silhouette has `slope` (rows per column, positive when the
- * crest rises toward +x, so the face looks toward -x). 0 in full shadow .. 1 head-on to the sun.
- */
-export function faceLight(slope: number, sun: Vec3): number {
-  const nx = -slope * TILT;
-  const inv = 1 / Math.hypot(nx, 0.55, 0.85);
-  const d = (nx * sun[0] + 0.55 * sun[1] + 0.85 * sun[2]) * inv;
-  return Math.min(1, Math.max(0, (d - 0.2) / 0.7));
-}
-
-export interface BakeParams {
-  spec: LayerSpec;
-  sky: SkyColours;
-  /** Pixels in one viewport width: the unit of world-x. */
-  period: number;
-  /** CSS px to canvas px. */
-  scale: number;
-  /** Viewport height in canvas px. */
-  viewH: number;
-  /** Rows of the pixel buffer (the band plus any padding below it). */
-  rows: number;
-  /** Row count of the visible band; the crest is measured from the top of it. */
-  bandH: number;
-  /** World pixel of the buffer's column 0 (may be fractional-free negative: a chunk's left minus its padding). */
-  px0: number;
-  /** Columns of the buffer. */
-  cols: number;
-}
-
-const clamp01 = (v: number): number => Math.min(1, Math.max(0, v));
-const smoothstep = (a: number, b: number, v: number): number => {
-  const t = clamp01((v - a) / (b - a));
-  return t * t * (3 - 2 * t);
-};
-const SUN_WHITE: Srgb = [255, 238, 205];
-
-/** Everything `bakeSlice` needs per layer, computed once. */
-export interface LayerPaint {
-  base: Srgb;
-  haze: Srgb;
-  warm: Srgb;
-  contrast: number;
-  sun: Vec3;
-}
-
-export function layerPaint(spec: LayerSpec, sky: SkyColours): LayerPaint {
-  const warm: Srgb = [
-    (sky.horizon[0] + SUN_WHITE[0]) / 2,
-    (sky.horizon[1] + SUN_WHITE[1]) / 2,
-    (sky.horizon[2] + SUN_WHITE[2]) / 2,
-  ];
-  return {
-    base: layerColour(spec, sky),
-    haze: hazeColour(sky),
-    warm,
-    // Distance flattens relief: the same transmittance that thins the colour.
-    contrast: 0.35 + 0.65 * transmittance(spec),
-    sun: sunDirection(sky),
-  };
-}
-
-/** Crest row (float, from the top of the band) of every buffer column from c0 - 1 to c1 (inclusive). */
-function crestRows(p: BakeParams, c0: number, c1: number): Float64Array {
-  const out = new Float64Array(c1 - c0 + 2);
-  const amp = p.spec.relief * p.viewH;
-  const lift = p.spec.base * p.viewH;
-  for (let c = c0 - 1; c <= c1; c += 1) {
-    const top = Math.min(p.bandH, lift + amp * profile(p.spec, (p.px0 + c) / p.period));
-    out[c - c0 + 1] = p.bandH - top;
-  }
-  return out;
-}
-
-/**
- * Paint columns [c0, c1) of the chunk into `out` (RGBA, `p.cols` wide, `p.rows` tall, zeroed). One
- * call is a slice of a chunk, so a caller can keep each task short. Seams are exact: a column's pixels
- * depend only on its world pixel, never on where the slice or chunk begins.
- */
-export function bakeSlice(
-  out: Uint8ClampedArray,
-  p: BakeParams,
-  paint: LayerPaint,
-  c0: number,
-  c1: number
-): void {
-  const { spec } = p;
-  const crest = crestRows(p, c0, c1);
-  const faceH = 0.45 * p.viewH;
-  const rim = 2.2 * p.scale;
-  const { base, haze, warm, contrast, sun } = paint;
-  for (let c = c0; c < c1; c += 1) {
-    const cy = crest[c - c0 + 1];
-    const slope = (crest[c - c0 + 2] - crest[c - c0]) * -0.5; // rows up per column
-    const lit = faceLight(slope, sun);
-    const steep = 0.45 + 0.55 * clamp01(Math.abs(slope) * 0.8);
-    const gl = gullyAt(spec, (p.px0 + c) / p.scale) * steep;
-    const y0 = Math.max(0, Math.floor(cy));
-    for (let y = y0; y < p.rows; y += 1) {
-      const d = y + 0.5 - cy;
-      const dn = clamp01(d / faceH);
-      const cover = clamp01(y + 1 - cy);
-      const gully = spec.gully * gl * smoothstep(0, 0.2, dn);
-      // Shade the ground colour by the sun; the lit warm light fades down the face and in the gullies.
-      const shade = (0.7 + 0.3 * lit * contrast + 0.3 * (1 - contrast)) * (1 - 0.5 * gully);
-      const warmK = 0.22 * contrast * lit * lit * (1 - 0.7 * dn) * (1 - 0.6 * gully);
-      const rimK = clamp01(1 - d / rim) * contrast * (0.3 + 0.7 * lit) * 0.6;
-      const mist = spec.mist * smoothstep(0, 1, dn);
-      const o = (y * p.cols + c) * 4;
-      for (let i = 0; i < 3; i += 1) {
-        let v = base[i] * shade + warm[i] * (warmK + rimK);
-        v += (haze[i] - v) * mist;
-        out[o + i] = v;
-      }
-      out[o + 3] = cover * 255;
-    }
-  }
-}
diff --git a/src/app/features/scene/ridge/ridgeWorld.ts b/src/app/features/scene/ridge/ridgeWorld.ts
index 569b43bd..048d1b50 100644
--- a/src/app/features/scene/ridge/ridgeWorld.ts
+++ b/src/app/features/scene/ridge/ridgeWorld.ts
@@ -1,137 +1,39 @@
 // Every number of the ridge scene, and the pure functions that turn them into silhouettes. No DOM.
-// A ridge is a function of world-x (t, in viewport widths): ridged multifractal noise, domain-warped,
-// one function for every layer with the parameters below. Nothing in it repeats.
-import { valueNoise } from './noise';
+import { fbmPeriodic, FbmShape } from './noise';
 import type { Srgb, SkyColours } from './skyColour';
 
 export interface LayerSpec {
   /** 0 farthest. Also the noise row, so layers never share a profile. */
   index: number;
-  /** Lattice cells per viewport width for the first octave; each octave multiplies it by LACUNARITY. */
+  /** Lattice cells across one period for the first octave; the fbm octaves scale it by `lacunarity`. */
   baseCells: number;
-  /** Peak-to-valley height of the silhouette, as a fraction of the viewport height. */
+  /** Peak-to-valley height of the silhouette, as a fraction of the layer band. */
   relief: number;
-  /** 0 rounded hills .. 1 sharp crags: how tightly each octave is folded at its crest. */
+  /** 0 hills (plain fbm) .. 1 crags (ridged: 1 - |2n - 1|). */
   crag: number;
   /** Ridge top at its lowest point, fraction of the viewport height up from the bottom. */
   base: number;
   /** 0 = the layer is the horizon haze, 1 = the nearest ground colour. */
   depth: number;
-  /** Seconds for the layer to drift one viewport width. Farther layers are slower. */
+  /** Seconds for the layer to drift one period. Farther layers are slower. */
   seconds: number;
-  /** Octaves of the ridged multifractal; the bake cost is linear in it. */
-  octaves: number;
-  /** Domain warp, in cells of the first octave. */
-  warp: number;
-  /** 0..1 depth of the erosion streaks down the face. */
-  gully: number;
-  /** Width of one gully, CSS px. */
-  gullyPx: number;
-  /** 0..1 how far the foot of the face dissolves into the valley mist. */
-  mist: number;
 }
 
-/** Four layers: one function, four parameter rows. */
+/** Four layers. `lacunarity` 2 with these base cell counts keeps every octave an integer. */
 export const LAYERS: readonly LayerSpec[] = [
-  {
-    index: 0,
-    baseCells: 2.2,
-    relief: 0.24,
-    crag: 0.85,
-    base: 0.34,
-    depth: 0.12,
-    seconds: 420,
-    octaves: 5,
-    warp: 0.6,
-    gully: 0.3,
-    gullyPx: 16,
-    mist: 0.35,
-  },
-  {
-    index: 1,
-    baseCells: 3.0,
-    relief: 0.2,
-    crag: 0.7,
-    base: 0.26,
-    depth: 0.38,
-    seconds: 300,
-    octaves: 5,
-    warp: 0.55,
-    gully: 0.5,
-    gullyPx: 20,
-    mist: 0.3,
-  },
-  {
-    index: 2,
-    baseCells: 3.8,
-    relief: 0.16,
-    crag: 0.5,
-    base: 0.17,
-    depth: 0.66,
-    seconds: 210,
-    octaves: 5,
-    warp: 0.5,
-    gully: 0.6,
-    gullyPx: 24,
-    mist: 0.22,
-  },
-  {
-    index: 3,
-    baseCells: 4.6,
-    relief: 0.12,
-    crag: 0.3,
-    base: 0.08,
-    depth: 1,
-    seconds: 150,
-    octaves: 4,
-    warp: 0.45,
-    gully: 0.7,
-    gullyPx: 30,
-    mist: 0.16,
-  },
+  { index: 0, baseCells: 3, relief: 0.24, crag: 0.8, base: 0.34, depth: 0.12, seconds: 420 },
+  { index: 1, baseCells: 4, relief: 0.2, crag: 0.55, base: 0.26, depth: 0.38, seconds: 300 },
+  { index: 2, baseCells: 5, relief: 0.16, crag: 0.3, base: 0.17, depth: 0.66, seconds: 210 },
+  { index: 3, baseCells: 6, relief: 0.12, crag: 0.1, base: 0.08, depth: 1, seconds: 150 },
 ];
 
-/** Not an integer power of two, so no octave's lattice lines up with another's. */
-export const LACUNARITY = 2.07;
-/** Each octave is weighted by the previous octave's folded signal, times this, clamped to 1. */
-export const WEIGHT_GAIN = 2;
-const AMP_GAIN = 0.5;
-/** Calibration: the weighted sum's typical top is about 1 / this. */
-const PEAK_NORM = 1.25;
+export const FBM: FbmShape = { octaves: 5, lacunarity: 2, gain: 0.5 };
 
-/** Silhouette height in [0, 1] at world-x `t` (viewport widths); defined for every real t. */
+/** Silhouette height in [0, 1] at `t` (0..1 across one period); periodic in t. */
 export function profile(spec: LayerSpec, t: number): number {
-  const row = spec.index * 101;
-  const wt =
-    t + (spec.warp * (2 * valueNoise(t * spec.baseCells * 0.7, row + 97) - 1)) / spec.baseCells;
-  const e = 0.03 + (1 - spec.crag) * 0.4;
-  const top = Math.sqrt(1 + e * e);
-  let sum = 0;
-  let norm = 0;
-  let amp = 1;
-  let f = spec.baseCells;
-  let w = 1;
-  for (let k = 0; k < spec.octaves; k += 1) {
-    const v = 2 * valueNoise(wt * f, row + k * 13) - 1;
-    // Fold: 1 at the zero crossing of the noise, 0 at its extremes; `e` rounds the crease.
-    let sig = 1 - Math.sqrt(v * v + e * e) / top;
-    sig *= sig;
-    sig *= w;
-    w = Math.min(1, sig * WEIGHT_GAIN);
-    sum += sig * amp;
-    norm += amp;
-    amp *= AMP_GAIN;
-    f *= LACUNARITY;
-  }
-  // A soft swell under the folds, so the valleys between sharp crests are not flat floors.
-  const swell = valueNoise(wt * spec.baseCells * 0.6, row + 211);
-  return Math.min(1, 0.85 * (sum / norm) * PEAK_NORM + 0.15 * swell);
-}
-
-/** Erosion streak strength in [0, 1] at world-x `wxCss` (CSS px): a folded noise at gully width. */
-export function gullyAt(spec: LayerSpec, wxCss: number): number {
-  const g = 1 - Math.abs(2 * valueNoise(wxCss / spec.gullyPx, spec.index * 131 + 5) - 1);
-  return g * g;
+  const n = fbmPeriodic(t, spec.index * 101, spec.baseCells, FBM);
+  const crag = 1 - Math.abs(2 * n - 1);
+  return n + (crag - n) * spec.crag;
 }
 
 /** The distance haze the far layers dissolve into: between the mid sky and the horizon, not the horizon glow itself. */
@@ -173,32 +75,32 @@ export function layerColour(spec: LayerSpec, sky: SkyColours): Srgb {
 export const edgeBlur = (spec: LayerSpec): number => AERIAL.blurPx * (1 - transmittance(spec));
 
 /**
- * Alpha of the warm sun-side in-scatter at world-x `t` (viewport widths). Zero when the sky has no
- * sun; grows with distance. The lobe is the product of two cosines with incommensurate wavelengths
- * (1.9 and 1.9 * golden ratio), so it is not periodic; its peaks are where the sun's azimuth puts them.
+ * Alpha of the warm sun-side in-scatter at `t` (0..1 across one period; periodic). Zero when the sky has
+ * no sun; grows with distance, peaks at the sun's azimuth.
  */
 export function scatterAlpha(spec: LayerSpec, sky: SkyColours, t: number): number {
   if (sky.sunAzimuth === undefined) return 0;
-  const a = 0.5 + 0.5 * Math.cos(2 * Math.PI * (t / 1.9 - sky.sunAzimuth));
-  const b = 0.75 + 0.25 * Math.cos((2 * Math.PI * t) / (1.9 * 1.618034));
-  return AERIAL.scatter * (1 - transmittance(spec)) * a * a * b;
+  const lobe = 0.5 + 0.5 * Math.cos(2 * Math.PI * (t - sky.sunAzimuth));
+  return AERIAL.scatter * (1 - transmittance(spec)) * lobe * lobe;
 }
 
-/** Chunk width as a multiple of the viewport width: room for the yaw sway on top of the viewport. */
-export const CHUNK_OVER = 1.2;
-
-/**
- * Integer pixel sizes for a viewport. `period` is one viewport width, the unit of world-x; a chunk
- * is `chunk` pixels of world, `height` the band a layer is painted in.
- */
+/** Integer pixel sizes of a layer for a viewport: one period wide, twice that painted, so a drift of one period loops. */
 export function layerSize(cssW: number, cssH: number, scale: number) {
   const period = Math.round(cssW * scale);
   const band = Math.round(cssH * scale * 0.6);
-  return { period, chunk: Math.round(period * CHUNK_OVER), height: band };
+  return { period, width: period * 2, height: band };
 }
 
-/** Ridge-top y (canvas pixels, from the top of the layer's band) at world-x `t` (viewport widths). */
-export function ridgeY(spec: LayerSpec, t: number, bandH: number, viewH: number): number {
-  const topFromBottom = spec.base * viewH + spec.relief * viewH * profile(spec, t);
+/** Ridge-top y (canvas pixels, from the top of the layer's band) for pixel column x. */
+export function ridgeY(
+  spec: LayerSpec,
+  x: number,
+  period: number,
+  bandH: number,
+  viewH: number
+): number {
+  const amp = spec.relief * viewH;
+  const bottomOffset = spec.base * viewH; // lowest the top sits above the viewport bottom
+  const topFromBottom = bottomOffset + amp * profile(spec, (x % period) / period);
   return bandH - Math.min(bandH, topFromBottom);
 }
diff --git a/src/app/features/scene/skyInk.test.ts b/src/app/features/scene/skyInk.test.ts
index 3a583090..4cf2a6c4 100644
--- a/src/app/features/scene/skyInk.test.ts
+++ b/src/app/features/scene/skyInk.test.ts
@@ -7,10 +7,8 @@ import type { FixedSkyState } from './skyBand';
 import {
   LIGHTEST_PATCH,
   NIGHT_INK_MAX_L,
-  NOTICE_GROUND,
   inkForState,
   labelInk,
-  noticeInk,
   sceneInk,
   userColorInk,
 } from './skyInk';
@@ -177,28 +175,3 @@ describe('labelInk', () => {
     expect(hueGap(dark, ink)).toBeLessThan(2);
   });
 });
-
-describe('noticeInk', () => {
-  const ratio = (a: number, b: number) => (Math.max(a, b) + 0.05) / (Math.min(a, b) + 0.05);
-
-  it('is light enough to clear AA on the dark ridge wherever the theme ink does not', () => {
-    (['day', 'dusk'] as FixedSkyState[]).forEach((state) => {
-      const ink = noticeInk({ state, phone: true }) as string;
-      expect(ratio(luminance(ink), NOTICE_GROUND)).toBeGreaterThanOrEqual(AA);
-      // the dark theme ink it replaces does not
-      expect(
-        ratio(luminance(baked.noonday.tokens.SurfaceVariant.OnContainer), NOTICE_GROUND)
-      ).toBeLessThan(AA);
-    });
-  });
-
-  it('leaves night (already light) and every desktop state to the theme', () => {
-    expect(noticeInk({ state: 'night', phone: true })).toBeUndefined();
-    (['day', 'dusk', 'night'] as FixedSkyState[]).forEach((state) =>
-      expect(noticeInk({ state, phone: false })).toBeUndefined()
-    );
-    expect(
-      ratio(luminance(baked.midnight.tokens.SurfaceVariant.OnContainer), NOTICE_GROUND)
-    ).toBeGreaterThanOrEqual(AA);
-  });
-});
diff --git a/src/app/features/scene/skyInk.ts b/src/app/features/scene/skyInk.ts
index b7a3667f..7219159c 100644
--- a/src/app/features/scene/skyInk.ts
+++ b/src/app/features/scene/skyInk.ts
@@ -93,20 +93,3 @@ export function userColorInk(userId: string, ink: SkyInk): string {
  */
 export const labelInk = ({ state, phone }: SkyInk): string | undefined =>
   state === 'dusk' && phone ? '#29221a' : undefined;
-
-/**
- * WCAG relative luminance of the lightest pixel under the notice line above the composer on a phone: the dark
- * foreground ridge, the same in every state (measured 2026-11-10 from the Starfire phone shots at 390x844,
- * ratatoskr-dev-preview/phone-room-{day,dusk,night}.png, text region x 15-355 CSS px: median 0.0052, 90th percentile
- * 0.0089, rounded up to 0.01). The labelInk patches above are the lightest terrain behind the timeline; here the
- * ground is dark, so the ink must be light.
- */
-export const NOTICE_GROUND = 0.01;
-
-/**
- * The ink of the training-notice line above the composer where the theme's own does not clear AA there. On a phone the
- * line sits on the dark ridge in every state, but Noonday (day, dusk) wears dark ink, 1.2:1 at dusk by the numbers
- * above; Midnight's (night) is already light and stays (undefined). Desktop is unmeasured and stays.
- */
-export const noticeInk = ({ state, phone }: SkyInk): string | undefined =>
-  phone && state !== 'night' ? baked.midnight.tokens.SurfaceVariant.OnContainer : undefined;
diff --git a/src/app/hooks/useClientConfig.test.ts b/src/app/hooks/useClientConfig.test.ts
deleted file mode 100644
index 440ba15c..00000000
--- a/src/app/hooks/useClientConfig.test.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { ClientConfig, clientDefaultServer } from './useClientConfig';
-import config from '../../../config.json';
-
-describe('default homeserver', () => {
-  it('is gamecult.org when the config names none', () => {
-    expect(clientDefaultServer({})).toBe('gamecult.org');
-    expect(clientDefaultServer({ homeserverList: [] })).toBe('gamecult.org');
-  });
-
-  it('is the listed server the config points at', () => {
-    expect(
-      clientDefaultServer({ homeserverList: ['chat.gamecult.org'], defaultHomeserver: 0 })
-    ).toBe('chat.gamecult.org');
-  });
-
-  it('is gamecult.org in the repo config.json too', () => {
-    expect(clientDefaultServer(config as ClientConfig)).toBe('gamecult.org');
-  });
-});
diff --git a/src/app/hooks/useClientConfig.ts b/src/app/hooks/useClientConfig.ts
index feb38e0a..759e0c59 100644
--- a/src/app/hooks/useClientConfig.ts
+++ b/src/app/hooks/useClientConfig.ts
@@ -7,11 +7,6 @@ export type HashRouterConfig = {
   basename?: string;
 };
 
-export type RegistrationConfig = {
-  enabled?: boolean;
-  url?: string;
-};
-
 export type ClientConfig = {
   defaultHomeserver?: number;
   homeserverList?: string[];
@@ -31,13 +26,6 @@ export type ClientConfig = {
   // Per-Mind notification earcons (src/app/features/dings). Off unless `enabled: true`.
   dings?: DingsConfig;
 
-  // Rooms (ids or aliases) shown as the album view; a room whose create type is org.gamecult.file_zone needs no entry.
-  fileZoneRooms?: string[];
-
-  // The sign-up entry on the sign-in page. Off unless `enabled` is true; `url` is the account
-  // service's own registration page (a value, never a route this client invents).
-  registration?: RegistrationConfig;
-
   // Dev preview only: the build answers a pretend homeserver in-page (src/preview-demo).
   previewDemo?: boolean;
 };
@@ -53,7 +41,7 @@ export function useClientConfig(): ClientConfig {
 }
 
 export const clientDefaultServer = (clientConfig: ClientConfig): string =>
-  clientConfig.homeserverList?.[clientConfig.defaultHomeserver ?? 0] ?? 'gamecult.org';
+  clientConfig.homeserverList?.[clientConfig.defaultHomeserver ?? 0] ?? 'matrix.org';
 
 export const clientAllowedServer = (clientConfig: ClientConfig, server: string): boolean => {
   const { homeserverList, allowCustomHomeservers } = clientConfig;
diff --git a/src/app/pages/Router.tsx b/src/app/pages/Router.tsx
index cee6ccc7..159162dd 100644
--- a/src/app/pages/Router.tsx
+++ b/src/app/pages/Router.tsx
@@ -9,13 +9,15 @@ import {
 } from 'react-router-dom';
 
 import { ClientConfig } from '../hooks/useClientConfig';
-import { authRoutes } from './auth/authRoutes';
+import { AuthLayout, Login, Register, ResetPassword } from './auth';
 import {
   DIRECT_PATH,
-  DESK_PATH,
   EXPLORE_PATH,
   HOME_PATH,
+  LOGIN_PATH,
   INBOX_PATH,
+  REGISTER_PATH,
+  RESET_PASSWORD_PATH,
   SPACE_PATH,
   _CREATE_PATH,
   _FEATURED_PATH,
@@ -46,7 +48,6 @@ import { Notifications, Inbox, Invites } from './client/inbox';
 import { setAfterLoginRedirectPath } from './afterLoginRedirectPath';
 import { Room } from '../features/room';
 import { Lobby } from '../features/lobby';
-import { Desk } from '../features/desk';
 import { WelcomePage } from './client/WelcomePage';
 import { EstatePageNav } from './client/EstatePageNav';
 import { PageRoot } from '../components/page';
@@ -54,7 +55,7 @@ import { ScreenSize } from '../hooks/useScreenSize';
 import { MobileFriendlyPageNav } from './MobileFriendly';
 import { ClientInitStorageAtom } from './client/ClientInitStorageAtom';
 import { ClientNonUIFeatures } from './client/ClientNonUIFeatures';
-import { AuthRouteThemeManager } from './ThemeManager';
+import { AuthRouteThemeManager, UnAuthRouteThemeManager } from './ThemeManager';
 import { ReceiveSelfDeviceVerification } from '../components/DeviceVerification';
 import { AutoRestoreBackupOnVerification } from '../components/BackupRestore';
 import { RoomSettingsRenderer } from '../features/room-settings';
@@ -85,7 +86,25 @@ export const createRouter = (clientConfig: ClientConfig, screenSize: ScreenSize)
           return redirect(getLoginPath());
         }}
       />
-      {authRoutes()}
+      <Route
+        loader={() => {
+          if (getFallbackSession()) {
+            return redirect(getHomePath());
+          }
+
+          return null;
+        }}
+        element={
+          <>
+            <AuthLayout />
+            <UnAuthRouteThemeManager />
+          </>
+        }
+      >
+        <Route path={LOGIN_PATH} element={<Login />} />
+        <Route path={REGISTER_PATH} element={<Register />} />
+        <Route path={RESET_PASSWORD_PATH} element={<ResetPassword />} />
+      </Route>
 
       <Route
         loader={() => {
@@ -227,15 +246,6 @@ export const createRouter = (clientConfig: ClientConfig, screenSize: ScreenSize)
           <Route path={_FEATURED_PATH} element={<FeaturedRooms />} />
           <Route path={_SERVER_PATH} element={<PublicRooms />} />
         </Route>
-        <Route
-          path={DESK_PATH}
-          element={
-            // The navigator shows beside the desk on wide screens; a phone shows the desk alone.
-            <PageRoot nav={<EstatePageNav path={HOME_PATH} />}>
-              <Desk />
-            </PageRoot>
-          }
-        />
         <Route path={CREATE_PATH} element={<Create />} />
         <Route
           path={INBOX_PATH}
diff --git a/src/app/pages/auth/RegisterEntry.tsx b/src/app/pages/auth/RegisterEntry.tsx
deleted file mode 100644
index e594c83c..00000000
--- a/src/app/pages/auth/RegisterEntry.tsx
+++ /dev/null
@@ -1,22 +0,0 @@
-import { Box, Text, color } from 'folds';
-import React from 'react';
-import { useClientConfig } from '../../hooks/useClientConfig';
-import { registrationEntry } from './registrationEntry';
-
-// Beside Sign in. Nothing renders unless the config switch is on; the consent sentence and its
-// version come from trainingNotice.ts, the same ones a room shows.
-export function RegisterEntry() {
-  const config = useClientConfig();
-  const entry = registrationEntry(config);
-  if (!entry) return null;
-  return (
-    <Box direction="Column" gap="100" alignItems="Center">
-      <Text align="Center">
-        Do not have an account? <a href={entry.url}>Register</a>
-      </Text>
-      <Text size="T200" align="Center" style={{ color: color.SurfaceVariant.OnContainer }}>
-        {entry.notice}
-      </Text>
-    </Box>
-  );
-}
diff --git a/src/app/pages/auth/SignedUp.tsx b/src/app/pages/auth/SignedUp.tsx
deleted file mode 100644
index 303e0d72..00000000
--- a/src/app/pages/auth/SignedUp.tsx
+++ /dev/null
@@ -1,54 +0,0 @@
-import { Box, Header, Scroll, Text } from 'folds';
-import classNames from 'classnames';
-import React from 'react';
-import { Link, Navigate } from 'react-router-dom';
-import { useClientConfig } from '../../hooks/useClientConfig';
-import { getLoginPath } from '../pathUtils';
-import { registrationEntry } from './registrationEntry';
-import { AuthFooter } from './AuthFooter';
-import * as css from './styles.css';
-import * as PatternsCss from '../../styles/Patterns.css';
-import RatatoskrSVG from '../../../../public/res/svg/ratatoskr.svg';
-import { LogoMark } from '../../components/logo/logoMark.css';
-
-// Where the account service sends a newcomer back. It promises nothing about mail or timing:
-// the sign-up page said what happens next, and this page points back to it. It has its own card
-// because AuthLayout looks up a homeserver first and sends paths it does not know to sign in.
-export function SignedUp() {
-  const config = useClientConfig();
-  if (!registrationEntry(config)) return <Navigate to={getLoginPath()} replace />;
-  return (
-    <Scroll variant="Background" visibility="Hover" size="300" hideTrack>
-      <Box
-        className={classNames(css.AuthLayout, PatternsCss.BackgroundDotPattern)}
-        direction="Column"
-        alignItems="Center"
-        justifyContent="SpaceBetween"
-        gap="400"
-      >
-        <Box direction="Column" className={css.AuthCard}>
-          <Header className={css.AuthHeader} size="600" variant="Surface">
-            <Box grow="Yes" direction="Row" gap="300" alignItems="Center">
-              <img
-                className={`${css.AuthLogo} ${LogoMark}`}
-                src={RatatoskrSVG}
-                alt="Ratatoskr logo"
-              />
-              <Text size="H3">Ratatoskr</Text>
-            </Box>
-          </Header>
-          <Box className={css.AuthCardContent} direction="Column" gap="500">
-            <Text size="H2" priority="400">
-              You signed up
-            </Text>
-            <Text>Follow the steps from the sign-up page to finish. Then sign in here.</Text>
-            <Text>
-              <Link to={getLoginPath()}>Sign in</Link>
-            </Text>
-          </Box>
-        </Box>
-        <AuthFooter />
-      </Box>
-    </Scroll>
-  );
-}
diff --git a/src/app/pages/auth/authMessages.ts b/src/app/pages/auth/authMessages.ts
index 4d9575a5..3cc858fe 100644
--- a/src/app/pages/auth/authMessages.ts
+++ b/src/app/pages/auth/authMessages.ts
@@ -57,14 +57,7 @@ export const serverTroubleMessage = (
 export const noSignInMethodMessage = (server: string): string =>
   `${server} does not offer a way to sign in that this app can use. Pick another server from the Homeserver list, or tell whoever runs ${server}.`;
 
-export type RegisterTrouble =
-  | 'closed'
-  | 'rate-limited'
-  | 'invalid'
-  | 'unsupported'
-  | 'password-weak'
-  | 'password-short'
-  | 'unknown';
+export type RegisterTrouble = 'closed' | 'rate-limited' | 'invalid' | 'unsupported';
 
 export const registerTroubleMessage = (trouble: RegisterTrouble, server: string): string => {
   switch (trouble) {
@@ -74,12 +67,6 @@ export const registerTroubleMessage = (trouble: RegisterTrouble, server: string)
       return 'Too many tries in a short time. Wait a minute, then try again.';
     case 'invalid':
       return `${server} did not accept the request to make an account. Reload the page and try again; if it keeps failing, tell whoever invited you.`;
-    case 'password-weak':
-      return 'That password is too easy to guess. Pick a longer one, with more than one kind of character.';
-    case 'password-short':
-      return 'That password is too short. Pick a longer one.';
-    case 'unknown':
-      return `Something went wrong making the account on ${server}. Try again in a minute; if it keeps failing, tell whoever invited you.`;
     case 'unsupported':
     default:
       return `${server} asks for something this app cannot do when making an account. Tell whoever invited you.`;
diff --git a/src/app/pages/auth/authRoutes.tsx b/src/app/pages/auth/authRoutes.tsx
deleted file mode 100644
index c5ad101f..00000000
--- a/src/app/pages/auth/authRoutes.tsx
+++ /dev/null
@@ -1,40 +0,0 @@
-import React from 'react';
-import { Route, redirect } from 'react-router-dom';
-import { getFallbackSession } from '../../state/sessions';
-import { UnAuthRouteThemeManager } from '../ThemeManager';
-import { LOGIN_PATH, REGISTER_PATH, RESET_PASSWORD_PATH, SIGNED_UP_PATH } from '../paths';
-import { getHomePath } from '../pathUtils';
-import { AuthLayout } from './AuthLayout';
-import { Login } from './login';
-import { RegisterRoute } from './register/RegisterRoute';
-import { ResetPassword } from './reset-password';
-import { SignedUp } from './SignedUp';
-
-// The routes a signed-out visitor sees. The sign-up return page sits beside the layout, not in
-// it: the layout looks up a homeserver and sends any path it does not know to sign in.
-export const authRoutes = () => (
-  <>
-    <Route
-      loader={() => (getFallbackSession() ? redirect(getHomePath()) : null)}
-      element={
-        <>
-          <AuthLayout />
-          <UnAuthRouteThemeManager />
-        </>
-      }
-    >
-      <Route path={LOGIN_PATH} element={<Login />} />
-      <Route path={REGISTER_PATH} element={<RegisterRoute />} />
-      <Route path={RESET_PASSWORD_PATH} element={<ResetPassword />} />
-    </Route>
-    <Route
-      path={SIGNED_UP_PATH}
-      element={
-        <>
-          <SignedUp />
-          <UnAuthRouteThemeManager />
-        </>
-      }
-    />
-  </>
-);
diff --git a/src/app/pages/auth/index.ts b/src/app/pages/auth/index.ts
index 78910d5f..c4bd0476 100644
--- a/src/app/pages/auth/index.ts
+++ b/src/app/pages/auth/index.ts
@@ -1,5 +1,4 @@
 export * from './AuthLayout';
 export * from './login';
 export * from './register';
-export * from './SignedUp';
 export * from './reset-password';
diff --git a/src/app/pages/auth/login/Login.tsx b/src/app/pages/auth/login/Login.tsx
index ea08e4f0..bc3136f4 100644
--- a/src/app/pages/auth/login/Login.tsx
+++ b/src/app/pages/auth/login/Login.tsx
@@ -9,8 +9,6 @@ import { PasswordLoginForm } from './PasswordLoginForm';
 import { SSOLogin } from '../SSOLogin';
 import { TokenLogin } from './TokenLogin';
 import { OrDivider } from '../OrDivider';
-import { RegisterEntry } from '../RegisterEntry';
-import { registrationEntry } from '../registrationEntry';
 import { getLoginPath, getRegisterPath, withSearchParam } from '../../pathUtils';
 import { usePathWithOrigin } from '../../../hooks/usePathWithOrigin';
 import { LoginPathSearchParams } from '../../paths';
@@ -39,8 +37,7 @@ const useLoginSearchParams = (searchParams: URLSearchParams): LoginPathSearchPar
 
 export function Login() {
   const server = useAuthServer();
-  const config = useClientConfig();
-  const { hashRouter, previewDemo } = config;
+  const { hashRouter, previewDemo } = useClientConfig();
   const { loginFlows } = useAuthFlows();
   const [searchParams] = useSearchParams();
   const loginSearchParams = useLoginSearchParams(searchParams);
@@ -93,13 +90,9 @@ export function Login() {
           <span data-spacing-node />
         </>
       )}
-      {registrationEntry(config) ? (
-        <RegisterEntry />
-      ) : (
-        <Text align="Center">
-          Do not have an account? <Link to={getRegisterPath(server)}>Register</Link>
-        </Text>
-      )}
+      <Text align="Center">
+        Do not have an account? <Link to={getRegisterPath(server)}>Register</Link>
+      </Text>
     </Box>
   );
 }
diff --git a/src/app/pages/auth/register/PasswordRegisterForm.tsx b/src/app/pages/auth/register/PasswordRegisterForm.tsx
index cd01d021..99feed1a 100644
--- a/src/app/pages/auth/register/PasswordRegisterForm.tsx
+++ b/src/app/pages/auth/register/PasswordRegisterForm.tsx
@@ -30,15 +30,7 @@ import {
 import { useUIACompleted, useUIAFlow, useUIAParams } from '../../../hooks/useUIAFlows';
 import { AsyncState, AsyncStatus, useAsyncCallback } from '../../../hooks/useAsyncCallback';
 import { useAutoDiscoveryInfo } from '../../../hooks/useAutoDiscoveryInfo';
-import {
-  RegisterError,
-  RegisterResult,
-  register,
-  registerErrorTrouble,
-  useRegisterComplete,
-} from './registerUtil';
-import { registerTroubleMessage } from '../authMessages';
-import { useAuthServer } from '../../../hooks/useAuthServer';
+import { RegisterError, RegisterResult, register, useRegisterComplete } from './registerUtil';
 import { FieldError } from '../FiledError';
 import { TrainingNotice } from '../TrainingNotice';
 import {
@@ -193,7 +185,6 @@ export function PasswordRegisterForm({
   defaultEmail,
   defaultRegisterToken,
 }: PasswordRegisterFormProps) {
-  const server = useAuthServer();
   const serverDiscovery = useAutoDiscoveryInfo();
   const baseUrl = serverDiscovery['m.homeserver'].base_url;
   const mx = useMemo(() => createClient({ baseUrl }), [baseUrl]);
@@ -216,9 +207,6 @@ export function PasswordRegisterForm({
   const registerError =
     registerState.status === AsyncStatus.Error ? registerState.error : undefined;
 
-  // The password troubles show under the password field; the rest is the form's.
-  const registerTrouble = registerError && registerErrorTrouble(registerError.errcode);
-  const formTrouble = registerTrouble?.startsWith('password-') ? undefined : registerTrouble;
   useRegisterComplete(customRegisterResp);
 
   const handleSubmit: ChangeEventHandler<HTMLFormElement> = (evt) => {
@@ -310,10 +298,20 @@ export function PasswordRegisterForm({
                   required
                 />
                 {registerError?.errcode === RegisterError.PasswordWeak && (
-                  <FieldError message={registerTroubleMessage('password-weak', server)} />
+                  <FieldError
+                    message={
+                      registerError.data.error ??
+                      'Weak Password. Password rejected by server please choosing more strong Password.'
+                    }
+                  />
                 )}
                 {registerError?.errcode === RegisterError.PasswordShort && (
-                  <FieldError message={registerTroubleMessage('password-short', server)} />
+                  <FieldError
+                    message={
+                      registerError.data.error ??
+                      'Short Password. Password rejected by server please choosing more long Password.'
+                    }
+                  />
                 )}
               </Box>
               <Box direction="Column" gap="100">
@@ -380,7 +378,18 @@ export function PasswordRegisterForm({
             </Text>
           </Box>
         )}
-        {formTrouble && <FieldError message={registerTroubleMessage(formTrouble, server)} />}
+        {registerError?.errcode === RegisterError.RateLimited && (
+          <FieldError message="Failed to register. Your register request has been rate-limited by server, Please try after some time." />
+        )}
+        {registerError?.errcode === RegisterError.Forbidden && (
+          <FieldError message="Failed to register. The homeserver does not permit registration." />
+        )}
+        {registerError?.errcode === RegisterError.InvalidRequest && (
+          <FieldError message="Failed to register. Invalid request." />
+        )}
+        {registerError?.errcode === RegisterError.Unknown && (
+          <FieldError message={registerError.data.error ?? 'Failed to register. Unknown Reason.'} />
+        )}
         <span data-spacing-node />
         <TrainingNotice checked={trainingAck} onToggle={() => setTrainingAck((ack) => !ack)} />
         <Button variant="Primary" size="500" type="submit" disabled={!trainingAck}>
diff --git a/src/app/pages/auth/register/RegisterRoute.test.tsx b/src/app/pages/auth/register/RegisterRoute.test.tsx
deleted file mode 100644
index 043c1174..00000000
--- a/src/app/pages/auth/register/RegisterRoute.test.tsx
+++ /dev/null
@@ -1,37 +0,0 @@
-import React from 'react';
-import { describe, expect, it, vi } from 'vitest';
-import { renderToString } from 'react-dom/server';
-import { ClientConfigProvider } from '../../../hooks/useClientConfig';
-import type { ClientConfig } from '../../../hooks/useClientConfig';
-import { RegisterRoute } from './RegisterRoute';
-
-// The in-client form needs a homeserver; the route test only needs to know whether it was asked for.
-vi.mock('./Register', () => ({ Register: () => <div>in-client register form</div> }));
-
-const render = (config: ClientConfig) =>
-  renderToString(
-    <ClientConfigProvider value={config}>
-      <RegisterRoute />
-    </ClientConfigProvider>
-  );
-
-describe('the /register route', () => {
-  it('with the switch on offers only the account service link, not the in-client form', () => {
-    const html = render({ registration: { enabled: true, url: 'https://accounts.example/join' } });
-    expect(html).toContain('href="https://accounts.example/join"');
-    expect(html).not.toContain('in-client register form');
-  });
-
-  it('with the switch off shows the in-client form', () => {
-    expect(render({ registration: { enabled: false, url: 'https://accounts.example/join' } })).toContain(
-      'in-client register form'
-    );
-    expect(render({})).toContain('in-client register form');
-  });
-
-  it('with the switch on but an unusable url falls back to the form', () => {
-    expect(render({ registration: { enabled: true, url: 'ftp://accounts.example/join' } })).toContain(
-      'in-client register form'
-    );
-  });
-});
diff --git a/src/app/pages/auth/register/RegisterRoute.tsx b/src/app/pages/auth/register/RegisterRoute.tsx
deleted file mode 100644
index 094bc8fd..00000000
--- a/src/app/pages/auth/register/RegisterRoute.tsx
+++ /dev/null
@@ -1,26 +0,0 @@
-import { Box, Text } from 'folds';
-import React, { useEffect } from 'react';
-import { useClientConfig } from '../../../hooks/useClientConfig';
-import { registrationEntry } from '../registrationEntry';
-import { Register } from './Register';
-
-// With the Register switch on, a stranger gets one way to register: the account service's own
-// page. This route sends them there (the link stays for when the redirect does not run). With
-// the switch off, the in-client form is the way.
-export function RegisterRoute() {
-  const entry = registrationEntry(useClientConfig());
-  useEffect(() => {
-    if (entry) window.location.replace(entry.url);
-  }, [entry]);
-  if (!entry) return <Register />;
-  return (
-    <Box direction="Column" gap="300">
-      <Text size="H2" priority="400">
-        Register
-      </Text>
-      <Text>
-        Sign-up happens on the account page. <a href={entry.url}>Continue to sign up</a>
-      </Text>
-    </Box>
-  );
-}
diff --git a/src/app/pages/auth/register/registerErrors.test.ts b/src/app/pages/auth/register/registerErrors.test.ts
deleted file mode 100644
index e9474e8f..00000000
--- a/src/app/pages/auth/register/registerErrors.test.ts
+++ /dev/null
@@ -1,39 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { registerTroubleMessage } from '../authMessages';
-import { RegisterError, registerErrorTrouble } from './registerUtil';
-
-// What the form shows for a failed registration, from the error code the server answered with.
-const shown = (errcode: string) => {
-  const trouble = registerErrorTrouble(errcode);
-  return trouble && registerTroubleMessage(trouble, 'chat.example');
-};
-
-describe('registration failures as the form shows them', () => {
-  it('say what to do next for every failure that is not a username field error', () => {
-    [
-      RegisterError.PasswordWeak,
-      RegisterError.PasswordShort,
-      RegisterError.RateLimited,
-      RegisterError.Forbidden,
-      RegisterError.InvalidRequest,
-      RegisterError.Unknown,
-    ].forEach((e) => expect(shown(e)?.length).toBeGreaterThan(20));
-  });
-
-  it('never carry the server text or a Matrix error code', () => {
-    Object.values(RegisterError).forEach((e) => {
-      expect(shown(e) ?? '').not.toMatch(/M_[A-Z_]+|errcode|homeserver does not/i);
-    });
-  });
-
-  it('leave the username errors to their own field messages', () => {
-    [RegisterError.UserTaken, RegisterError.UserInvalid, RegisterError.UserExclusive].forEach((e) =>
-      expect(shown(e)).toBeUndefined()
-    );
-  });
-
-  it('tell a closed server from a rate limit', () => {
-    expect(shown(RegisterError.Forbidden)).toContain('chat.example');
-    expect(shown(RegisterError.RateLimited)).not.toBe(shown(RegisterError.Forbidden));
-  });
-});
diff --git a/src/app/pages/auth/register/registerUtil.ts b/src/app/pages/auth/register/registerUtil.ts
index 02f530fb..86a38cb5 100644
--- a/src/app/pages/auth/register/registerUtil.ts
+++ b/src/app/pages/auth/register/registerUtil.ts
@@ -17,7 +17,6 @@ import {
 import { getHomePath, getLoginPath, withSearchParam } from '../../pathUtils';
 import { getMxIdLocalPart, getMxIdServer } from '../../../utils/matrix';
 import { setFallbackSession } from '../../../state/sessions';
-import type { RegisterTrouble } from '../authMessages';
 
 export enum RegisterError {
   UserTaken = 'UserTaken',
@@ -31,27 +30,6 @@ export enum RegisterError {
   Unknown = 'Unknown',
 }
 
-// The form-level words for a failed registration, never the server's own text. The username
-// errors are the form's own field messages and have no trouble here.
-export const registerErrorTrouble = (errcode: string): RegisterTrouble | undefined => {
-  switch (errcode) {
-    case RegisterError.PasswordWeak:
-      return 'password-weak';
-    case RegisterError.PasswordShort:
-      return 'password-short';
-    case RegisterError.RateLimited:
-      return 'rate-limited';
-    case RegisterError.Forbidden:
-      return 'closed';
-    case RegisterError.InvalidRequest:
-      return 'invalid';
-    case RegisterError.Unknown:
-      return 'unknown';
-    default:
-      return undefined;
-  }
-};
-
 export type CustomRegisterResponse = {
   baseUrl: string;
   response: RegisterResponse;
diff --git a/src/app/pages/auth/registrationEntry.test.ts b/src/app/pages/auth/registrationEntry.test.ts
deleted file mode 100644
index 53b15fb7..00000000
--- a/src/app/pages/auth/registrationEntry.test.ts
+++ /dev/null
@@ -1,57 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { registrationEntry } from './registrationEntry';
-import type { ClientConfig } from '../../hooks/useClientConfig';
-import {
-  PREVIEW_NOTICE_TEXT,
-  TRAINING_NOTICE_TEXT,
-  TRAINING_NOTICE_VERSION,
-} from '../../utils/trainingNotice';
-import config from '../../../../config.json';
-
-const url = 'https://accounts.example/register';
-
-describe('registration entry', () => {
-  it('is hidden when the switch is absent or off', () => {
-    expect(registrationEntry({})).toBeUndefined();
-    expect(registrationEntry({ registration: { url } })).toBeUndefined();
-    expect(registrationEntry({ registration: { enabled: false, url } })).toBeUndefined();
-  });
-
-  it('ships off in config.json', () => {
-    expect(registrationEntry(config as ClientConfig)).toBeUndefined();
-    expect(config.registration.enabled).toBe(false);
-  });
-
-  it('is hidden when the switch is on but the url is no web address', () => {
-    expect(registrationEntry({ registration: { enabled: true } })).toBeUndefined();
-    expect(registrationEntry({ registration: { enabled: true, url: '' } })).toBeUndefined();
-    expect(
-      registrationEntry({ registration: { enabled: true, url: '/register' } })
-    ).toBeUndefined();
-    expect(
-      registrationEntry({ registration: { enabled: true, url: 'data:text/html,x' } })
-    ).toBeUndefined();
-  });
-
-  it('reads the consent text and version from trainingNotice.ts', () => {
-    expect(registrationEntry({ registration: { enabled: true, url } })).toEqual({
-      url,
-      notice: TRAINING_NOTICE_TEXT,
-      noticeVersion: TRAINING_NOTICE_VERSION,
-    });
-  });
-
-  it('says the pretend sentence on the pretend server', () => {
-    const entry = registrationEntry({ previewDemo: true, registration: { enabled: true, url } });
-    expect(entry?.notice).toBe(PREVIEW_NOTICE_TEXT);
-  });
-
-  it('accepts http only for a local development host', () => {
-    const on = (u: string) => registrationEntry({ registration: { enabled: true, url: u } });
-    expect(on('http://localhost:8080/register')?.url).toBe('http://localhost:8080/register');
-    expect(on('http://127.0.0.1:8080/register')).toBeDefined();
-    expect(on('http://accounts.example/register')).toBeUndefined();
-    expect(on('http://localhost.evil.example/register')).toBeUndefined();
-    expect(on('https://accounts.example/register')).toBeDefined();
-  });
-});
diff --git a/src/app/pages/auth/registrationEntry.ts b/src/app/pages/auth/registrationEntry.ts
deleted file mode 100644
index 6c65732e..00000000
--- a/src/app/pages/auth/registrationEntry.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-import type { ClientConfig } from '../../hooks/useClientConfig';
-import { TRAINING_NOTICE_VERSION, trainingNoticeText } from '../../utils/trainingNotice';
-
-export type RegistrationEntry = { url: string; notice: string; noticeVersion: number };
-
-// Plain http is for a developer's own machine only; a stranger's sign-up page is https.
-const isLocalHost = (hostname: string): boolean =>
-  hostname === 'localhost' ||
-  hostname.endsWith('.localhost') ||
-  hostname === '127.0.0.1' ||
-  hostname === '[::1]';
-
-/**
- * The sign-up entry the sign-in page may show: the account service's registration page, when the
- * switch is on and the configured url is an https address (http only for localhost). Anything else is no entry. The
- * consent sentence and its version are trainingNotice.ts's, the ones a room shows.
- */
-export const registrationEntry = (config: ClientConfig): RegistrationEntry | undefined => {
-  const { enabled, url } = config.registration ?? {};
-  if (enabled !== true || typeof url !== 'string') return undefined;
-  try {
-    const { protocol, hostname } = new URL(url);
-    if (protocol !== 'https:' && !(protocol === 'http:' && isLocalHost(hostname))) return undefined;
-  } catch {
-    return undefined;
-  }
-  return {
-    url,
-    notice: trainingNoticeText(config.previewDemo),
-    noticeVersion: TRAINING_NOTICE_VERSION,
-  };
-};
diff --git a/src/app/pages/auth/styles.css.ts b/src/app/pages/auth/styles.css.ts
index e762207b..5b6b6588 100644
--- a/src/app/pages/auth/styles.css.ts
+++ b/src/app/pages/auth/styles.css.ts
@@ -1,6 +1,5 @@
 import { globalStyle, style } from '@vanilla-extract/css';
 import { DefaultReset, color, config, toRem } from 'folds';
-import { MOBILE_BREAKPOINT } from '../../hooks/useScreenSize';
 import { FOOTER_TINT, PLATE_TINT } from '../../features/scene/skyPlate';
 
 export const AuthLayout = style({
@@ -128,15 +127,3 @@ globalStyle(`${scene} ${AuthFooter}`, {
 globalStyle(`${scene} ${AuthFooter} a`, {
   color: 'var(--sky-bubble-text, #b7c7d9)',
 });
-
-// Phone tap targets for the sign-in links, hit area only (every link is under 44 px tall: Forget Password? 16,
-// Register 20, the footer's 22): vertical padding grows each link's box and the negative margin takes the growth
-// back out of the layout, so nothing moves and nothing is drawn. An inline link ignores the margin and its padding
-// never moves a line, which is the same result.
-const SCREEN_PHONE = `screen and (max-width: ${MOBILE_BREAKPOINT}px)`;
-globalStyle(`${AuthCard} a`, {
-  '@media': { [SCREEN_PHONE]: { paddingBlock: 14, marginBlock: -14 } },
-});
-globalStyle(`${AuthFooter} a`, {
-  '@media': { [SCREEN_PHONE]: { paddingBlock: 11, marginBlock: -11 } },
-});
diff --git a/src/app/pages/pathUtils.ts b/src/app/pages/pathUtils.ts
index 2738c4c9..817d21d1 100644
--- a/src/app/pages/pathUtils.ts
+++ b/src/app/pages/pathUtils.ts
@@ -23,7 +23,6 @@ import {
   SPACE_ROOM_PATH,
   SPACE_SEARCH_PATH,
   CREATE_PATH,
-  DESK_PATH,
 } from './paths';
 import { trimLeadingSlash, trimTrailingSlash } from '../utils/common';
 import { HashRouterConfig } from '../hooks/useClientConfig';
@@ -154,9 +153,6 @@ export const getExploreServerPath = (server: string): string => {
   return generatePath(EXPLORE_SERVER_PATH, params);
 };
 
-export const getDeskPath = (mind: string): string =>
-  generatePath(DESK_PATH, { mind: encodeURIComponent(mind) });
-
 export const getCreatePath = (): string => CREATE_PATH;
 
 export const getInboxPath = (): string => INBOX_PATH;
diff --git a/src/app/pages/paths.ts b/src/app/pages/paths.ts
index eba4394d..9cf4bfb9 100644
--- a/src/app/pages/paths.ts
+++ b/src/app/pages/paths.ts
@@ -17,8 +17,6 @@ export const REGISTER_PATH = '/register/:server?/';
 export type ResetPasswordPathSearchParams = {
   email?: string;
 };
-export const SIGNED_UP_PATH = '/signed-up/';
-
 export const RESET_PASSWORD_PATH = '/reset-password/:server?/';
 
 export const _CREATE_PATH = 'create/';
@@ -76,9 +74,6 @@ export type ExploreServerPathSearchParams = {
 };
 export const EXPLORE_SERVER_PATH = `/explore/${_SERVER_PATH}`;
 
-/** One Mind's desk: its open questions, read-only until sign-in reaches chat. */
-export const DESK_PATH = '/desk/:mind/';
-
 export const CREATE_PATH = '/create';
 
 export const _NOTIFICATIONS_PATH = 'notifications/';
diff --git a/src/app/pages/signedUpRoute.test.tsx b/src/app/pages/signedUpRoute.test.tsx
deleted file mode 100644
index e1f69d31..00000000
--- a/src/app/pages/signedUpRoute.test.tsx
+++ /dev/null
@@ -1,51 +0,0 @@
-import React from 'react';
-import { beforeAll, describe, expect, it, vi } from 'vitest';
-import { renderToString } from 'react-dom/server';
-import { Route, createRoutesFromElements } from 'react-router-dom';
-import { StaticRouter, createStaticHandler } from 'react-router-dom/server';
-import { ClientConfigProvider } from '../hooks/useClientConfig';
-import type { ClientConfig } from '../hooks/useClientConfig';
-import { SIGNED_UP_PATH } from './paths';
-
-const config: ClientConfig = { registration: { enabled: true, url: 'https://accounts.example/' } };
-
-// The routes read localStorage when imported (settings atoms); the node environment has none.
-let authRoutes: typeof import('./auth/authRoutes').authRoutes;
-let SignedUp: typeof import('./auth').SignedUp;
-beforeAll(async () => {
-  vi.stubGlobal('localStorage', {
-    getItem: () => null,
-    setItem: () => undefined,
-    removeItem: () => undefined,
-  });
-  ({ authRoutes } = await import('./auth/authRoutes'));
-  ({ SignedUp } = await import('./auth'));
-}, 120_000);
-
-const matchPath = async (path: string) => {
-  const { query } = createStaticHandler(createRoutesFromElements(<Route>{authRoutes()}</Route>));
-  const context = await query(new Request(`http://localhost${path}`));
-  if (context instanceof Response) {
-    throw new Error(`redirected to ${context.headers.get('Location')}`);
-  }
-  return context.matches;
-};
-
-describe('the sign-up return page in the real route table', () => {
-  it('is its own route, outside AuthLayout (which would send it to sign in)', async () => {
-    const matches = await matchPath(SIGNED_UP_PATH);
-    // the pathless root, then the page itself: no layout route in between
-    expect(matches?.map((m) => m.route.path)).toEqual([undefined, SIGNED_UP_PATH]);
-  });
-
-  it('renders its words, not the sign-in form, when the switch is on', () => {
-    const html = renderToString(
-      <ClientConfigProvider value={config}>
-        <StaticRouter location={SIGNED_UP_PATH}>
-          <SignedUp />
-        </StaticRouter>
-      </ClientConfigProvider>
-    );
-    expect(html).toContain('Follow the steps from the sign-up page');
-  });
-});
diff --git a/src/app/phoneTapTargets.test.ts b/src/app/phoneTapTargets.test.ts
deleted file mode 100644
index 57a40bfc..00000000
--- a/src/app/phoneTapTargets.test.ts
+++ /dev/null
@@ -1,84 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import zlib from 'zlib';
-import { compile, processVanillaFile } from '@vanilla-extract/integration';
-import { MOBILE_BREAKPOINT } from './hooks/useScreenSize';
-
-// The CSS a .css.ts file emits, read back from vanilla-extract's own compile (as pages/auth/footerBand.test.ts does;
-// vanilla-extract gzips the inlined source only when it is large, so both forms are read).
-const emitted = async (file: string) => {
-  const filePath = `${process.cwd()}/src/app/${file}`;
-  const { source } = await compile({ filePath, cwd: process.cwd(), identOption: 'debug' });
-  const code = await processVanillaFile({ source, filePath, identOption: 'debug' });
-  const bytes = Buffer.from(
-    (code.match(/source=#?([A-Za-z0-9+/=]+)/) as RegExpMatchArray)[1],
-    'base64'
-  );
-  return (bytes[0] === 0x1f && bytes[1] === 0x8b ? zlib.gunzipSync(bytes) : bytes).toString();
-};
-
-type Decls = Record<string, number>;
-const parse = (body: string): Decls =>
-  Object.fromEntries(
-    body
-      .split('\n')
-      .map((l) => l.trim().replace(/;$/, ''))
-      .filter((l) => /^[a-z-]+: -?\d+px$/.test(l))
-      .map((l) => [l.split(':')[0], Number(l.split(': ')[1].replace('px', ''))])
-  );
-
-/** Pixel declarations of the rules whose selector matches, inside or outside a media query. */
-const rulesFor = (css: string, selector: RegExp, media: string | undefined): Decls[] => {
-  const scope = media
-    ? [...css.matchAll(/@media ([^{]+) \{\n([\s\S]*?\n)\}(?:\n|$)/g)]
-        .filter((m) => m[1] === media)
-        .map((m) => m[2])
-        .join('\n')
-    : css.replace(/@media [^{]+ \{\n[\s\S]*?\n\}(?:\n|$)/g, '');
-  return [...scope.matchAll(/^\s*([^{}\n]+) \{\n([^}]*)\}/gm)]
-    .filter((m) => selector.test(m[1]))
-    .map((m) => parse(m[2]));
-};
-
-const PHONE = `screen and (max-width: ${MOBILE_BREAKPOINT}px)`;
-const TAP = 44;
-
-// [target, css file, selector, measured height in CSS px on the Starfire phone run (390x844)].
-const targets: [string, string, RegExp, number][] = [
-  [
-    'sender-name button',
-    'components/message/layout/layout.css.ts',
-    /^button\.layout_Username__/,
-    23,
-  ],
-  [
-    'room-topic button',
-    'features/room/RoomViewHeader.css.ts',
-    /RoomViewHeader_HeaderTopic__\w+$/,
-    18,
-  ],
-  ['sign-in card links', 'pages/auth/styles.css.ts', /styles_AuthCard__\w+ a$/, 16],
-  ['sign-in footer links', 'pages/auth/styles.css.ts', /styles_AuthFooter__\w+ a$/, 22],
-];
-
-describe.each(targets)('phone tap target: %s', (_name, file, selector, height) => {
-  it(`grows its hit area to ${TAP} px without moving layout`, async () => {
-    const css = await emitted(file);
-    const [phone] = rulesFor(css, selector, PHONE);
-    expect(phone, 'a phone rule exists').toBeDefined();
-    const top = phone['padding-top'] ?? phone['padding-block'];
-    const bottom = phone['padding-bottom'] ?? phone['padding-block'];
-    const marginTop = phone['margin-top'] ?? phone['margin-block'];
-    const marginBottom = phone['margin-bottom'] ?? phone['margin-block'];
-    expect(height + top + bottom).toBeGreaterThanOrEqual(TAP);
-    // the margin takes back exactly what the padding added, so the target does not move or push its neighbours
-    expect(marginTop).toBe(-top);
-    expect(marginBottom).toBe(-bottom);
-  });
-
-  it('leaves every other screen as it was: no padding or margin outside the phone query', async () => {
-    const css = await emitted(file);
-    rulesFor(css, selector, undefined).forEach((decls) =>
-      expect(Object.keys(decls).filter((k) => /^(padding|margin)/.test(k))).toEqual([])
-    );
-  });
-});
diff --git a/src/app/state/sessions.ts b/src/app/state/sessions.ts
index 19f2212d..a9c34ce9 100644
--- a/src/app/state/sessions.ts
+++ b/src/app/state/sessions.ts
@@ -40,17 +40,17 @@ export function setFallbackSession(
   localStorage.setItem('cinny_user_id', userId);
   localStorage.setItem('cinny_hs_base_url', baseUrl);
 }
-export const removeFallbackSession = (storage: Storage = localStorage) => {
-  storage.removeItem('cinny_hs_base_url');
-  storage.removeItem('cinny_user_id');
-  storage.removeItem('cinny_device_id');
-  storage.removeItem('cinny_access_token');
+export const removeFallbackSession = () => {
+  localStorage.removeItem('cinny_hs_base_url');
+  localStorage.removeItem('cinny_user_id');
+  localStorage.removeItem('cinny_device_id');
+  localStorage.removeItem('cinny_access_token');
 };
-export const getFallbackSession = (storage: Storage = localStorage): Session | undefined => {
-  const baseUrl = storage.getItem('cinny_hs_base_url');
-  const userId = storage.getItem('cinny_user_id');
-  const deviceId = storage.getItem('cinny_device_id');
-  const accessToken = storage.getItem('cinny_access_token');
+export const getFallbackSession = (): Session | undefined => {
+  const baseUrl = localStorage.getItem('cinny_hs_base_url');
+  const userId = localStorage.getItem('cinny_user_id');
+  const deviceId = localStorage.getItem('cinny_device_id');
+  const accessToken = localStorage.getItem('cinny_access_token');
 
   if (baseUrl && userId && deviceId && accessToken) {
     const session: Session = {
diff --git a/src/app/utils/trainingNotice.ts b/src/app/utils/trainingNotice.ts
index 7d7f6fa1..c3d6e42a 100644
--- a/src/app/utils/trainingNotice.ts
+++ b/src/app/utils/trainingNotice.ts
@@ -28,13 +28,6 @@ export const trainingNoticeText = (previewDemo?: boolean): string =>
  * else is malformed. Absent or malformed in any way means no train line.
  */
 export const MAX_NOTICE_VERSION = 4294967295;
-
-/**
- * The version of the notice wording above. Registration shows it with the text, and a room's
- * notice event carries the same number, so one text has one version on both surfaces. Bump it
- * with the wording and nowhere else.
- */
-export const TRAINING_NOTICE_VERSION = 1;
 export const ROOM_NOTICE_EVENT_TYPE = StateEvent.GameCultNotice;
 
 export type RoomNotice = { version: number; scope: 'show' | 'study' | 'train' };
diff --git a/src/index.tsx b/src/index.tsx
index 51e9760f..6c7a3bc2 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -30,32 +30,29 @@ import { getFallbackSession } from './app/state/sessions';
 
 document.body.classList.add(configClass, varsClass);
 
-// Register Service Worker. After the preview demo has settled the stored session: the worker is
-// handed that session, and the demo may drop one it cannot serve.
-const registerServiceWorker = () => {
-  if ('serviceWorker' in navigator) {
-    const swUrl =
-      import.meta.env.MODE === 'production'
-        ? `${trimTrailingSlash(import.meta.env.BASE_URL)}/sw.js`
-        : `/dev-sw.js?dev-sw`;
+// Register Service Worker
+if ('serviceWorker' in navigator) {
+  const swUrl =
+    import.meta.env.MODE === 'production'
+      ? `${trimTrailingSlash(import.meta.env.BASE_URL)}/sw.js`
+      : `/dev-sw.js?dev-sw`;
 
-    const sendSessionToSW = () => {
-      const session = getFallbackSession();
-      pushSessionToSW(session?.baseUrl, session?.accessToken);
-    };
+  const sendSessionToSW = () => {
+    const session = getFallbackSession();
+    pushSessionToSW(session?.baseUrl, session?.accessToken);
+  };
 
-    navigator.serviceWorker.register(swUrl).then(sendSessionToSW);
-    navigator.serviceWorker.ready.then(sendSessionToSW);
+  navigator.serviceWorker.register(swUrl).then(sendSessionToSW);
+  navigator.serviceWorker.ready.then(sendSessionToSW);
 
-    navigator.serviceWorker.addEventListener('message', (ev) => {
-      const { type } = ev.data ?? {};
+  navigator.serviceWorker.addEventListener('message', (ev) => {
+    const { type } = ev.data ?? {};
 
-      if (type === 'requestSession') {
-        sendSessionToSW();
-      }
-    });
-  }
-};
+    if (type === 'requestSession') {
+      sendSessionToSW();
+    }
+  });
+}
 
 // The pretend homeserver of the dev preview: built in only with VITE_PREVIEW_DEMO=1 (the dev
 // workflow) and switched on by `previewDemo: true` in config.json. Any other build drops it.
@@ -79,7 +76,4 @@ const mountApp = () => {
   root.render(<App />);
 };
 
-installPreviewDemo().finally(() => {
-  registerServiceWorker();
-  mountApp();
-});
+installPreviewDemo().finally(mountApp);
diff --git a/src/preview-demo/deskForks.test.ts b/src/preview-demo/deskForks.test.ts
deleted file mode 100644
index 035dd2d8..00000000
--- a/src/preview-demo/deskForks.test.ts
+++ /dev/null
@@ -1,97 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { buildDesk } from '../app/features/desk/buildDesk';
-import { ForkList } from '../app/features/desk/forkContract';
-import { deskFor, setDeskSource } from '../app/features/desk/source';
-import { unverifiedForks } from '../app/features/desk/optionsHash';
-import { demoDesk } from './deskForks';
-
-const KEYS = {
-  list: ['schemaVersion', 'mind', 'stamp', 'open_count', 'recorded_count', 'forks', 'next_cursor'],
-  card: [
-    'schemaVersion',
-    'fork_id',
-    'title',
-    'context',
-    'options',
-    'recommendation',
-    'depends',
-    'leans',
-    'flag',
-    'raised_in',
-    'deciders',
-    'status',
-    'ruling',
-    'ruled_from',
-    'order',
-    'options_hash',
-  ],
-  record: ['schemaVersion', 'fork_id', 'options_hash', 'counted_answer_id', 'answers'],
-  answer: [
-    'schemaVersion',
-    'answer_id',
-    'fork_id',
-    'outcome',
-    'of',
-    'retracts',
-    'code',
-    'options_hash',
-    'choice',
-    'note',
-    'answered_at',
-    'received_at',
-    'claim_in_future',
-    'answerer',
-    'authority',
-    'request_id',
-  ],
-};
-const sorted = (o: object) => Object.keys(o).sort();
-
-describe('the demo desks', () => {
-  const nibu = demoDesk('nibu') as ForkList;
-  it('are contract-shaped: every key written, no others, counts matching the forks', () => {
-    ['nibu', 'eureka'].forEach((m) => {
-      const l = demoDesk(m) as ForkList;
-      expect(sorted(l)).toEqual([...KEYS.list].sort());
-      expect(l.open_count).toBe(l.forks.filter((f) => f.card.status === 'open').length);
-      expect(l.recorded_count).toBe(l.forks.filter((f) => f.card.status === 'closed').length);
-      l.forks.forEach(({ card, record }) => {
-        expect(sorted(card)).toEqual([...KEYS.card].sort());
-        expect(sorted(record)).toEqual([...KEYS.record].sort());
-        expect(record.fork_id).toBe(card.fork_id);
-        expect(record.options_hash).toBe(card.options_hash);
-        record.answers.forEach((a) => expect(sorted(a)).toEqual([...KEYS.answer].sort()));
-        const ids = record.answers.map((a) => a.answer_id);
-        if (record.counted_answer_id !== null) expect(ids).toContain(record.counted_answer_id);
-        expect(card.options.map((o) => o.id)).toContain(card.recommendation);
-        if (card.status === 'closed') expect(card.ruling).not.toBeNull();
-      });
-    });
-  });
-  it('seed open forks, a counted answer with a note and one without, a revision, and a ruling', () => {
-    const answers = nibu.forks.flatMap((f) => f.record.answers);
-    const counted = nibu.forks.flatMap((f) =>
-      f.record.answers.filter((a) => a.answer_id === f.record.counted_answer_id)
-    );
-    expect(nibu.open_count).toBe(3);
-    expect(counted.some((a) => a.note !== null)).toBe(true);
-    expect(counted.some((a) => a.note === null)).toBe(true);
-    expect(answers.some((a) => a.outcome === 'Revision')).toBe(true);
-    expect(buildDesk(nibu).recorded).toEqual([
-      expect.objectContaining({ rulingId: 'demo:ruling:ridge-low-tier' }),
-    ]);
-    expect(nibu.forks.some((f) => f.card.leans !== null && f.card.flag !== null)).toBe(true);
-  });
-  it('leave other Minds unpublished, so their group shows no desk entry', () => {
-    expect(demoDesk('kiko')).toBeUndefined();
-  });
-  it('are what the page reads once installed as the source', () => {
-    setDeskSource(demoDesk);
-    expect(deskFor('nibu')?.mind).toBe('nibu');
-    setDeskSource(() => undefined);
-  });
-  it('carry the hash of what they show, so the desk shows every seeded card', async () => {
-    expect(await unverifiedForks(nibu.forks)).toEqual(new Set());
-    expect(await unverifiedForks((demoDesk('eureka') as ForkList).forks)).toEqual(new Set());
-  });
-});
diff --git a/src/preview-demo/deskForks.ts b/src/preview-demo/deskForks.ts
deleted file mode 100644
index a0ca67bf..00000000
--- a/src/preview-demo/deskForks.ts
+++ /dev/null
@@ -1,187 +0,0 @@
-// Seeded forks for the preview's Mind desks, shaped as Bifrost serves them (gamecult.fork.list.v0, CultLib
-// fork-card.md). Invented here, public-safe, demo-only: no real question, person or decision. Answer times are
-// written against the clock at the time of the call so they stay plausible.
-import { DeskAnswer, ForkCard, ForkEntry, ForkList } from '../app/features/desk/forkContract';
-
-const DAY = 24 * 60 * 60 * 1000;
-
-// Each card's options_hash over what it shows (optionsHash.ts); deskForks.test.ts fails if a seed is edited without it.
-const HASHES: Record<string, string> = {
-  'sky-label': '727c7944919baf8953a0473bcbb38837c2e83c87d97a31a09ed6506a0e3b4028',
-  'dusk-ink': 'e15b64509db522af68ad8904767edf0903a701809e50f1074c1c8b4b3660acae',
-  'phone-gutter': '893d90ae7bc8e3204afb62501af76375e98597ec565856622401583d6db33324',
-  'ridge-low-tier': '6edd4a08b6c86703d91b3f48bd697aca16450111573a8e391e3dfe3adc6cbf5f',
-  'settled-window': 'b0dd0db3a37a256618d447ff8fb4067892b4f1f82d05a1e5bebf5563c447731c',
-};
-
-const card = (label: string, order: number, over: Partial<ForkCard>): ForkCard => ({
-  schemaVersion: 'gamecult.fork.card.v0',
-  fork_id: `demo:question:${label}`,
-  title: label,
-  context: '',
-  options: [],
-  recommendation: '',
-  depends: [],
-  leans: null,
-  flag: null,
-  raised_in: null,
-  deciders: ['demo-decider'],
-  status: 'open',
-  ruling: null,
-  ruled_from: [],
-  order,
-  options_hash: HASHES[label],
-  ...over,
-});
-
-const answer = (
-  c: ForkCard,
-  n: number,
-  daysAgo: number,
-  over: Partial<DeskAnswer> = {}
-): DeskAnswer => {
-  const at = new Date(Date.now() - daysAgo * DAY).toISOString().replace(/\.\d+Z$/, 'Z');
-  return {
-    schemaVersion: 'gamecult.desk_answer.v0',
-    answer_id: `n${n}`,
-    fork_id: c.fork_id,
-    outcome: 'Counted',
-    of: null,
-    retracts: null,
-    code: null,
-    options_hash: c.options_hash,
-    choice: null,
-    note: null,
-    answered_at: at,
-    received_at: at,
-    claim_in_future: false,
-    answerer: `demo-account-${n}`,
-    authority: 'Member',
-    request_id: `demo-request-${n}`,
-    ...over,
-  };
-};
-
-const entry = (
-  c: ForkCard,
-  answers: DeskAnswer[] = [],
-  counted: string | null = null
-): ForkEntry => ({
-  schemaVersion: 'gamecult.fork.entry.v0',
-  card: c,
-  record: {
-    schemaVersion: 'gamecult.fork.record.v0',
-    fork_id: c.fork_id,
-    options_hash: c.options_hash,
-    counted_answer_id: counted,
-    answers,
-  },
-});
-
-const list = (mind: string, forks: ForkEntry[], stamp: string): ForkList => ({
-  schemaVersion: 'gamecult.fork.list.v0',
-  mind,
-  stamp,
-  open_count: forks.filter((f) => f.card.status === 'open').length,
-  recorded_count: forks.filter((f) => f.card.status === 'closed').length,
-  forks: [...forks].sort((a, b) => b.card.order - a.card.order),
-  next_cursor: null,
-});
-
-const nibu = (): ForkList => {
-  const sky = card('sky-label', 4, {
-    title: 'Where should the sky label sit on a phone?',
-    context:
-      'The label can ride the horizon or sit in the header. The horizon is prettier; the header never moves.',
-    options: [
-      { id: 'horizon', text: 'On the horizon, over the ridge' },
-      { id: 'header', text: 'In the header, fixed' },
-    ],
-    recommendation: 'header',
-    leans: 'header',
-    flag: 'Blocks the dusk ink question',
-  });
-  const dusk = card('dusk-ink', 3, {
-    title: 'Should the dusk ink follow the sky or the theme?',
-    context:
-      'Names in dusk are readable either way; following the sky is livelier, following the theme is steadier.',
-    options: [
-      { id: 'sky', text: 'Follow the sky' },
-      { id: 'theme', text: 'Follow the theme' },
-      { id: 'both', text: 'Sky by day, theme by night' },
-    ],
-    recommendation: 'sky',
-    depends: ['Where the sky label sits'],
-  });
-  const gutter = card('phone-gutter', 2, {
-    title: 'How wide is the phone gutter?',
-    context: 'A narrow gutter fits more on screen; a wide one is easier to thumb past.',
-    options: [
-      { id: 'narrow', text: 'Narrow' },
-      { id: 'wide', text: 'Wide' },
-    ],
-    recommendation: 'narrow',
-  });
-  const ridge = card('ridge-low-tier', 1, {
-    title: 'Keep the ridge scene at the low tier?',
-    context: 'The ridge costs a little on older phones.',
-    options: [
-      { id: 'keep', text: 'Keep it' },
-      { id: 'drop', text: 'Drop it' },
-    ],
-    recommendation: 'keep',
-    status: 'closed',
-    ruling: 'demo:ruling:ridge-low-tier',
-    ruled_from: ['n1'],
-  });
-  return list(
-    'nibu',
-    [
-      entry(sky),
-      entry(
-        dusk,
-        [
-          answer(dusk, 2, 2, { choice: 'sky' }),
-          answer(dusk, 3, 1, {
-            outcome: 'Revision',
-            of: 'n2',
-            choice: 'both',
-            answerer: 'demo-account-3',
-          }),
-        ],
-        'n2'
-      ),
-      entry(
-        gutter,
-        [answer(gutter, 4, 1, { choice: 'narrow', note: 'Thumbs are smaller than we fear.' })],
-        'n4'
-      ),
-      entry(
-        ridge,
-        [answer(ridge, 1, 12, { choice: 'keep', note: 'It is the best part of the page.' })],
-        'n1'
-      ),
-    ],
-    's41'
-  );
-};
-
-const eureka = (): ForkList => {
-  const window = card('settled-window', 1, {
-    title: 'How long should a Mind keep a settled question on its desk?',
-    context:
-      'Settled questions are listed as rulings. A shorter window keeps the desk light; a longer one keeps context near.',
-    options: [
-      { id: '30d', text: 'Thirty days' },
-      { id: '90d', text: 'Ninety days' },
-      { id: 'always', text: 'Keep them all' },
-    ],
-    recommendation: '30d',
-  });
-  return list('eureka', [entry(window)], 's7');
-};
-
-const SEEDS: Record<string, () => ForkList> = { nibu, eureka };
-
-/** The demo's desk for a Mind, or nothing: a Mind without seeds has not published yet. */
-export const demoDesk = (mind: string): ForkList | undefined => SEEDS[mind]?.();
diff --git a/src/preview-demo/fixtures.ts b/src/preview-demo/fixtures.ts
index 18b2fac1..c96a4ccf 100644
--- a/src/preview-demo/fixtures.ts
+++ b/src/preview-demo/fixtures.ts
@@ -44,8 +44,6 @@ export type DemoRoom = {
   topic?: string;
   members: string[];
   notice?: 'show' | 'study' | 'train';
-  /** The m.room.create `type`. */
-  type?: string;
   parent?: string;
   steward?: { mind: string; repo: string };
   joined: boolean;
@@ -56,7 +54,6 @@ export const ROOT = `!root:${DEMO_SERVER}`;
 export const PROJECTS = `!projects:${DEMO_SERVER}`;
 export const GENERAL = `!general:${DEMO_SERVER}`;
 export const COMMONS = `!commons:${DEMO_SERVER}`;
-export const FILES = `!files:${DEMO_SERVER}`;
 
 const everyone = USERS.map((u) => u.id);
 export const MIND_IDS = [user('eureka'), user('void'), user('nibu')];
@@ -118,17 +115,6 @@ export const ROOMS: DemoRoom[] = [
       { from: user('heimdall'), body: 'Ok.', pose: 'thinking', minutesAgo: 20 },
     ],
   },
-  {
-    id: FILES,
-    alias: `#files:${DEMO_SERVER}`,
-    name: 'Files',
-    topic: 'The file zone: one thread per Mind, shown as albums.',
-    type: 'org.gamecult.file_zone',
-    members: [ME, ...minds],
-    parent: ROOT,
-    joined: true,
-    lines: [],
-  },
   {
     id: PROJECTS,
     alias: `#projects:${DEMO_SERVER}`,
@@ -316,36 +302,6 @@ export const ROOMS: DemoRoom[] = [
   },
 ];
 
-// The file zone's albums: a thread root per album, one thread reply per file. Media is generated
-// in media.ts: audio by tone frequency, images by gradient color.
-export type DemoAlbum = {
-  mind: string;
-  title: string;
-  minutesAgo: number;
-  files: { kind: 'audio' | 'image'; name: string; seed: number | [number, number, number] }[];
-};
-export const ALBUMS: DemoAlbum[] = [
-  {
-    mind: user('void'),
-    title: 'void',
-    minutesAgo: 90,
-    files: [
-      { kind: 'audio', name: 'low-tone.wav', seed: 220 },
-      { kind: 'audio', name: 'mid-tone.wav', seed: 330 },
-      { kind: 'audio', name: 'high-tone.wav', seed: 440 },
-    ],
-  },
-  {
-    mind: user('nibu'),
-    title: 'nibu',
-    minutesAgo: 30,
-    files: [
-      { kind: 'image', name: 'dusk.png', seed: [200, 90, 60] },
-      { kind: 'image', name: 'lagoon.png', seed: [40, 150, 190] },
-    ],
-  },
-];
-
 // A Mind's canned answer to whatever the visitor types: label and line.
 export const REPLIES: { pose: string; body: string }[] = [
   { pose: 'thinking', body: 'Hm. Let me think about that.' },
diff --git a/src/preview-demo/install.ts b/src/preview-demo/install.ts
index 54bddd71..a7b66de9 100644
--- a/src/preview-demo/install.ts
+++ b/src/preview-demo/install.ts
@@ -4,11 +4,8 @@
 // only by a build with VITE_PREVIEW_DEMO=1 whose config.json says previewDemo: true (src/index.tsx).
 // Own-origin requests (the app's static files) pass; the demo origin is answered in-page; any
 // other origin is refused, so no real homeserver can be contacted while this is on.
-import { removeFallbackSession } from '../app/state/sessions';
 import { DEMO_ORIGIN } from './fixtures';
 import { createDemoServer, DemoServer } from './server';
-import { demoDesk } from './deskForks';
-import { setDeskSource } from '../app/features/desk/source';
 
 export type Route = 'own' | 'demo' | 'refuse';
 
@@ -30,6 +27,8 @@ const refusal = (what: string, url: string) =>
   new Error(`preview: pretend server only; ${what} to ${url} refused`);
 
 const BANNER_TEXT = 'preview: pretend server. Any password works.';
+const FOREIGN_SESSION_TEXT =
+  'preview: pretend server. A login for another server is stored here and cannot be used.';
 
 // In flow, above the app: body becomes a column and the app root takes the rest, so the banner
 // never covers the room header or the connection strip.
@@ -73,30 +72,14 @@ export const guardedFetch =
       body: parseBody(raw),
       signal: init?.signal ?? req?.signal ?? undefined,
     });
-    if (out.raw) {
-      return new Response(out.raw.data, {
-        status: out.status,
-        headers: { 'Content-Type': out.raw.type },
-      });
-    }
     return new Response(JSON.stringify(out.body), {
       status: out.status,
       headers: { 'Content-Type': 'application/json' },
     });
   };
 
-// Every preview of this site shares one origin, so one localStorage: a login another preview left
-// (a real homeserver) would make the app connect to that server, which the guard refuses. The
-// demo has one server, so a stored login for any other is dropped before the app reads it.
-export const dropForeignSession = (storage: Storage) => {
-  const base = storage.getItem('cinny_hs_base_url');
-  if (base !== null && base !== DEMO_ORIGIN) removeFallbackSession(storage);
-};
-
 export const installDemo = (win: Window & typeof globalThis = window) => {
-  dropForeignSession(win.localStorage);
   const server = createDemoServer();
-  setDeskSource(demoDesk);
   const { origin } = win.location;
   const realFetch = win.fetch.bind(win);
 
@@ -128,6 +111,7 @@ export const installDemo = (win: Window & typeof globalThis = window) => {
       routeOf(String(url), origin) === 'own' ? realBeacon(url, data) : false;
   }
 
-  showBanner(BANNER_TEXT);
+  const stored = win.localStorage.getItem('cinny_hs_base_url');
+  showBanner(stored !== null && stored !== DEMO_ORIGIN ? FOREIGN_SESSION_TEXT : BANNER_TEXT);
   return server;
 };
diff --git a/src/preview-demo/media.ts b/src/preview-demo/media.ts
deleted file mode 100644
index cfde5669..00000000
--- a/src/preview-demo/media.ts
+++ /dev/null
@@ -1,95 +0,0 @@
-/* eslint-disable no-bitwise */
-// Tiny media for the pretend server's file zone, generated here so the repo holds no binaries.
-export type DemoMedia = { type: string; data: Uint8Array };
-
-const u32 = (n: number): number[] => [(n >>> 24) & 255, (n >>> 16) & 255, (n >>> 8) & 255, n & 255];
-const le = (n: number, bytes: number): number[] =>
-  Array.from({ length: bytes }, (_, i) => (n >>> (8 * i)) & 255);
-
-/** A 0.6 s mono 8 kHz 8-bit WAV: a sine at `hz` with a soft fade. */
-export const wavTone = (hz: number): DemoMedia => {
-  const rate = 8000;
-  const n = Math.round(rate * 0.6);
-  const pcm = Array.from({ length: n }, (_, i) => {
-    const fade = Math.min(1, i / 400, (n - i) / 400);
-    return Math.round(128 + 90 * fade * Math.sin((2 * Math.PI * hz * i) / rate));
-  });
-  const tag = (s: string) => Array.from(s, (c) => c.charCodeAt(0));
-  return {
-    type: 'audio/wav',
-    data: Uint8Array.from([
-      ...tag('RIFF'),
-      ...le(36 + n, 4),
-      ...tag('WAVEfmt '),
-      ...le(16, 4),
-      ...le(1, 2),
-      ...le(1, 2),
-      ...le(rate, 4),
-      ...le(rate, 4),
-      ...le(1, 2),
-      ...le(8, 2),
-      ...tag('data'),
-      ...le(n, 4),
-      ...pcm,
-    ]),
-  };
-};
-
-const crc32 = (bytes: number[]): number => {
-  let c = ~0;
-  bytes.forEach((b) => {
-    c ^= b;
-    for (let k = 0; k < 8; k += 1) c = (c >>> 1) ^ (0xedb88320 & -(c & 1));
-  });
-  return ~c >>> 0;
-};
-
-const chunk = (name: string, data: number[]): number[] => {
-  const body = [...Array.from(name, (c) => c.charCodeAt(0)), ...data];
-  return [...u32(data.length), ...body, ...u32(crc32(body))];
-};
-
-/** A 32 x 32 RGB PNG: a diagonal gradient in `rgb`, zlib "stored" blocks, no compression. */
-export const pngGradient = (rgb: [number, number, number]): DemoMedia => {
-  const size = 32;
-  const raw: number[] = [];
-  for (let y = 0; y < size; y += 1) {
-    raw.push(0);
-    for (let x = 0; x < size; x += 1) {
-      const f = 0.35 + (0.65 * (x + y)) / (2 * size);
-      raw.push(...rgb.map((v) => Math.round(v * f)));
-    }
-  }
-  let a = 1;
-  let b = 0;
-  raw.forEach((v) => {
-    a = (a + v) % 65521;
-    b = (b + a) % 65521;
-  });
-  // One stored block holds up to 65535 bytes; 32 * 97 = 3104 fits.
-  const zlib = [
-    0x78,
-    0x01,
-    1,
-    ...le(raw.length, 2),
-    ...le(~raw.length & 0xffff, 2),
-    ...raw,
-    ...u32(((b << 16) | a) >>> 0),
-  ];
-  return {
-    type: 'image/png',
-    data: Uint8Array.from([
-      137,
-      80,
-      78,
-      71,
-      13,
-      10,
-      26,
-      10,
-      ...chunk('IHDR', [...u32(size), ...u32(size), 8, 2, 0, 0, 0]),
-      ...chunk('IDAT', zlib),
-      ...chunk('IEND', []),
-    ]),
-  };
-};
diff --git a/src/preview-demo/server.test.ts b/src/preview-demo/server.test.ts
index 0b98e90d..d277b97b 100644
--- a/src/preview-demo/server.test.ts
+++ b/src/preview-demo/server.test.ts
@@ -1,18 +1,10 @@
 /* eslint-disable max-classes-per-file, no-promise-executor-return, no-useless-constructor, no-empty-function, no-void, @typescript-eslint/no-non-null-assertion */
 import { afterEach, describe, expect, it, vi } from 'vitest';
-import {
-  ClientEvent,
-  ClientPrefix,
-  MatrixClient,
-  Method,
-  SyncState,
-  createClient,
-} from 'matrix-js-sdk';
-import { ALBUMS, DEMO_ORIGIN, ME, ROOMS, GENERAL, COMMONS, FILES } from './fixtures';
-import { dropForeignSession, guardedFetch, installDemo, routeOf } from './install';
+import { ClientEvent, MatrixClient, SyncState, createClient } from 'matrix-js-sdk';
+import { DEMO_ORIGIN, ME, ROOMS, GENERAL, COMMONS } from './fixtures';
+import { guardedFetch, installDemo, routeOf } from './install';
 import { createDemoServer, DemoServer } from './server';
 import { seedDemoSettings } from './seed';
-import { getFallbackSession } from '../app/state/sessions';
 import { mindOfSender, POSE_KEY, resolvePose } from '../app/components/message/pose/poses';
 import { parseRoomNotice, roomTrainingLine } from '../app/utils/trainingNotice';
 
@@ -37,9 +29,6 @@ const waitFor = <T>(read: () => T | undefined, ms = 5000): Promise<T> =>
     tick();
   });
 
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-type Ev = { event_id: string; content: Record<string, any> };
-
 const live: { server: DemoServer; mx: MatrixClient }[] = [];
 afterEach(() => {
   live.splice(0).forEach(({ server, mx }) => {
@@ -126,12 +115,7 @@ describe('the pretend homeserver through matrix-js-sdk', () => {
       const ev = mx.getRoom(r.id)!.currentState.getStateEvents('org.gamecult.notice', '');
       return [r.name, roomTrainingLine(parseRoomNotice(ev?.getContent())) !== undefined];
     });
-    expect(Object.fromEntries(lines)).toEqual({
-      General: true,
-      Files: false,
-      Ratatoskr: false,
-      Huginn: false,
-    });
+    expect(Object.fromEntries(lines)).toEqual({ General: true, Ratatoskr: false, Huginn: false });
   });
 
   it('sends a message, echoes it once with its transaction id, and a Mind answers with a pose', async () => {
@@ -187,56 +171,6 @@ describe('the pretend homeserver through matrix-js-sdk', () => {
     expect(stewards.filter(Boolean).length).toBe(2);
   });
 
-  it('syncs the file zone as a joined room whose create type marks it', async () => {
-    const { mx } = await syncedClient();
-    const create = mx.getRoom(FILES)!.currentState.getStateEvents('m.room.create', '')!;
-    expect(create.getContent().type).toBe('org.gamecult.file_zone');
-    expect(
-      mx.getRoom(GENERAL)!.currentState.getStateEvents('m.room.create', '')!.getContent().type
-    ).toBeUndefined();
-  });
-
-  it('serves the zone albums through the thread endpoints and their media as bytes', async () => {
-    const { mx } = await syncedClient();
-    const get = (path: string, params?: Record<string, string>) =>
-      mx.http.authedRequest<{ chunk: Ev[] }>(Method.Get, path, params, undefined, {
-        prefix: ClientPrefix.V1,
-      });
-    const roots = (await get(`/rooms/${encodeURIComponent(FILES)}/threads`)).chunk;
-    expect(roots.map((r) => r.content.body).sort()).toEqual(ALBUMS.map((a) => a.title).sort());
-    const counts: Record<string, string[]> = {};
-    await Promise.all(
-      roots.map(async (root: Ev) => {
-        const rel = `/rooms/${encodeURIComponent(FILES)}/relations/${encodeURIComponent(
-          root.event_id
-        )}/m.thread`;
-        const oldest = (await get(rel, { dir: 'f' })).chunk;
-        const newest = (await get(rel)).chunk;
-        expect(newest.map((e: Ev) => e.event_id)).toEqual(
-          oldest.map((e: Ev) => e.event_id).reverse()
-        );
-        counts[root.content.body] = oldest.map((e: Ev) => e.content.msgtype);
-        expect(oldest.every((e: Ev) => e.content['m.relates_to'].event_id === root.event_id)).toBe(
-          true
-        );
-      })
-    );
-    expect(counts).toEqual({
-      void: ['m.audio', 'm.audio', 'm.audio'],
-      nibu: ['m.image', 'm.image'],
-    });
-    const f = guardedFetch(createDemoServer(), PAGE, never as never);
-    const wav = await f(`${DEMO_ORIGIN}/_matrix/client/v1/media/download/demo.invalid/album0file0`);
-    expect(wav.headers.get('content-type')).toBe('audio/wav');
-    expect(new TextDecoder().decode((await wav.arrayBuffer()).slice(0, 4))).toBe('RIFF');
-    const png = await f(`${DEMO_ORIGIN}/_matrix/media/v3/download/demo.invalid/album1file1`);
-    expect(png.headers.get('content-type')).toBe('image/png');
-    expect((await png.arrayBuffer()).byteLength).toBeGreaterThan(100);
-    expect(
-      (await f(`${DEMO_ORIGIN}/_matrix/client/v1/media/download/demo.invalid/nope`)).status
-    ).toBe(404);
-  });
-
   it('answers a long poll with nothing new after its timeout', async () => {
     const server = createDemoServer();
     live.push({ server, mx: clientFor(server) });
@@ -299,7 +233,6 @@ describe('the guard', () => {
       localStorage: {
         getItem: (k: string) => store.get(k) ?? null,
         setItem: (k: string, v: string) => void store.set(k, v),
-        removeItem: (k: string) => void store.delete(k),
       },
     } as unknown as Window & typeof globalThis;
     vi.stubGlobal('document', {
@@ -321,59 +254,6 @@ describe('the guard', () => {
     vi.unstubAllGlobals();
   });
 
-  it('drops a stored login for a real homeserver before the app reads it, keeps the demo one', () => {
-    const SESSION = {
-      cinny_access_token: 'tok',
-      cinny_device_id: 'DEV',
-      cinny_user_id: '@a:b',
-      cinny_hs_base_url: 'https://chat.gamecult.org',
-    };
-    const store = new Map<string, string>(Object.entries({ ...SESSION, settings: '{}' }));
-    const storage = {
-      getItem: (k: string) => store.get(k) ?? null,
-      setItem: (k: string, v: string) => void store.set(k, v),
-      removeItem: (k: string) => void store.delete(k),
-    } as Storage;
-    dropForeignSession(storage);
-    expect(getFallbackSession(storage)).toBeUndefined();
-    expect([...store.keys()]).toEqual(['settings']);
-
-    Object.entries({ ...SESSION, cinny_hs_base_url: DEMO_ORIGIN }).forEach(([k, v]) =>
-      store.set(k, v)
-    );
-    dropForeignSession(storage);
-    expect(getFallbackSession(storage)?.baseUrl).toBe(DEMO_ORIGIN);
-  });
-
-  it('installDemo clears a foreign login so the app starts at the login screen', () => {
-    const store = new Map<string, string>([
-      ['cinny_hs_base_url', 'https://chat.gamecult.org'],
-      ['cinny_access_token', 'tok'],
-      ['cinny_device_id', 'DEV'],
-      ['cinny_user_id', '@a:b'],
-    ]);
-    const win = {
-      location: { origin: PAGE },
-      fetch: never,
-      WebSocket: class {},
-      XMLHttpRequest: { prototype: { open: vi.fn() } },
-      navigator: {},
-      localStorage: {
-        getItem: (k: string) => store.get(k) ?? null,
-        removeItem: (k: string) => void store.delete(k),
-      },
-    } as unknown as Window & typeof globalThis;
-    vi.stubGlobal('document', {
-      createElement: () => ({ style: {}, setAttribute: vi.fn() }),
-      getElementById: () => null,
-      body: { style: {}, insertBefore: vi.fn() },
-    });
-    const server = installDemo(win);
-    live.push({ server, mx: clientFor(server) });
-    expect(store.size).toBe(0);
-    vi.unstubAllGlobals();
-  });
-
   it('seeds pose portraits on for a first visit and keeps what a visitor already chose', () => {
     const fresh = new Map<string, string>();
     seedDemoSettings({
diff --git a/src/preview-demo/server.ts b/src/preview-demo/server.ts
index ed8cbf46..33a51b16 100644
--- a/src/preview-demo/server.ts
+++ b/src/preview-demo/server.ts
@@ -3,7 +3,6 @@
 // send messages and get a Mind's canned answer. It touches no network and no storage; the
 // fetch guard that routes requests here lives in install.ts.
 import {
-  ALBUMS,
   COMMONS,
   DEMO_DEVICE,
   DEMO_ORIGIN,
@@ -11,17 +10,14 @@ import {
   DEMO_TOKEN,
   DemoEvent,
   DemoRoom,
-  FILES,
   ME,
   MIND_IDS,
   REPLIES,
   ROOMS,
   USERS,
 } from './fixtures';
-import { DemoMedia, pngGradient, wavTone } from './media';
 
-/** `raw` answers a media download with bytes instead of JSON. */
-export type DemoResponse = { status: number; body: unknown; raw?: DemoMedia };
+export type DemoResponse = { status: number; body: unknown };
 export type DemoRequest = { method: string; url: string; body?: unknown; signal?: AbortSignal };
 
 const POSE_KEY = 'org.gamecult.pose';
@@ -83,12 +79,7 @@ export const createDemoServer = (now: () => number = Date.now): DemoServer => {
       mk(
         'm.room.create',
         creator,
-        {
-          room_version: '10',
-          ...((room.space ? 'm.space' : room.type)
-            ? { type: room.space ? 'm.space' : room.type }
-            : {}),
-        },
+        room.space ? { type: 'm.space', room_version: '10' } : { room_version: '10' },
         t0,
         ''
       ),
@@ -168,45 +159,6 @@ export const createDemoServer = (now: () => number = Date.now): DemoServer => {
     [`@eureka:${DEMO_SERVER}`]: ROOMS.filter((r) => r.direct).map((r) => r.id),
   });
 
-  // The file zone's albums live outside the sync timeline: thread roots per room, replies per
-  // root, media by mxc id. The thread endpoints and media downloads answer from these.
-  const threadRoots = new Map<string, DemoEvent[]>();
-  const threadReplies = new Map<string, DemoEvent[]>();
-  const media = new Map<string, DemoMedia>();
-  ALBUMS.forEach((album, a) => {
-    const t0 = now() - album.minutesAgo * 60 * 1000;
-    const root = mk('m.room.message', album.mind, { msgtype: 'm.text', body: album.title }, t0);
-    threadRoots.set(FILES, [...(threadRoots.get(FILES) ?? []), root]);
-    threadReplies.set(
-      root.event_id,
-      album.files.map((f, i) => {
-        const id = `album${a}file${i}`;
-        const m =
-          f.kind === 'audio'
-            ? wavTone(f.seed as number)
-            : pngGradient(f.seed as [number, number, number]);
-        media.set(id, m);
-        return mk(
-          'm.room.message',
-          album.mind,
-          {
-            msgtype: f.kind === 'audio' ? 'm.audio' : 'm.image',
-            body: f.name,
-            url: `mxc://${DEMO_SERVER}/${id}`,
-            info: { mimetype: m.type, size: m.data.length },
-            'm.relates_to': {
-              rel_type: 'm.thread',
-              event_id: root.event_id,
-              is_falling_back: true,
-              'm.in_reply_to': { event_id: root.event_id },
-            },
-          },
-          t0 + (i + 1) * 60 * 1000
-        );
-      })
-    );
-  });
-
   const notify = () => {
     waiters.forEach((w) => w());
     waiters.clear();
@@ -338,11 +290,6 @@ export const createDemoServer = (now: () => number = Date.now): DemoServer => {
     if (p === '/.well-known/matrix/client')
       return ok({ 'm.homeserver': { base_url: DEMO_ORIGIN } });
     if (!p.startsWith('/_matrix/')) return err(404, 'M_NOT_FOUND', 'Not found');
-    g = p.match(/^\/_matrix\/(?:client\/v1\/media|media\/v3)\/download\/[^/]+\/([^/]+)$/);
-    if (g) {
-      const found = media.get(g[1]);
-      return found ? { status: 200, body: null, raw: found } : err(404, 'M_NOT_FOUND', 'No media');
-    }
     const c = p.replace(/^\/_matrix\/client\/(v\d+|r0|unstable)/, '');
     if (p.endsWith('/versions'))
       return ok({ versions: ['v1.1', 'v1.5', 'v1.11'], unstable_features: {} });
@@ -447,13 +394,6 @@ export const createDemoServer = (now: () => number = Date.now): DemoServer => {
     if (g) {
       return ok({ chunk: (stateOf.get(g[1]) ?? []).filter((e) => e.type === 'm.room.member') });
     }
-    g = c.match(/^\/rooms\/([^/]+)\/threads$/);
-    if (g) return ok({ chunk: [...(threadRoots.get(g[1]) ?? [])].reverse() });
-    g = c.match(/^\/rooms\/([^/]+)\/relations\/([^/]+)\/m\.thread$/);
-    if (g) {
-      const oldestFirst = [...(threadReplies.get(g[2]) ?? [])];
-      return ok({ chunk: u.searchParams.get('dir') === 'f' ? oldestFirst : oldestFirst.reverse() });
-    }
     g = c.match(/^\/rooms\/([^/]+)\/messages$/);
     if (g) return ok({ chunk: [], start: 'p0', end: 'p0' });
     g = c.match(/^\/rooms\/([^/]+)\/(?:summary|context\/.+)$/);