feat(crypto): QR-code device verification (alongside emoji SAS)

B2 of the Matrix protocol-gaps roadmap, gate-green (688 tests):
- Enable QR verification methods (show/scan/reciprocate) in initMatrix.
- Extend DeviceVerification: the Ready step offers your own QR (byte-mode encode
  via qrcode), a camera 'Scan their QR code' flow, and an emoji fallback; the
  Started step routes reciprocate → a confirm step (useVerifierShowReciprocateQr)
  or SAS as before.
- New QrScanner component: getUserMedia + jsQR, handing the raw binaryData bytes
  to request.scanQRCode (BarcodeDetector is string-only, so can't be used).
- Adds qrcode + jsqr (small, pure-JS, client-only); build-verified under rolldown.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

LOTUS_TESTING.md

@@ -675,6 +675,24 @@ Run the axe DevTools extension (or Lighthouse → Accessibility) on a room view,
 
 ## Outstanding verification backlog
 
+**QR Device Verification (2026-07):** With two logged-in Lotus sessions (or Lotus + Element), start a device verification. On the **Ready** step you now see your own QR code plus a **"Scan their QR code"** button and a **"Verify with emoji instead"** fallback. Have one device **scan** the other's code (grant camera permission) → the showing device asks you to **Confirm**, and both reach **verified**. Check: emoji-SAS still works unchanged; denying camera shows a graceful "verify with emojis instead" message; a deliberately-wrong scan cancels cleanly. Desktop (WebView2) auto-grants the camera; web needs the Permissions-Policy camera allowance (already set).
+
+**Disappearing Messages (MSC1763 `m.room.retention`, 2026-07):** In Room Settings → General → **Message Retention**, an admin picks Off / 1 Day / 1 Week / 1 Month (non-admins see the buttons disabled). After setting e.g. 1 Day, messages older than a day **vanish from the timeline** for everyone in Lotus (toggle Settings → General → **Show Hidden Events** to reveal them again). Setting back to **Off** restores them. Separately, each user can enable Settings → General → **Enforce Message Retention** (default OFF) → their OWN expired messages then get **permanently redacted** within ~30 s (verify: OTHER people's messages are NEVER redacted by this; only your own). Note true server-side purge also needs Synapse `retention:` configured.
+
+**Mark as Unread + Low Priority (MSC2867 / m.lowpriority, 2026-07):** Right-click a room in the sidebar → **Mark as Unread** puts a dot on the row (bold name) even with no new messages; opening/reading the room clears it, and it syncs to another device. **Mark as Read** on a marked room clears it too. Right-click → **Add to Low Priority** moves the room into a collapsed "Low Priority" category at the bottom of the room list (and removes it from Favorites if it was there, and vice-versa); **Remove from Low Priority** returns it to Rooms.
+
+**Windows rich toast (D6, 2026-07 — desktop/Windows build only):** get a message notification while the desktop app is backgrounded → the toast is attributed to **Lotus Chat** (not "PowerShell"/generic) and shows an inline **reply box + Send**; typing a reply + Send **posts it to that room**; clicking the toast body **opens the room**. Previously these silently fell back to a plain toast (no reply/click). If it still falls back, check that a `Lotus Chat.lnk` exists in the Start-Menu Programs folder.
+
+**Invite QR is now generated LOCALLY (2026-07):** Room settings → Share Room → the QR code renders (a black-on-white SVG in a white box) with **no network request** to `api.qrserver.com` (check DevTools Network — there should be no external QR fetch, and it should work offline / behind strict CSP). **Scan it** with a phone camera / Matrix app → it opens the correct `matrix.to` room-invite link. (`api.qrserver.com` was removed from the prod CSP img-src, so a regression would make the QR blank rather than silently phone home.)
+
+**Unread dot on federated rooms + avatar-decoration console storm (2026-07):**
+
+- **Read receipts (regression guard — highest priority):** open several rooms and open the Home/Direct tabs (which mark all orphan rooms read on mount) → rooms **stay read**, unread dots clear and don't come back. (A prior attempt sent a receipt for the thread _root_ when a thread's replies weren't loaded, which the SDK treats as a main receipt at an old event and re-unread every room on every mark-read. Fixed + locked by `notifications.test.ts`.)
+- **Thread dot:** a room with an unread reply in a thread whose replies are loaded → its dot clears on read; for a thread not yet loaded, the dot clears once you open/load the thread. (mark-as-read now sends a threaded receipt only for a genuine loaded reply, never the root.)
+- With DevTools console open on federated rooms, the `io.lotus.avatar_decoration` `403`/`502` (and federated media) errors should **not** repeat on every scroll/mount — each failing user is now requested at most ~twice per session, so the storm (and its homeserver load) is gone.
+
+**Custom Window Chrome (Beta) fix (2026-07):** on the desktop build, Settings → General → toggle **Custom Window Chrome** — it should reload and come up with the Lotus title bar and a normal, stable feed (no screen-expand / auto-scroll-into-the-past). Toggle back off → reloads to the native frame.
+
 _Ported from the retired `LOTUS_BUGS.md` (2026-07). Compact index of shipped-but-not-live-tested items; the detailed steps are in the lettered sections above._
 
 Implemented and gate-green; confirm each per `LOTUS_TESTING.md`, then delete the row.

eslint.config.mjs

@@ -144,10 +144,16 @@ export default [
     },
   },
   {
-    // Test files commonly define several small mock/fake classes.
+    // Test files commonly define several small mock/fake classes and named
+    // function expressions used as constructor mocks (e.g.
+    // `setGlobal('AudioWorkletNode', function AudioWorkletNode(){})`), which must
+    // NOT be rewritten to arrows (arrows aren't constructable). Relax the
+    // stylistic class/callback rules here.
     files: ['**/*.test.ts', '**/*.test.tsx'],
     rules: {
       'max-classes-per-file': 'off',
+      'lines-between-class-members': 'off',
+      'prefer-arrow-callback': 'off',
     },
   },
 ];

package-lock.json

@@ -49,6 +49,7 @@
         "immer": "11.1.8",
         "is-hotkey": "0.2.0",
         "jotai": "2.20.0",
+        "jsqr": "1.4.0",
         "katex": "0.16.11",
         "linkify-react": "4.3.3",
         "linkifyjs": "4.3.3",
@@ -57,6 +58,8 @@
         "millify": "6.1.0",
         "pdfjs-dist": "5.7.284",
         "prismjs": "1.30.0",
+        "qrcode": "1.5.4",
+        "qrcode.react": "4.2.0",
         "react": "19.2.6",
         "react-aria": "3.48.0",
         "react-blurhash": "0.3.0",
@@ -86,6 +89,7 @@
         "@types/katex": "0.16.8",
         "@types/node": "25.9.1",
         "@types/prismjs": "1.26.6",
+        "@types/qrcode": "1.5.6",
         "@types/react": "19.2.15",
         "@types/react-dom": "19.2.3",
         "@types/react-google-recaptcha": "2.1.9",
@@ -3989,6 +3993,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/qrcode": {
+      "version": "1.5.6",
+      "resolved": "https://registry.npmjs.org/@types/qrcode/-/qrcode-1.5.6.tgz",
+      "integrity": "sha512-te7NQcV2BOvdj2b1hCAHzAoMNuj65kNBMz0KBaxM6c3VGBOhU0dURQKOtH8CFNI/dsKkwlv32p26qYQTWoB5bw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/react": {
       "version": "19.2.15",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.15.tgz",
@@ -5170,6 +5184,15 @@
         "node": ">=6"
       }
     },
+    "node_modules/camelcase": {
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
+      "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/camelize": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/camelize/-/camelize-1.0.1.tgz",
@@ -5964,6 +5987,15 @@
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       }
     },
+    "node_modules/decamelize": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
+      "integrity": "sha512-z2S+W9X73hAUUki+N+9Za2lBlun89zigOyGrsax+KUQ6wKW4ZoWpEYBkGhQjwAjjDCkWxhY0VKEhk8wzY7F5cA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/dedent": {
       "version": "1.7.2",
       "resolved": "https://registry.npmjs.org/dedent/-/dedent-1.7.2.tgz",
@@ -6107,6 +6139,12 @@
         "node": ">=8"
       }
     },
+    "node_modules/dijkstrajs": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/dijkstrajs/-/dijkstrajs-1.0.3.tgz",
+      "integrity": "sha512-qiSlmBq9+BCdCA/L46dw8Uy93mloxsPSbwnm5yrKn2vMPiy8KyAskTF6zuV/j5BMsmOGZDPs7KjU+mjb670kfA==",
+      "license": "MIT"
+    },
     "node_modules/direction": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/direction/-/direction-1.0.4.tgz",
@@ -9056,6 +9094,12 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/jsqr": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/jsqr/-/jsqr-1.4.0.tgz",
+      "integrity": "sha512-dxLob7q65Xg2DvstYkRpkYtmKm2sPJ9oFhrhmudT1dZvNFFTlroai3AWSpLey/w5vMcLBXRgOJsbXpdN9HzU/A==",
+      "license": "Apache-2.0"
+    },
     "node_modules/jsx-ast-utils": {
       "version": "3.3.5",
       "resolved": "https://registry.npmjs.org/jsx-ast-utils/-/jsx-ast-utils-3.3.5.tgz",
@@ -10499,6 +10543,15 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/p-try": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
+      "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/package-json-from-dist": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/package-json-from-dist/-/package-json-from-dist-1.0.1.tgz",
@@ -10536,7 +10589,6 @@
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       "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
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-      "dev": true,
       "engines": {
         "node": ">=8"
       }
@@ -10651,6 +10703,15 @@
         "pathe": "^2.0.1"
       }
     },
+    "node_modules/pngjs": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/pngjs/-/pngjs-5.0.0.tgz",
+      "integrity": "sha512-40QW5YalBNfQo5yRYmiw7Yz6TKKVr3h6970B2YE+3fQpsWcrbj1PzJgxeJ19DRQjhMbKPIuMY8rFaXc8moolVw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.13.0"
+      }
+    },
     "node_modules/possible-typed-array-names": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/possible-typed-array-names/-/possible-typed-array-names-1.0.0.tgz",
@@ -10758,6 +10819,150 @@
         "node": ">=6"
       }
     },
+    "node_modules/qrcode": {
+      "version": "1.5.4",
+      "resolved": "https://registry.npmjs.org/qrcode/-/qrcode-1.5.4.tgz",
+      "integrity": "sha512-1ca71Zgiu6ORjHqFBDpnSMTR2ReToX4l1Au1VFLyVeBTFavzQnv5JxMFr3ukHVKpSrSA2MCk0lNJSykjUfz7Zg==",
+      "license": "MIT",
+      "dependencies": {
+        "dijkstrajs": "^1.0.1",
+        "pngjs": "^5.0.0",
+        "yargs": "^15.3.1"
+      },
+      "bin": {
+        "qrcode": "bin/qrcode"
+      },
+      "engines": {
+        "node": ">=10.13.0"
+      }
+    },
+    "node_modules/qrcode.react": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/qrcode.react/-/qrcode.react-4.2.0.tgz",
+      "integrity": "sha512-QpgqWi8rD9DsS9EP3z7BT+5lY5SFhsqGjpgW5DY/i3mK4M9DTBNz3ErMi8BWYEfI3L0d8GIbGmcdFAS1uIRGjA==",
+      "license": "ISC",
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
+    "node_modules/qrcode/node_modules/cliui": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-6.0.0.tgz",
+      "integrity": "sha512-t6wbgtoCXvAzst7QgXxJYqPt0usEfbgQdftEPbLL/cvv6HPE5VgvqCuAIDR0NgU52ds6rFwqrgakNLrHEjCbrQ==",
+      "license": "ISC",
+      "dependencies": {
+        "string-width": "^4.2.0",
+        "strip-ansi": "^6.0.0",
+        "wrap-ansi": "^6.2.0"
+      }
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+      "license": "MIT",
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+        "path-exists": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
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+      "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-5.0.0.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "p-locate": "^4.1.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/qrcode/node_modules/p-limit": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.3.0.tgz",
+      "integrity": "sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w==",
+      "license": "MIT",
+      "dependencies": {
+        "p-try": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/qrcode/node_modules/p-locate": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-4.1.0.tgz",
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+      "dependencies": {
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+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/qrcode/node_modules/wrap-ansi": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "ansi-styles": "^4.0.0",
+        "string-width": "^4.1.0",
+        "strip-ansi": "^6.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/qrcode/node_modules/y18n": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.3.tgz",
+      "integrity": "sha512-JKhqTOwSrqNA1NY5lSztJ1GrBiUodLMmIZuLiDaMRJ+itFd+ABVE8XBjOvIWL+rSqNDC74LCSFmlb/U4UZ4hJQ==",
+      "license": "ISC"
+    },
+    "node_modules/qrcode/node_modules/yargs": {
+      "version": "15.4.1",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
+      "integrity": "sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==",
+      "license": "MIT",
+      "dependencies": {
+        "cliui": "^6.0.0",
+        "decamelize": "^1.2.0",
+        "find-up": "^4.1.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^4.2.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^18.1.2"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/qrcode/node_modules/yargs-parser": {
+      "version": "18.1.3",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
+      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
+      "license": "ISC",
+      "dependencies": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      },
+      "engines": {
+        "node": ">=6"
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     "node_modules/raf-schd": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/raf-schd/-/raf-schd-4.0.3.tgz",
@@ -11178,6 +11383,12 @@
         "node": "*"
       }
     },
+    "node_modules/require-main-filename": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
+      "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
+      "license": "ISC"
+    },
     "node_modules/resize-observer-polyfill": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/resize-observer-polyfill/-/resize-observer-polyfill-1.5.1.tgz",
@@ -11508,6 +11719,12 @@
         "node": ">=20.0.0"
       }
     },
+    "node_modules/set-blocking": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
+      "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
+      "license": "ISC"
+    },
     "node_modules/set-cookie-parser": {
       "version": "2.7.2",
       "resolved": "https://registry.npmjs.org/set-cookie-parser/-/set-cookie-parser-2.7.2.tgz",
@@ -12973,6 +13190,12 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/which-module": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.1.tgz",
+      "integrity": "sha512-iBdZ57RDvnOR9AGBhML2vFZf7h8vmBjhoaZqODJBFWHVtKkDmKuHai3cx5PgVMrX5YDNp27AofYbAwctSS+vhQ==",
+      "license": "ISC"
+    },
     "node_modules/which-typed-array": {
       "version": "1.1.20",
       "resolved": "https://registry.npmjs.org/which-typed-array/-/which-typed-array-1.1.20.tgz",

package.json

@@ -74,6 +74,7 @@
     "immer": "11.1.8",
     "is-hotkey": "0.2.0",
     "jotai": "2.20.0",
+    "jsqr": "1.4.0",
     "katex": "0.16.11",
     "linkify-react": "4.3.3",
     "linkifyjs": "4.3.3",
@@ -82,6 +83,8 @@
     "millify": "6.1.0",
     "pdfjs-dist": "5.7.284",
     "prismjs": "1.30.0",
+    "qrcode": "1.5.4",
+    "qrcode.react": "4.2.0",
     "react": "19.2.6",
     "react-aria": "3.48.0",
     "react-blurhash": "0.3.0",
@@ -111,6 +114,7 @@
     "@types/katex": "0.16.8",
     "@types/node": "25.9.1",
     "@types/prismjs": "1.26.6",
+    "@types/qrcode": "1.5.6",
     "@types/react": "19.2.15",
     "@types/react-dom": "19.2.3",
     "@types/react-google-recaptcha": "2.1.9",

src/app/components/CallEmbedProvider.tsx

@@ -56,6 +56,7 @@ import { useRoomNavigate } from '../hooks/useRoomNavigate';
 import { getChatBg } from '../features/lotus/chatBackground';
 import { ExitFullscreenIcon, FullscreenIcon } from '../features/call/Controls';
 import { useTheme, ThemeKind } from '../hooks/useTheme';
+import { useReducedMotion } from '../hooks/useReducedMotion';
 import { useSetting } from '../state/hooks/settings';
 import { settingsAtom } from '../state/settings';
 import { getStateEvent, getStateEvents, getMemberDisplayName } from '../utils/room';
@@ -413,6 +414,16 @@ function IncomingCallListener({ callEmbed, joined }: IncomingCallListenerProps)
   const dm = callInfo ? directs.has(callInfo.room.roomId) : false;
   const startCall = useCallStart(dm);
 
+  // C-L6: handleTimelineEvent awaits decryption before calling setState; guard
+  // against the component unmounting during that await.
+  const mountedRef = useRef(true);
+  useEffect(
+    () => () => {
+      mountedRef.current = false;
+    },
+    [],
+  );
+
   const handleTimelineEvent: EventTimelineSetHandlerMap[RoomEvent.Timeline] = useCallback(
     async (event, room, toStartOfTimeline, removed, data) => {
       // only process rtc notification reference events.
@@ -427,6 +438,9 @@ function IncomingCallListener({ callEmbed, joined }: IncomingCallListenerProps)
         await event.getDecryptionPromise();
       }
 
+      // C-L6: bail if we unmounted while awaiting decryption above.
+      if (!mountedRef.current) return;
+
       // Caller-side: a participant declined a call we're hosting in this room.
       // Without this the caller's UI keeps "ringing" until the notification
       // lifetime expires, with no indication the callee said no.
@@ -706,9 +720,10 @@ export function CallEmbedProvider({ children }: CallEmbedProviderProps) {
   const theme = useTheme();
   const isDark = theme.kind === ThemeKind.Dark;
   const [chatBackground] = useSetting(settingsAtom, 'chatBackground');
+  const reduced = useReducedMotion();
   const wallpaperStyle = React.useMemo(
-    () => getChatBg(chatBackground, isDark),
-    [chatBackground, isDark],
+    () => getChatBg(chatBackground, isDark, reduced),
+    [chatBackground, isDark, reduced],
   );
 
   const [pipIsFullscreen, setPipIsFullscreen] = useState(false);

src/app/components/DeviceVerification.tsx

@@ -1,12 +1,14 @@
 import {
+  ShowQrCodeCallbacks,
   ShowSasCallbacks,
   VerificationPhase,
   VerificationRequest,
   Verifier,
 } from 'matrix-js-sdk/lib/crypto-api';
-import React, { CSSProperties, useCallback, useEffect, useState } from 'react';
+import React, { CSSProperties, useCallback, useEffect, useRef, useState } from 'react';
 import { useTranslation } from 'react-i18next';
 import { VerificationMethod } from 'matrix-js-sdk/lib/types';
+import QRCode from 'qrcode';
 import {
   Box,
   Button,
@@ -27,11 +29,13 @@ import {
   useVerificationRequestPhase,
   useVerificationRequestReceived,
   useVerifierCancel,
+  useVerifierShowReciprocateQr,
   useVerifierShowSas,
 } from '../hooks/useVerificationRequest';
 import { AsyncStatus, useAsyncCallback } from '../hooks/useAsyncCallback';
 import { ContainerColor } from '../styles/ContainerColor.css';
 import { useModalStyle } from '../hooks/useModalStyle';
+import { QrScanner } from './QrScanner';
 
 const DialogHeaderStyles: CSSProperties = {
   padding: `0 ${config.space.S200} 0 ${config.space.S400}`,
@@ -97,32 +101,6 @@ function VerificationAccept({ onAccept }: VerificationAcceptProps) {
   );
 }
 
-function VerificationWaitStart() {
-  const { t } = useTranslation();
-  return (
-    <Box direction="Column" gap="400">
-      <Text>{t('Organisms.DeviceVerification.request_accepted')}</Text>
-      <WaitingMessage message={t('Organisms.DeviceVerification.waiting_response')} />
-    </Box>
-  );
-}
-
-type VerificationStartProps = {
-  onStart: () => Promise<void>;
-};
-function AutoVerificationStart({ onStart }: VerificationStartProps) {
-  const { t } = useTranslation();
-  useEffect(() => {
-    onStart();
-  }, [onStart]);
-
-  return (
-    <Box direction="Column" gap="400">
-      <WaitingMessage message={t('Organisms.DeviceVerification.starting_emoji')} />
-    </Box>
-  );
-}
-
 function CompareEmoji({ sasData }: { sasData: ShowSasCallbacks }) {
   const { t } = useTranslation();
   const [confirmState, confirm] = useAsyncCallback(useCallback(() => sasData.confirm(), [sasData]));
@@ -237,6 +215,120 @@ function VerificationCanceled({ onClose }: VerificationCanceledProps) {
   );
 }
 
+function QrCodeImage({ data }: { data: Uint8ClampedArray }) {
+  const canvasRef = useRef<HTMLCanvasElement>(null);
+  useEffect(() => {
+    const canvas = canvasRef.current;
+    if (!canvas) return;
+    // Byte-mode so the raw verification bytes round-trip (a string value would
+    // mangle high bytes via UTF-8).
+    QRCode.toCanvas(canvas, [{ data: new Uint8Array(data), mode: 'byte' }], {
+      width: 220,
+      margin: 2,
+      color: { dark: '#000000', light: '#ffffff' },
+    }).catch(() => undefined);
+  }, [data]);
+  return (
+    <Box justifyContent="Center">
+      <canvas ref={canvasRef} style={{ borderRadius: config.radii.R300 }} />
+    </Box>
+  );
+}
+
+type VerificationReadyProps = {
+  request: VerificationRequest;
+  onStartSas: () => void;
+  onScanned: (bytes: Uint8ClampedArray) => void;
+};
+function VerificationReady({ request, onStartSas, onScanned }: VerificationReadyProps) {
+  const [myQr, setMyQr] = useState<Uint8ClampedArray>();
+  const [scanning, setScanning] = useState(false);
+  const canShowMine = request.otherPartySupportsMethod(VerificationMethod.ScanQrCode);
+  const canScanTheirs = request.otherPartySupportsMethod(VerificationMethod.ShowQrCode);
+
+  useEffect(() => {
+    if (!canShowMine) return;
+    request
+      .generateQRCode()
+      .then((bytes) => {
+        if (bytes) setMyQr(bytes);
+      })
+      .catch(() => undefined);
+  }, [request, canShowMine]);
+
+  if (scanning) {
+    return <QrScanner onScan={onScanned} onCancel={() => setScanning(false)} />;
+  }
+
+  return (
+    <Box direction="Column" gap="400">
+      {myQr && (
+        <Box direction="Column" gap="200">
+          <Text size="T300">Scan this code with your other device to verify.</Text>
+          <QrCodeImage data={myQr} />
+        </Box>
+      )}
+      <Box direction="Column" gap="200">
+        {canScanTheirs && (
+          <Button variant="Primary" fill="Solid" onClick={() => setScanning(true)}>
+            <Text size="B400">Scan their QR code</Text>
+          </Button>
+        )}
+        <Button variant="Secondary" fill="Soft" onClick={onStartSas}>
+          <Text size="B400">Verify with emoji instead</Text>
+        </Button>
+      </Box>
+    </Box>
+  );
+}
+
+type ReciprocateVerificationProps = {
+  verifier: Verifier;
+  onCancel: () => void;
+};
+function ReciprocateVerification({ verifier, onCancel }: ReciprocateVerificationProps) {
+  const [qrCallbacks, setQrCallbacks] = useState<ShowQrCodeCallbacks>();
+  const [confirmState, confirm] = useAsyncCallback(
+    useCallback(async () => qrCallbacks?.confirm(), [qrCallbacks]),
+  );
+
+  useVerifierShowReciprocateQr(verifier, setQrCallbacks);
+  useVerifierCancel(verifier, onCancel);
+
+  const confirming =
+    confirmState.status === AsyncStatus.Loading || confirmState.status === AsyncStatus.Success;
+
+  // The showing side gets ShowReciprocateQr callbacks after the other device
+  // scans; the scanning side never does (it already called verify()) and just
+  // waits for completion.
+  if (!qrCallbacks) {
+    return (
+      <Box direction="Column" gap="400">
+        <WaitingMessage message="Verifying…" />
+      </Box>
+    );
+  }
+
+  return (
+    <Box direction="Column" gap="400">
+      <Text>The other device scanned this code. Confirm it now shows as verified.</Text>
+      <Box direction="Column" gap="200">
+        <Button variant="Primary" fill="Soft" onClick={confirm} disabled={confirming}>
+          <Text size="B400">Confirm</Text>
+        </Button>
+        <Button
+          variant="Primary"
+          fill="Soft"
+          onClick={() => qrCallbacks.cancel()}
+          disabled={confirming}
+        >
+          <Text size="B400">Cancel</Text>
+        </Button>
+      </Box>
+    </Box>
+  );
+}
+
 type DeviceVerificationProps = {
   request: VerificationRequest;
   onExit: () => void;
@@ -256,6 +348,17 @@ export function DeviceVerification({ request, onExit }: DeviceVerificationProps)
   const handleStart = useCallback(async () => {
     await request.startVerification(VerificationMethod.Sas);
   }, [request]);
+  const handleScanned = useCallback(
+    async (bytes: Uint8ClampedArray) => {
+      try {
+        const verifier = await request.scanQRCode(bytes);
+        await verifier.verify();
+      } catch {
+        // A bad/mismatched scan cancels the request; the Cancelled phase renders.
+      }
+    },
+    [request],
+  );
 
   return (
     <Overlay open backdrop={<OverlayBackdrop />}>
@@ -290,15 +393,20 @@ export function DeviceVerification({ request, onExit }: DeviceVerificationProps)
                 ) : (
                   <VerificationAccept onAccept={handleAccept} />
                 ))}
-              {phase === VerificationPhase.Ready &&
-                (request.initiatedByMe ? (
-                  <AutoVerificationStart onStart={handleStart} />
-                ) : (
-                  <VerificationWaitStart />
-                ))}
+              {phase === VerificationPhase.Ready && (
+                <VerificationReady
+                  request={request}
+                  onStartSas={handleStart}
+                  onScanned={handleScanned}
+                />
+              )}
               {phase === VerificationPhase.Started &&
                 (request.verifier ? (
-                  <SasVerification verifier={request.verifier} onCancel={handleCancel} />
+                  request.chosenMethod === VerificationMethod.Reciprocate ? (
+                    <ReciprocateVerification verifier={request.verifier} onCancel={handleCancel} />
+                  ) : (
+                    <SasVerification verifier={request.verifier} onCancel={handleCancel} />
+                  )
                 ) : (
                   <VerificationUnexpected
                     message="Unexpected Error! Verification is started but verifier is missing."

src/app/components/QrScanner.tsx

@@ -0,0 +1,101 @@
+import React, { useEffect, useRef, useState } from 'react';
+import { Box, Button, color, config, Text } from 'folds';
+import jsQR from 'jsqr';
+
+type QrScannerProps = {
+  onScan: (bytes: Uint8ClampedArray) => void;
+  onCancel: () => void;
+};
+
+// Camera QR scanner. Decodes frames with jsQR and hands back the raw byte
+// segment (`result.binaryData`) — Matrix QR verification needs the raw bytes,
+// not a decoded string, so the string-only `BarcodeDetector` can't be used.
+export function QrScanner({ onScan, onCancel }: QrScannerProps) {
+  const videoRef = useRef<HTMLVideoElement>(null);
+  const [error, setError] = useState<string>();
+  const doneRef = useRef(false);
+
+  useEffect(() => {
+    let stream: MediaStream | undefined;
+    let raf = 0;
+    const canvas = document.createElement('canvas');
+    const ctx = canvas.getContext('2d', { willReadFrequently: true });
+
+    const tick = () => {
+      const video = videoRef.current;
+      if (!doneRef.current && video && ctx && video.readyState === video.HAVE_ENOUGH_DATA) {
+        canvas.width = video.videoWidth;
+        canvas.height = video.videoHeight;
+        ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
+        const image = ctx.getImageData(0, 0, canvas.width, canvas.height);
+        const result = jsQR(image.data, image.width, image.height);
+        if (result && result.binaryData.length > 0) {
+          doneRef.current = true;
+          onScan(new Uint8ClampedArray(result.binaryData));
+          return;
+        }
+      }
+      raf = requestAnimationFrame(tick);
+    };
+
+    (async () => {
+      try {
+        stream = await navigator.mediaDevices.getUserMedia({
+          video: { facingMode: 'environment' },
+        });
+        if (videoRef.current) {
+          videoRef.current.srcObject = stream;
+          await videoRef.current.play();
+        }
+        raf = requestAnimationFrame(tick);
+      } catch {
+        setError(
+          'Could not access the camera. Grant camera permission, or verify with emojis instead.',
+        );
+      }
+    })();
+
+    return () => {
+      doneRef.current = true;
+      cancelAnimationFrame(raf);
+      stream?.getTracks().forEach((track) => track.stop());
+    };
+  }, [onScan]);
+
+  if (error) {
+    return (
+      <Box direction="Column" gap="400">
+        <Text style={{ color: color.Critical.Main }} size="T300">
+          {error}
+        </Text>
+        <Button variant="Secondary" fill="Soft" onClick={onCancel}>
+          <Text size="B400">Back</Text>
+        </Button>
+      </Box>
+    );
+  }
+
+  return (
+    <Box direction="Column" gap="400" alignItems="Center">
+      <Text size="T300" align="Center">
+        Point your camera at the QR code shown on your other device.
+      </Text>
+      <video
+        ref={videoRef}
+        muted
+        playsInline
+        style={{
+          width: '100%',
+          maxWidth: 280,
+          borderRadius: config.radii.R400,
+          background: '#000',
+        }}
+      >
+        <track kind="captions" />
+      </video>
+      <Button variant="Secondary" fill="Soft" onClick={onCancel}>
+        <Text size="B400">Cancel</Text>
+      </Button>
+    </Box>
+  );
+}

src/app/components/avatar-decoration/AvatarDecoration.tsx

@@ -31,6 +31,10 @@ export function AvatarDecoration({
     >
       {children}
       <img
+        // Force a fresh element per slug so a recycled node whose previous slug
+        // 404'd (and was hidden in onError) can't leak `display:none` onto a
+        // valid decoration.
+        key={slug}
         src={decorationUrl(slug)}
         style={{
           position: 'absolute',
@@ -48,6 +52,9 @@ export function AvatarDecoration({
         aria-hidden="true"
         loading="lazy"
         decoding="async"
+        onLoad={(e) => {
+          (e.currentTarget as HTMLImageElement).style.removeProperty('display');
+        }}
         onError={(e) => {
           (e.currentTarget as HTMLImageElement).style.display = 'none';
         }}

src/app/components/message/content/AudioContent.tsx

@@ -99,9 +99,21 @@ export function AudioContent({
   const [playbackSpeed, setPlaybackSpeed] = useState<0.75 | 1 | 1.5 | 2>(1);
 
   useEffect(() => {
-    if (audioRef.current) {
-      audioRef.current.playbackRate = playbackSpeed;
-    }
+    const audio = audioRef.current;
+    if (!audio) return undefined;
+    const applyRate = () => {
+      audio.playbackRate = playbackSpeed;
+    };
+    // Apply immediately, and re-apply whenever the media element (re)loads a new
+    // source — e.g. after async decrypt swaps in the blob URL — since the browser
+    // resets playbackRate to 1 on load, discarding the user's speed choice.
+    applyRate();
+    audio.addEventListener('loadedmetadata', applyRate);
+    audio.addEventListener('play', applyRate);
+    return () => {
+      audio.removeEventListener('loadedmetadata', applyRate);
+      audio.removeEventListener('play', applyRate);
+    };
   }, [playbackSpeed]);
 
   const SPEED_STEPS: Array<0.75 | 1 | 1.5 | 2> = [0.75, 1, 1.5, 2];

src/app/components/seasonal/SeasonalEffect.tsx

@@ -1,6 +1,7 @@
 import React, { useMemo } from 'react';
 import { useAtomValue } from 'jotai';
 import { settingsAtom } from '../../state/settings';
+import { useReducedMotion } from '../../hooks/useReducedMotion';
 import { zIndices } from '../../styles/zIndex';
 import { SeasonTheme } from './types';
 import { getActiveSeason } from './seasonSchedule';
@@ -94,8 +95,7 @@ export function SeasonalPreview({ theme }: { theme: SeasonTheme }) {
 
 export function SeasonalEffect() {
   const settings = useAtomValue(settingsAtom);
-  const reduced =
-    typeof window !== 'undefined' && window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+  const reduced = useReducedMotion();
 
   const theme = useMemo<SeasonTheme | null>(() => {
     const override = settings.seasonalThemeOverride ?? 'auto';

src/app/features/call/CallControls.tsx

@@ -1,4 +1,5 @@
 import React, { MouseEventHandler, useCallback, useEffect, useRef, useState } from 'react';
+import { useSetAtom } from 'jotai';
 import {
   Box,
   Button,
@@ -32,6 +33,7 @@ import {
 import { CallEmbed, useCallControlState } from '../../plugins/call';
 import { useSetting } from '../../state/hooks/settings';
 import { settingsAtom } from '../../state/settings';
+import { callEmbedAtom } from '../../state/callEmbed';
 import { useResizeObserver } from '../../hooks/useResizeObserver';
 import { stopPropagation } from '../../utils/keyboard';
 import { AsyncStatus, useAsyncCallback } from '../../hooks/useAsyncCallback';
@@ -48,6 +50,7 @@ type CallControlsProps = {
 export function CallControls({ callEmbed }: CallControlsProps) {
   const controlRef = useRef<HTMLDivElement>(null);
   const callEmbedRef = useCallEmbedRef();
+  const setCallEmbed = useSetAtom(callEmbedAtom);
   const [compact, setCompact] = useState(document.body.clientWidth < 500);
   const [isFullscreen, setIsFullscreen] = useState(false);
 
@@ -175,22 +178,28 @@ export function CallControls({ callEmbed }: CallControlsProps) {
       };
       if (isEditable(target)) return;
       e.preventDefault();
+      // C-M5: mark PTT active BEFORE unmuting so the mic echo (onMediaState)
+      // doesn't treat this transient unmute as a user-initiated undeafen.
+      callEmbed.control.pttActive = true;
       if (!microphoneRef.current) callEmbed.control.setMicrophone(true);
       pttActiveRef.current = true;
       setPttActive(true);
     };
     const onKeyUp = (e: KeyboardEvent) => {
       if (e.code !== pttKey) return;
+      callEmbed.control.pttActive = false;
       callEmbed.control.setMicrophone(false);
       pttActiveRef.current = false;
       setPttActive(false);
     };
     const onBlur = () => {
+      callEmbed.control.pttActive = false;
       callEmbed.control.setMicrophone(false);
       pttActiveRef.current = false;
       setPttActive(false);
     };
     const onFocus = () => {
+      callEmbed.control.pttActive = false;
       callEmbed.control.setMicrophone(false);
       pttActiveRef.current = false;
       setPttActive(false);
@@ -215,6 +224,7 @@ export function CallControls({ callEmbed }: CallControlsProps) {
       iframeWindow?.removeEventListener('focus', onFocus);
       // BUG-8: if callEmbed changes while PTT is active, release mic on cleanup
       if (pttActiveRef.current) {
+        callEmbed.control.pttActive = false;
         callEmbed.control.setMicrophone(false);
         pttActiveRef.current = false;
         setPttActive(false);
@@ -242,8 +252,15 @@ export function CallControls({ callEmbed }: CallControlsProps) {
       e.preventDefault();
       callEmbed.control.toggleSound();
     };
+    // C-L4: also bind the EC iframe window so the deafen key works when focus is
+    // inside the iframe (mirrors the PTT binding above).
+    const iframeWindow = callEmbed.iframe.contentWindow;
     window.addEventListener('keydown', onKeyDown);
-    return () => window.removeEventListener('keydown', onKeyDown);
+    iframeWindow?.addEventListener('keydown', onKeyDown);
+    return () => {
+      window.removeEventListener('keydown', onKeyDown);
+      iframeWindow?.removeEventListener('keydown', onKeyDown);
+    };
   }, [callEmbed, deafenKey]);
 
   const [hangupState, hangup] = useAsyncCallback(
@@ -252,6 +269,19 @@ export function CallControls({ callEmbed }: CallControlsProps) {
   const exiting =
     hangupState.status === AsyncStatus.Loading || hangupState.status === AsyncStatus.Success;
 
+  // C-M4: the normal teardown relies on EC echoing a Close/Hangup action after
+  // it ACKs HangupCall (useCallHangupEvent -> clears callEmbedAtom -> dispose).
+  // If EC ACKs but never echoes, the End button would spin forever. Fall back to
+  // disposing the embed a few seconds after a successful hangup send, unless it
+  // was already torn down by the normal path.
+  useEffect(() => {
+    if (hangupState.status !== AsyncStatus.Success) return undefined;
+    const id = setTimeout(() => {
+      if (!callEmbed.disposed) setCallEmbed(undefined);
+    }, 4000);
+    return () => clearTimeout(id);
+  }, [hangupState.status, callEmbed, setCallEmbed]);
+
   const pttKeyLabel = pttKey === 'Space' ? 'SPACE' : pttKey.replace('Key', '').replace('Digit', '');
 
   return (

src/app/features/call/CallSoundboard.tsx

@@ -1,4 +1,4 @@
-import React, { MouseEventHandler, useCallback, useMemo, useState } from 'react';
+import React, { MouseEventHandler, useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import {
   Box,
   Icon,
@@ -64,6 +64,16 @@ export function CallSoundboard({ callEmbed }: CallSoundboardProps) {
   const [playingKey, setPlayingKey] = useState<string>(); // host-side spam guard
   const [error, setError] = useState<string>();
 
+  // C-L6: the play() flow schedules a 30s safety timeout that clears playingKey;
+  // guard those setState calls against the component unmounting first.
+  const mountedRef = useRef(true);
+  useEffect(
+    () => () => {
+      mountedRef.current = false;
+    },
+    [],
+  );
+
   const groups = useMemo(
     () =>
       packs
@@ -86,7 +96,10 @@ export function CallSoundboard({ callEmbed }: CallSoundboardProps) {
       if (playingKey) return; // one at a time (fork also enforces this)
       setPlayingKey(flat.key);
       setError(undefined);
-      const done = () => setPlayingKey((k) => (k === flat.key ? undefined : k));
+      const done = () => {
+        if (!mountedRef.current) return;
+        setPlayingKey((k) => (k === flat.key ? undefined : k));
+      };
       try {
         const url = await resolveClipObjectUrl(mx, flat.clip.url);
         const vol = (flat.clip.volume / 100) * master;

src/app/features/common-settings/general/RoomRetention.tsx

@@ -0,0 +1,80 @@
+import React, { useCallback } from 'react';
+import { Box, Button, color, Spinner, Text } from 'folds';
+import { MatrixError } from 'matrix-js-sdk';
+import { SequenceCard } from '../../../components/sequence-card';
+import { SequenceCardStyle } from '../../room-settings/styles.css';
+import { SettingTile } from '../../../components/setting-tile';
+import { useMatrixClient } from '../../../hooks/useMatrixClient';
+import { useRoom } from '../../../hooks/useRoom';
+import { StateEvent } from '../../../../types/matrix/room';
+import { AsyncStatus, useAsyncCallback } from '../../../hooks/useAsyncCallback';
+import { useStateEvent } from '../../../hooks/useStateEvent';
+import { RoomPermissionsAPI } from '../../../hooks/useRoomPermissions';
+import { RetentionContent, RETENTION_PRESETS } from '../../../utils/retention';
+
+type RoomRetentionProps = {
+  permissions: RoomPermissionsAPI;
+};
+export function RoomRetention({ permissions }: RoomRetentionProps) {
+  const mx = useMatrixClient();
+  const room = useRoom();
+
+  const canEdit = permissions.stateEvent(StateEvent.RoomRetention, mx.getSafeUserId());
+
+  const event = useStateEvent(room, StateEvent.RoomRetention);
+  const currentMs = event?.getContent<RetentionContent>().max_lifetime ?? 0;
+
+  const [submitState, submit] = useAsyncCallback(
+    useCallback(
+      async (ms: number) => {
+        const content: RetentionContent = ms > 0 ? { max_lifetime: ms } : {};
+        // Lotus custom-state convention: cast the type key (RoomRetention isn't a
+        // typed key in the SDK's StateEvents map).
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        await mx.sendStateEvent(room.roomId, StateEvent.RoomRetention as any, content);
+      },
+      [mx, room.roomId],
+    ),
+  );
+  const submitting = submitState.status === AsyncStatus.Loading;
+
+  return (
+    <SequenceCard
+      className={SequenceCardStyle}
+      variant="SurfaceVariant"
+      direction="Column"
+      gap="400"
+    >
+      <SettingTile
+        title="Message Retention"
+        description="Messages older than this window disappear from the timeline. Each member can opt in to permanently delete their own expired messages in Settings → General; full server-side deletion also requires homeserver retention to be configured."
+      >
+        <Box gap="200" alignItems="Center" style={{ flexWrap: 'wrap' }}>
+          {RETENTION_PRESETS.map((preset) => {
+            const active = currentMs === preset.ms;
+            return (
+              <Button
+                key={preset.label}
+                type="button"
+                size="300"
+                variant={active ? 'Primary' : 'Secondary'}
+                fill={active ? 'Solid' : 'Soft'}
+                radii="300"
+                disabled={!canEdit || submitting}
+                onClick={() => submit(preset.ms)}
+              >
+                <Text size="B300">{preset.label}</Text>
+              </Button>
+            );
+          })}
+          {submitting && <Spinner size="100" variant="Secondary" />}
+        </Box>
+        {submitState.status === AsyncStatus.Error && (
+          <Text style={{ color: color.Critical.Main }} size="T200">
+            {(submitState.error as MatrixError).message}
+          </Text>
+        )}
+      </SettingTile>
+    </SequenceCard>
+  );
+}

src/app/features/common-settings/general/RoomShareInvite.tsx

@@ -1,5 +1,6 @@
 import React, { useCallback, useState } from 'react';
-import { Box, Button, color, config, Icon, Icons, Text } from 'folds';
+import { Box, Button, config, Icon, Icons, Text } from 'folds';
+import { QRCodeSVG } from 'qrcode.react';
 import { SequenceCard } from '../../../components/sequence-card';
 import { SequenceCardStyle } from '../../room-settings/styles.css';
 import { SettingTile } from '../../../components/setting-tile';
@@ -12,11 +13,9 @@ export function RoomShareInvite() {
   const mx = useMatrixClient();
   const room = useRoom();
   const [copied, setCopied] = useState(false);
-  const [qrError, setQrError] = useState(false);
 
   const domain = mx.getDomain() ?? undefined;
   const inviteUrl = getMatrixToRoom(room.roomId, domain ? [domain] : undefined);
-  const qrSrc = `https://api.qrserver.com/v1/create-qr-code/?size=160x160&data=${encodeURIComponent(inviteUrl)}`;
 
   const handleCopy = useCallback(() => {
     navigator.clipboard.writeText(inviteUrl).then(() => {
@@ -64,35 +63,19 @@ export function RoomShareInvite() {
             </Box>
           </Box>
           <Box justifyContent="Center">
-            {qrError ? (
-              <Box
-                direction="Column"
-                alignItems="Center"
-                justifyContent="Center"
-                gap="100"
-                style={{
-                  width: 160,
-                  height: 160,
-                  borderRadius: config.radii.R300,
-                  background: color.SurfaceVariant.Container,
-                }}
-              >
-                <Icon size="400" src={Icons.Warning} />
-                <Text size="T200" priority="300" align="Center">
-                  QR code unavailable
-                </Text>
-              </Box>
-            ) : (
-              <img
-                src={qrSrc}
-                alt="QR code for room invite link"
-                width={160}
-                height={160}
-                loading="lazy"
-                onError={() => setQrError(true)}
-                style={{ display: 'block', borderRadius: config.radii.R300 }}
-              />
-            )}
+            {/* Generated locally (qrcode.react) — no third-party service, works
+                offline + under strict CSP. White padded quiet-zone so the
+                default black-on-white code scans on any theme. */}
+            <Box
+              style={{
+                padding: config.space.S200,
+                background: '#ffffff',
+                borderRadius: config.radii.R300,
+                lineHeight: 0,
+              }}
+            >
+              <QRCodeSVG value={inviteUrl} size={160} level="M" title="Room invite QR code" />
+            </Box>
           </Box>
         </Box>
       </CutoutCard>

src/app/features/common-settings/general/index.ts

@@ -5,6 +5,7 @@ export * from './RoomJoinRules';
 export * from './RoomProfile';
 export * from './RoomPublish';
 export * from './RoomQuality';
+export * from './RoomRetention';
 export * from './RoomShareInvite';
 export * from './RoomUpgrade';
 export * from './RoomVoiceLimit';

src/app/features/common-settings/permissions/Powers.tsx

@@ -5,6 +5,8 @@ import {
   Button,
   Chip,
   Text,
+  Icon,
+  Icons,
   RectCords,
   PopOut,
   Menu,
@@ -75,15 +77,16 @@ function PeekPermissions({ powerLevels, power, permissionGroups, children }: Pee
                           const hasPower = requiredPower <= power;
 
                           return (
-                            <Text
+                            <Box
                               key={itemIndex}
-                              size="T200"
-                              style={{
-                                color: hasPower ? undefined : color.Critical.Main,
-                              }}
+                              as="span"
+                              alignItems="Center"
+                              gap="100"
+                              style={{ color: hasPower ? undefined : color.Critical.Main }}
                             >
-                              {hasPower ? '✅' : '❌'} {item.name}
-                            </Text>
+                              <Icon size="50" src={hasPower ? Icons.Check : Icons.Cross} />
+                              <Text size="T200">{item.name}</Text>
+                            </Box>
                           );
                         })}
                       </div>

src/app/features/lotus/chatBackground.ts

@@ -137,12 +137,13 @@ const LIGHT: Record<ChatBackground, CSSProperties> = {
 export const getChatBg = (
   bg: ChatBackground,
   isDark: boolean,
-  pauseAnimations?: boolean,
+  // Whether to strip animation (user "pause animations" setting OR OS
+  // prefers-reduced-motion). Supplied by the caller — e.g. via useReducedMotion —
+  // so this function stays pure and SSR-safe (no matchMedia read at call time).
+  suppressAnimation?: boolean,
 ): CSSProperties => {
   const style = isDark ? DARK[bg] : LIGHT[bg];
-  const reducedMotion =
-    typeof window !== 'undefined' && window.matchMedia('(prefers-reduced-motion: reduce)').matches;
-  if ((pauseAnimations || reducedMotion) && style.animation) {
+  if (suppressAnimation && style.animation) {
     const { animation: _anim, ...rest } = style;
     return rest;
   }

src/app/features/room-nav/RoomNavItem.tsx

@@ -1,5 +1,5 @@
 import React, { MouseEventHandler, forwardRef, useCallback, useRef, useState } from 'react';
-import { Room } from 'matrix-js-sdk';
+import { MatrixClient, Room } from 'matrix-js-sdk';
 import {
   Avatar,
   Box,
@@ -38,6 +38,7 @@ import { nameInitials } from '../../utils/common';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { useRoomUnread } from '../../state/hooks/unread';
 import { roomToUnreadAtom } from '../../state/room/roomToUnread';
+import { markedUnreadAtom, setMarkedUnread } from '../../state/room/markedUnread';
 import { getPowersLevelFromMatrixEvent, usePowerLevels } from '../../hooks/usePowerLevels';
 import { markAsRead } from '../../utils/notifications';
 import { UseStateProvider } from '../../components/UseStateProvider';
@@ -263,27 +264,46 @@ function RenameRoomDialog({ room, onClose }: RenameRoomDialogProps) {
 }
 
 // localStorage key for timed mute timers
-const MUTE_TIMERS_KEY = 'io.lotus.mute_timers';
+export const MUTE_TIMERS_KEY = 'io.lotus.mute_timers';
 
-type MuteTimerEntry = { roomId: string; unmuteAt: number };
+// setTimeout's delay is a signed 32-bit int; larger values overflow and fire
+// immediately. Clamp long delays to this max (~24.8 days).
+export const MAX_MUTE_TIMEOUT_MS = 2_147_483_647;
 
-function loadMuteTimers(): MuteTimerEntry[] {
+export type MuteTimerEntry = { roomId: string; unmuteAt: number };
+
+export function loadMuteTimers(): MuteTimerEntry[] {
   try {
-    return JSON.parse(localStorage.getItem(MUTE_TIMERS_KEY) ?? '[]');
+    const parsed = JSON.parse(localStorage.getItem(MUTE_TIMERS_KEY) ?? '[]');
+    return Array.isArray(parsed) ? parsed : [];
   } catch {
     return [];
   }
 }
 
-function saveMuteTimers(timers: MuteTimerEntry[]): void {
+export function saveMuteTimers(timers: MuteTimerEntry[]): void {
   localStorage.setItem(MUTE_TIMERS_KEY, JSON.stringify(timers));
 }
 
+// Reverse a timed mute: restore the room's notification mode to Unset and drop
+// its persisted timer. Shared by the in-session timer and the boot-time restore.
+export async function unmuteRoom(mx: MatrixClient, roomId: string): Promise<void> {
+  const { setRoomNotificationPreference } =
+    await import('../../hooks/useRoomsNotificationPreferences');
+  await setRoomNotificationPreference(
+    mx,
+    roomId,
+    RoomNotificationMode.Unset,
+    RoomNotificationMode.Mute,
+  ).catch(() => {});
+  saveMuteTimers(loadMuteTimers().filter((e) => e.roomId !== roomId));
+}
+
 function scheduleMuteTimer(roomId: string, durationMs: number, onUnmute: () => void): void {
   const unmuteAt = Date.now() + durationMs;
   const existing = loadMuteTimers().filter((e) => e.roomId !== roomId);
   saveMuteTimers([...existing, { roomId, unmuteAt }]);
-  setTimeout(onUnmute, durationMs);
+  setTimeout(onUnmute, Math.min(durationMs, MAX_MUTE_TIMEOUT_MS));
 }
 
 type RoomNavItemMenuProps = {
@@ -310,18 +330,39 @@ const RoomNavItemMenu = forwardRef<HTMLDivElement, RoomNavItemMenuProps>(
     const isServerNotice = room.getType() === 'm.server_notice';
 
     const isFavorite = !!room.tags?.['m.favourite'];
+    const isLowPriority = !!room.tags?.['m.lowpriority'];
 
     const handleToggleFavorite = () => {
       if (isFavorite) {
         mx.deleteRoomTag(room.roomId, 'm.favourite');
       } else {
+        // Favourite and low-priority are mutually exclusive.
+        if (isLowPriority) mx.deleteRoomTag(room.roomId, 'm.lowpriority');
         mx.setRoomTag(room.roomId, 'm.favourite', { order: 0.5 });
       }
       requestClose();
     };
 
+    const handleToggleLowPriority = () => {
+      if (isLowPriority) {
+        mx.deleteRoomTag(room.roomId, 'm.lowpriority');
+      } else {
+        if (isFavorite) mx.deleteRoomTag(room.roomId, 'm.favourite');
+        mx.setRoomTag(room.roomId, 'm.lowpriority', { order: 0.5 });
+      }
+      requestClose();
+    };
+
+    const markedUnread = useAtomValue(markedUnreadAtom).has(room.roomId);
+
     const handleMarkAsRead = () => {
       markAsRead(mx, room.roomId, hideActivity);
+      if (markedUnread) setMarkedUnread(mx, room.roomId, false).catch(() => undefined);
+      requestClose();
+    };
+
+    const handleMarkAsUnread = () => {
+      setMarkedUnread(mx, room.roomId, true).catch(() => undefined);
       requestClose();
     };
 
@@ -338,13 +379,7 @@ const RoomNavItemMenu = forwardRef<HTMLDivElement, RoomNavItemMenuProps>(
         ).catch(() => {});
         if (durationMs !== null) {
           scheduleMuteTimer(room.roomId, durationMs, () => {
-            setRoomNotificationPreference(
-              mx,
-              room.roomId,
-              RoomNotificationMode.Unset,
-              RoomNotificationMode.Mute,
-            ).catch(() => {});
-            saveMuteTimers(loadMuteTimers().filter((e) => e.roomId !== room.roomId));
+            unmuteRoom(mx, room.roomId);
           });
         }
         requestClose();
@@ -380,12 +415,23 @@ const RoomNavItemMenu = forwardRef<HTMLDivElement, RoomNavItemMenuProps>(
             size="300"
             after={<Icon size="100" src={Icons.CheckTwice} />}
             radii="300"
-            disabled={!unread}
+            disabled={!unread && !markedUnread}
           >
             <Text style={{ flexGrow: 1 }} as="span" size="T300" truncate>
               Mark as Read
             </Text>
           </MenuItem>
+          <MenuItem
+            onClick={handleMarkAsUnread}
+            size="300"
+            after={<Icon size="100" src={Icons.MessageUnread} />}
+            radii="300"
+            disabled={!!unread || markedUnread}
+          >
+            <Text style={{ flexGrow: 1 }} as="span" size="T300" truncate>
+              Mark as Unread
+            </Text>
+          </MenuItem>
           <RoomNotificationModeSwitcher roomId={room.roomId} value={notificationMode}>
             {(handleOpen, opened, changing) => (
               <MenuItem
@@ -480,6 +526,17 @@ const RoomNavItemMenu = forwardRef<HTMLDivElement, RoomNavItemMenuProps>(
               {isFavorite ? 'Remove from Favorites' : 'Add to Favorites'}
             </Text>
           </MenuItem>
+          <MenuItem
+            onClick={handleToggleLowPriority}
+            size="300"
+            after={<Icon size="100" src={Icons.ChevronBottom} />}
+            radii="300"
+            aria-pressed={isLowPriority}
+          >
+            <Text style={{ flexGrow: 1 }} as="span" size="T300" truncate>
+              {isLowPriority ? 'Remove from Low Priority' : 'Add to Low Priority'}
+            </Text>
+          </MenuItem>
           <MenuItem
             onClick={handleInvite}
             variant="Primary"
@@ -597,6 +654,10 @@ function RoomNavItem_({
   const [menuAnchor, setMenuAnchor] = useState<RectCords>();
   const [renameDialog, setRenameDialog] = useState(false);
   const unread = useRoomUnread(room.roomId, roomToUnreadAtom);
+  // MSC2867: an explicit "mark as unread" lights the row even with no unread
+  // count. `hasUnread` drives the bold name / icon emphasis below.
+  const markedUnread = useAtomValue(markedUnreadAtom).has(room.roomId);
+  const hasUnread = !!unread || markedUnread;
   const typingMember = useRoomTypingMember(room.roomId).filter(
     (receipt) => receipt.userId !== mx.getUserId(),
   );
@@ -679,7 +740,7 @@ function RoomNavItem_({
     <NavItem
       variant="Background"
       radii="400"
-      highlight={unread !== undefined}
+      highlight={hasUnread}
       aria-selected={selected}
       data-hover={!!menuAnchor}
       onContextMenu={handleContextMenu}
@@ -708,7 +769,7 @@ function RoomNavItem_({
               ) : (
                 <RoomIcon
                   style={{
-                    opacity: unread ? config.opacity.P500 : config.opacity.P300,
+                    opacity: hasUnread ? config.opacity.P500 : config.opacity.P300,
                   }}
                   filled={selected}
                   size="100"
@@ -719,7 +780,7 @@ function RoomNavItem_({
             </Avatar>
             <Box as="span" direction="Column" grow="Yes" style={{ minWidth: 0 }}>
               <Box as="span" grow="Yes" alignItems="Center" gap="100">
-                <Text priority={unread ? '500' : '300'} as="span" size="Inherit" truncate>
+                <Text priority={hasUnread ? '500' : '300'} as="span" size="Inherit" truncate>
                   {roomName}
                 </Text>
                 {hasLocalName && (
@@ -760,7 +821,7 @@ function RoomNavItem_({
                 </Box>
               )}
             </Box>
-            {!optionsVisible && !unread && !selected && typingMember.length > 0 && (
+            {!optionsVisible && !hasUnread && !selected && typingMember.length > 0 && (
               <Badge size="300" variant="Secondary" fill="Soft" radii="Pill" outlined>
                 <TypingIndicator size="300" disableAnimation />
               </Badge>
@@ -770,6 +831,11 @@ function RoomNavItem_({
                 <UnreadBadge highlight={unread.highlight > 0} count={unread.total} />
               </UnreadBadgeCenter>
             )}
+            {!optionsVisible && !unread && markedUnread && (
+              <UnreadBadgeCenter>
+                <UnreadBadge highlight={false} count={0} />
+              </UnreadBadgeCenter>
+            )}
             {!optionsVisible && notificationMode !== RoomNotificationMode.Unset && (
               <Icon
                 size="50"

src/app/features/room-settings/ExportRoomHistory.tsx

@@ -1,5 +1,5 @@
-import React, { useCallback, useState } from 'react';
-import { Box, Button, Icon, IconButton, Icons, Input, Scroll, Spinner, Text } from 'folds';
+import React, { useCallback, useEffect, useRef, useState } from 'react';
+import { Box, Button, Icon, IconButton, Icons, Input, Scroll, Text } from 'folds';
 import { EventType } from 'matrix-js-sdk';
 import { Page, PageContent, PageHeader } from '../../components/page';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
@@ -16,6 +16,12 @@ const FORMAT_LABELS: Record<ExportFormat, string> = {
   html: 'HTML',
 };
 
+const PAGE_LIMIT = 100;
+// Hard cap on back-pagination requests. Without a fromDate, "export all" would
+// otherwise decrypt and hold every message in the room, hammering the server and
+// risking an OOM/freeze with no way to stop. 200 pages × 100 ≈ 20,000 events.
+const MAX_EXPORT_PAGES = 200;
+
 type ExportRoomHistoryProps = {
   requestClose: () => void;
 };
@@ -30,11 +36,28 @@ export function ExportRoomHistory({ requestClose }: ExportRoomHistoryProps) {
   const [toDate, setToDate] = useState('');
   const [exporting, setExporting] = useState(false);
   const [exportCount, setExportCount] = useState(0);
+  const [notice, setNotice] = useState('');
+  const cancelledRef = useRef(false);
+
+  const handleCancel = useCallback(() => {
+    cancelledRef.current = true;
+  }, []);
+
+  // Stop an in-flight export if the panel unmounts (closing settings mid-export
+  // would otherwise keep paginating + decrypting in the background).
+  useEffect(
+    () => () => {
+      cancelledRef.current = true;
+    },
+    [],
+  );
 
   const handleExport = useCallback(async () => {
     if (exporting) return;
+    cancelledRef.current = false;
     setExporting(true);
     setExportCount(0);
+    setNotice('');
 
     try {
       const fromTs = fromDate ? new Date(`${fromDate}T00:00:00`).getTime() : null;
@@ -55,6 +78,14 @@ export function ExportRoomHistory({ requestClose }: ExportRoomHistoryProps) {
       const seen = new Set<string>();
       const timeline = room.getLiveTimeline();
       let canLoadMore = true;
+      // Track the oldest collected timestamp incrementally so the fromTs check
+      // doesn't rescan the whole `collected` array on every pagination step.
+      let oldestTs = Number.POSITIVE_INFINITY;
+      // Oldest RAW message ts paginated (tracked BEFORE the fromTs filter). The
+      // date-range early-break must use this — oldestTs only ever holds collected
+      // events (all >= fromTs), so it can never fall below fromTs and the export
+      // would over-paginate to the page cap and show a misleading "truncated".
+      let oldestRawTs = Number.POSITIVE_INFINITY;
 
       const addEvents = async (events: ReturnType<typeof timeline.getEvents>) => {
         for (const ev of events) {
@@ -70,12 +101,14 @@ export function ExportRoomHistory({ requestClose }: ExportRoomHistoryProps) {
           if (ev.getType() !== EventType.RoomMessage) continue;
           if (ev.isDecryptionFailure()) continue;
           const ts = ev.getTs();
+          if (ts < oldestRawTs) oldestRawTs = ts;
           if (fromTs !== null && ts < fromTs) continue;
           if (toTs !== null && ts > toTs) continue;
           const content = ev.getContent();
           const body: string = content.body ?? '';
           const msgtype: string = content.msgtype ?? '';
           if (!body) continue;
+          if (ts < oldestTs) oldestTs = ts;
           collected.push({
             ts,
             sender: ev.getSender() ?? '',
@@ -89,25 +122,40 @@ export function ExportRoomHistory({ requestClose }: ExportRoomHistoryProps) {
 
       await addEvents(timeline.getEvents());
 
-      // Paginate backwards until start or date range exceeded
+      // Paginate backwards until start, date range exceeded, cap hit, or cancel
+      let pageCount = 0;
+      let truncated = false;
+      let cancelled = false;
       while (canLoadMore) {
-        // If we have a fromTs, check whether the oldest collected event is already
-        // before it — if so we don't need to paginate further.
-        if (fromTs !== null && collected.length > 0) {
-          const oldestTs = Math.min(...collected.map((r) => r.ts));
-          if (oldestTs < fromTs) break;
+        if (cancelledRef.current) {
+          cancelled = true;
+          break;
         }
+        // If we've paginated back past the fromTs boundary, there's nothing more
+        // in range to fetch (use the raw paginated ts, not the collected one).
+        if (fromTs !== null && oldestRawTs < fromTs) break;
+        // Hard cap so "export all" can't run away and OOM the tab.
+        if (pageCount >= MAX_EXPORT_PAGES) {
+          truncated = true;
+          break;
+        }
+        pageCount += 1;
 
         // eslint-disable-next-line no-await-in-loop
         canLoadMore = await mx.paginateEventTimeline(timeline, {
           backwards: true,
-          limit: 100,
+          limit: PAGE_LIMIT,
         });
 
         // eslint-disable-next-line no-await-in-loop
         await addEvents(timeline.getEvents());
       }
 
+      if (cancelled) {
+        setNotice(`Export cancelled after ${collected.length} messages.`);
+        return;
+      }
+
       // Sort chronologically (oldest first)
       collected.sort((a, b) => a.ts - b.ts);
 
@@ -191,6 +239,12 @@ ${msgRows}
       a.download = `export-${safeRoomName}-${dateStr}.${ext}`;
       a.click();
       URL.revokeObjectURL(url);
+
+      if (truncated) {
+        setNotice(
+          `Export truncated to ${collected.length} messages (reached the ${MAX_EXPORT_PAGES}-page limit). Narrow the date range to export older history.`,
+        );
+      }
     } finally {
       setExporting(false);
     }
@@ -297,24 +351,35 @@ ${msgRows}
                         ? `Exporting… ${exportCount} messages`
                         : 'Export will download automatically.'}
                     </Text>
-                    <Button
-                      size="400"
-                      variant="Primary"
-                      fill="Solid"
-                      radii="300"
-                      disabled={exporting}
-                      onClick={handleExport}
-                      before={
-                        exporting ? (
-                          <Spinner size="200" />
-                        ) : (
-                          <Icon src={Icons.Download} size="100" />
-                        )
-                      }
-                    >
-                      <Text size="B400">{exporting ? 'Exporting…' : 'Export'}</Text>
-                    </Button>
+                    {exporting ? (
+                      <Button
+                        size="400"
+                        variant="Critical"
+                        fill="Soft"
+                        radii="300"
+                        onClick={handleCancel}
+                        before={<Icon src={Icons.Cross} size="100" />}
+                      >
+                        <Text size="B400">Cancel</Text>
+                      </Button>
+                    ) : (
+                      <Button
+                        size="400"
+                        variant="Primary"
+                        fill="Solid"
+                        radii="300"
+                        onClick={handleExport}
+                        before={<Icon src={Icons.Download} size="100" />}
+                      >
+                        <Text size="B400">Export</Text>
+                      </Button>
+                    )}
                   </Box>
+                  {notice && (
+                    <Text size="T200" priority="400">
+                      {notice}
+                    </Text>
+                  )}
                 </SequenceCard>
               </Box>
             </Box>

src/app/features/room-settings/PolicyListViewer.tsx

@@ -46,7 +46,9 @@ function isGlob(entity: string): boolean {
 }
 
 function recommendationLabel(rec: string): string {
-  if (rec === 'm.ban') return 'Ban';
+  // `m.ban` is the stable value; `org.matrix.mjolnir.ban` is the legacy
+  // (pre-stabilization) recommendation still emitted by older bots.
+  if (rec === 'm.ban' || rec === 'org.matrix.mjolnir.ban') return 'Ban';
   return rec;
 }
 
@@ -103,9 +105,11 @@ function PolicyEntryRow({ entry }: { entry: PolicyEntry }) {
             <Text size="T200">glob</Text>
           </Badge>
         )}
-        <Badge variant="Critical" fill="Soft" radii="Pill">
-          <Text size="T200">{recommendationLabel(entry.recommendation)}</Text>
-        </Badge>
+        {entry.recommendation && (
+          <Badge variant="Critical" fill="Soft" radii="Pill">
+            <Text size="T200">{recommendationLabel(entry.recommendation)}</Text>
+          </Badge>
+        )}
       </Box>
       {entry.reason && (
         <Text size="T200" priority="300" style={{ wordBreak: 'break-word' }}>

src/app/features/room-settings/RoomActivityLog.tsx

@@ -67,6 +67,7 @@ function describeEvent(mx: ReturnType<typeof useMatrixClient>, ev: MatrixEvent):
       if (membership === 'join') {
         if (
           prevMembership === 'invite' ||
+          prevMembership === 'knock' ||
           prevMembership === undefined ||
           prevMembership === null
         ) {
@@ -115,6 +116,19 @@ function describeEvent(mx: ReturnType<typeof useMatrixClient>, ev: MatrixEvent):
             filter: 'members',
           };
         }
+        // sender !== stateKey and the target was only invited → the inviter (or a
+        // moderator) retracted the invite; this is not a kick.
+        if (prevMembership === 'invite') {
+          return {
+            text: (
+              <>
+                <strong>{senderName}</strong> withdrew the invite to <strong>{targetName}</strong>
+              </>
+            ),
+            iconSrc: Icons.User,
+            filter: 'members',
+          };
+        }
         return {
           text: (
             <>

src/app/features/room-settings/RoomInsights.tsx

@@ -115,10 +115,16 @@ export function RoomInsights({ requestClose }: RoomInsightsProps) {
     const totalMessages = [...msgCounts.values()].reduce((a, b) => a + b, 0);
     const uniqueParticipants = msgCounts.size;
 
-    const msgEvents = events.filter((ev) => ev.getType() === EventType.RoomMessage);
-    const allTs = msgEvents.map((ev) => ev.getTs());
-    const oldestTs = allTs.length > 0 ? Math.min(...allTs) : null;
-    const newestTs = allTs.length > 0 ? Math.max(...allTs) : null;
+    // Single-pass min/max — `Math.min(...allTs)` spreads one arg per message and
+    // overflows the call stack (RangeError) on a large paginated timeline.
+    let oldestTs: number | null = null;
+    let newestTs: number | null = null;
+    for (const ev of events) {
+      if (ev.getType() !== EventType.RoomMessage) continue;
+      const ts = ev.getTs();
+      if (oldestTs === null || ts < oldestTs) oldestTs = ts;
+      if (newestTs === null || ts > newestTs) newestTs = ts;
+    }
 
     return {
       top5,

src/app/features/room-settings/RoomServerACL.tsx

@@ -3,16 +3,22 @@ import {
   Box,
   Button,
   Checkbox,
+  Dialog,
+  Header,
   Icon,
   IconButton,
   Icons,
   Input,
+  Overlay,
+  OverlayBackdrop,
+  OverlayCenter,
   Scroll,
   Spinner,
   Text,
   color,
   config,
 } from 'folds';
+import FocusTrap from 'focus-trap-react';
 import { Page, PageContent, PageHeader } from '../../components/page';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { useRoom } from '../../hooks/useRoom';
@@ -24,6 +30,8 @@ import { useRoomPermissions } from '../../hooks/useRoomPermissions';
 import { AsyncStatus, useAsyncCallback } from '../../hooks/useAsyncCallback';
 import { SequenceCard } from '../../components/sequence-card';
 import { SequenceCardStyle } from '../common-settings/styles.css';
+import { stopPropagation } from '../../utils/keyboard';
+import { useModalStyle } from '../../hooks/useModalStyle';
 
 // ── Types ─────────────────────────────────────────────────────────────────────
 
@@ -42,20 +50,52 @@ const DEFAULT_ACL: ServerAclContent = {
 // ── Validation ────────────────────────────────────────────────────────────────
 
 /**
- * Validate a server name or wildcard pattern.
- * Allowed forms:
- *   - plain hostname / IP:  letters, digits, hyphens, dots
- *   - wildcard prefix:      *.example.com  (asterisk only at the very start)
- * The Matrix spec allows `*` on its own (match-all wildcard).
+ * Validate a server-name glob for an ACL entry.
+ *
+ * Matrix ACL `allow`/`deny` entries are globs where `*` (any run of chars) and
+ * `?` (single char) may appear ANYWHERE — e.g. `*`, `*.example.com`,
+ * `1.2.3.*`, `10.0.0.?`, `*.evil.*`, `*bad*`. We therefore validate the *glob*
+ * rather than a concrete hostname:
+ *   - reject empty / whitespace-only
+ *   - allow only hostname/IP chars plus the wildcards `*` and `?`
+ *     (letters, digits, dots, hyphens, colons for ports/IPv6 — NO underscore)
+ *   - reject consecutive/leading/trailing dots (`...`, `.foo`, `foo.`)
+ *   - reject entries with no alphanumeric or wildcard char (bare `-`, lone `:`)
  */
 function isValidServerPattern(value: string): boolean {
-  if (value === '*') return true;
-  // Strip leading wildcard
-  const rest = value.startsWith('*.') ? value.slice(2) : value;
-  // Must not be empty after stripping wildcard
-  if (!rest) return false;
-  // Remaining part: only letters, digits, dots, hyphens, colons (for IPv6/ports)
-  return /^[A-Za-z0-9.:_-]+$/.test(rest);
+  const v = value.trim();
+  if (!v) return false;
+  // Only hostname/IP glob chars — wildcards may appear at any position.
+  if (!/^[A-Za-z0-9.:*?-]+$/.test(v)) return false;
+  // Structural rules for the dotted parts.
+  if (v.startsWith('.') || v.endsWith('.') || v.includes('..')) return false;
+  // Must carry actual signal — reject pure punctuation like `-`, `:` or `-.-`.
+  if (!/[A-Za-z0-9*?]/.test(v)) return false;
+  return true;
+}
+
+/**
+ * Convert an ACL glob (`*` = any run, `?` = single char) to an anchored RegExp,
+ * escaping every other regex metacharacter. Used only for local self-ban
+ * detection — never sent to the server.
+ */
+function globToRegExp(glob: string): RegExp {
+  const escaped = glob.replace(/[.+^${}()|[\]\\]/g, '\\$&');
+  const pattern = escaped.replace(/\*/g, '.*').replace(/\?/g, '.');
+  // Case-INsensitive: Synapse's glob_to_regex uses IGNORECASE and hostnames are
+  // case-insensitive, so a deny like `MATRIX.foo.org` must still be detected as
+  // self-banning `matrix.foo.org` (otherwise the warning is a false negative).
+  return new RegExp(`^${pattern}$`, 'i');
+}
+
+function matchesAnyGlob(domain: string, globs: string[]): boolean {
+  return globs.some((glob) => {
+    try {
+      return globToRegExp(glob).test(domain);
+    } catch {
+      return false;
+    }
+  });
 }
 
 // ── Server list sub-component ─────────────────────────────────────────────────
@@ -78,7 +118,7 @@ function ServerList({ label, entries, canEdit, onAdd, onRemove }: ServerListProp
     if (!value) return;
 
     if (!isValidServerPattern(value)) {
-      setError('Invalid server pattern. Use a hostname or *.example.com');
+      setError('Invalid pattern. Use a hostname, IP, or glob (e.g. *.evil.com, 1.2.3.*, 10.0.0.?)');
       return;
     }
     setError(undefined);
@@ -181,6 +221,7 @@ type RoomServerACLProps = {
 export function RoomServerACL({ requestClose }: RoomServerACLProps) {
   const mx = useMatrixClient();
   const room = useRoom();
+  const modalStyle = useModalStyle(480);
 
   // Power level checks
   const powerLevels = usePowerLevels(room);
@@ -221,6 +262,26 @@ export function RoomServerACL({ requestClose }: RoomServerACLProps) {
   const saveError =
     saveState.status === AsyncStatus.Error ? 'Failed to save ACL. Please try again.' : undefined;
 
+  // ── Save guards ───────────────────────────────────────────────────────────
+  // #1 Empty allow list denies EVERY server (allow: [] is not "allow all") and
+  // partitions the room from all federation irreversibly — block the save.
+  const emptyAllow = allowList.length === 0;
+
+  // #2 Self-ban: the local homeserver must match at least one allow glob and no
+  // deny glob, otherwise applying this ACL removes our own server from the room.
+  const localDomain = mx.getDomain() ?? '';
+  const selfBanned =
+    localDomain.length > 0 &&
+    (!matchesAnyGlob(localDomain, allowList) || matchesAnyGlob(localDomain, denyList));
+
+  // #4 Gate the destructive write behind a confirmation dialog.
+  const [prompt, setPrompt] = useState(false);
+
+  const handleConfirmSave = () => {
+    setPrompt(false);
+    save();
+  };
+
   // Required power level for this state event
   const requiredPL = readPowerLevel.state(powerLevels, StateEvent.RoomServerAcl);
   const myPL = readPowerLevel.user(powerLevels, myUserId);
@@ -242,8 +303,8 @@ export function RoomServerACL({ requestClose }: RoomServerACLProps) {
                 variant="Primary"
                 fill="Solid"
                 radii="300"
-                disabled={saving || !isDirty}
-                onClick={() => save()}
+                disabled={saving || !isDirty || emptyAllow}
+                onClick={() => setPrompt(true)}
                 before={saving ? <Spinner size="200" /> : <Icon src={Icons.Check} size="100" />}
               >
                 <Text size="B400">{saving ? 'Saving…' : 'Save Changes'}</Text>
@@ -290,6 +351,24 @@ export function RoomServerACL({ requestClose }: RoomServerACLProps) {
                 </Text>
               )}
 
+              {/* #1 Empty allow list guard — blocks save */}
+              {canEdit && emptyAllow && (
+                <Text size="T300" style={{ color: color.Critical.Main }}>
+                  The allow list is empty. An empty allow list denies every server and partitions
+                  this room from all federation permanently. Add at least one entry (use
+                  &quot;*&quot; to allow all servers).
+                </Text>
+              )}
+
+              {/* #2 Self-ban warning — save allowed but confirmation required */}
+              {canEdit && !emptyAllow && selfBanned && (
+                <Text size="T300" style={{ color: color.Warning.Main }}>
+                  Warning: your own homeserver ({localDomain}) is not permitted by this ACL.
+                  Applying it will remove your server from the room and you may lose the ability to
+                  moderate it.
+                </Text>
+              )}
+
               {/* Allow IP literals toggle */}
               <Box direction="Column" gap="100">
                 <Text size="L400">IP Address Access</Text>
@@ -352,6 +431,82 @@ export function RoomServerACL({ requestClose }: RoomServerACLProps) {
           </PageContent>
         </Scroll>
       </Box>
+
+      {/* #4 Confirmation dialog — surfaces the empty-allow (#1) and self-ban (#2)
+          warnings and keeps a safe save one extra click. */}
+      {prompt && (
+        <Overlay open backdrop={<OverlayBackdrop />}>
+          <OverlayCenter>
+            <FocusTrap
+              focusTrapOptions={{
+                initialFocus: false,
+                onDeactivate: () => setPrompt(false),
+                clickOutsideDeactivates: true,
+                escapeDeactivates: stopPropagation,
+              }}
+            >
+              <Dialog
+                variant="Surface"
+                aria-labelledby="server-acl-confirm-title"
+                style={modalStyle}
+              >
+                <Header
+                  style={{
+                    padding: `0 ${config.space.S200} 0 ${config.space.S400}`,
+                    borderBottomWidth: config.borderWidth.B300,
+                  }}
+                  variant="Surface"
+                  size="500"
+                >
+                  <Box grow="Yes">
+                    <Text as="h2" size="H4" id="server-acl-confirm-title">
+                      Apply Server ACL
+                    </Text>
+                  </Box>
+                  <IconButton
+                    size="300"
+                    onClick={() => setPrompt(false)}
+                    radii="300"
+                    aria-label="Cancel"
+                  >
+                    <Icon src={Icons.Cross} />
+                  </IconButton>
+                </Header>
+                <Box style={{ padding: config.space.S400 }} direction="Column" gap="400">
+                  <Box direction="Column" gap="200">
+                    <Text priority="400">
+                      Server ACL changes take effect immediately and control which servers can
+                      participate in this room. This cannot be undone by other servers once they are
+                      removed.
+                    </Text>
+                    {emptyAllow && (
+                      <Text size="T300" style={{ color: color.Critical.Main }}>
+                        The allow list is empty — this would deny every server and partition the
+                        room from all federation permanently.
+                      </Text>
+                    )}
+                    {!emptyAllow && selfBanned && (
+                      <Text size="T300" style={{ color: color.Warning.Main }}>
+                        Warning: your own homeserver ({localDomain}) is not permitted by this ACL.
+                        Applying it will remove your server from the room and you may lose the
+                        ability to moderate it.
+                      </Text>
+                    )}
+                  </Box>
+                  <Button
+                    type="submit"
+                    variant={selfBanned ? 'Critical' : 'Primary'}
+                    onClick={handleConfirmSave}
+                    disabled={emptyAllow}
+                  >
+                    <Text size="B400">Apply ACL</Text>
+                  </Button>
+                </Box>
+              </Dialog>
+            </FocusTrap>
+          </OverlayCenter>
+        </Overlay>
+      )}
     </Page>
   );
 }

src/app/features/room-settings/general/General.tsx

@@ -12,6 +12,7 @@ import {
   RoomPublishedAddresses,
   RoomPublish,
   RoomQuality,
+  RoomRetention,
   RoomShareInvite,
   RoomUpgrade,
   RoomVoiceLimit,
@@ -56,6 +57,10 @@ export function General({ requestClose }: GeneralProps) {
                 <RoomEncryption permissions={permissions} />
                 <RoomPublish permissions={permissions} />
               </Box>
+              <Box direction="Column" gap="100">
+                <Text size="L400">Message Retention</Text>
+                <RoomRetention permissions={permissions} />
+              </Box>
               <Box direction="Column" gap="100">
                 <Text size="L400">Voice</Text>
                 <RoomVoiceLimit permissions={permissions} />

src/app/features/room/MediaGallery.tsx

@@ -133,6 +133,18 @@ function getSenderName(room: Room, userId: string): string {
   return room.getMember(userId)?.name ?? userId.split(':')[0]?.slice(1) ?? userId;
 }
 
+// Resolve the thumbnail/display MXC for an image/video event, mirroring the
+// grid's preference order (encrypted thumb > file > thumbnail_url > url). Both
+// the grid and the lightbox must use this so their positional indices stay in
+// lockstep — otherwise a tile skipped for lack of a thumb would shift the
+// lightbox and open the wrong media.
+function getThumbMxc(mEvent: MatrixEvent): string | undefined {
+  const c = mEvent.getContent();
+  const isEnc = !!c.file;
+  const info: (IImageInfo & IThumbnailContent) | undefined = c.info;
+  return isEnc ? (info?.thumbnail_file?.url ?? c.file?.url) : (info?.thumbnail_url ?? c.url);
+}
+
 // ── Lightbox ──────────────────────────────────────────────────────────────────
 
 type LightboxItem = {
@@ -585,7 +597,10 @@ export function MediaGallery({ room, onClose }: MediaGalleryProps) {
   const lightboxItems: LightboxItem[] = events
     .filter((ev) => {
       const c = ev.getContent();
-      return c.msgtype === MsgType.Image || c.msgtype === MsgType.Video;
+      if (c.msgtype !== MsgType.Image && c.msgtype !== MsgType.Video) return false;
+      // Match the grid's guard exactly: tiles without a thumb are not rendered,
+      // so they must not occupy a lightbox slot either.
+      return !!getThumbMxc(ev);
     })
     .map((ev) => {
       const c = ev.getContent();
@@ -712,9 +727,7 @@ export function MediaGallery({ room, onClose }: MediaGalleryProps) {
                             const info: (IImageInfo & IThumbnailContent) | undefined = c.info;
 
                             // Prefer thumbnail_file (encrypted thumb) > file > thumbnail_url > url
-                            const thumbMxc: string | undefined = isEnc
-                              ? (info?.thumbnail_file?.url ?? c.file?.url)
-                              : (info?.thumbnail_url ?? c.url);
+                            const thumbMxc: string | undefined = getThumbMxc(mEvent);
                             const thumbEnc: IEncryptedFile | undefined = isEnc
                               ? (info?.thumbnail_file ?? c.file)
                               : undefined;

src/app/features/room/RoomInput.tsx

@@ -456,12 +456,16 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
 
             if (compressionResult) {
               const originalFile = fileItem.originalFile as File;
-              const compressedFile = new File([compressionResult.blob], originalFile.name, {
-                type: 'image/jpeg',
+              // compressImage re-encodes as JPEG; swap the extension so the file
+              // name and MIME type agree (avoids e.g. a JPEG named "photo.png").
+              const compressedType = compressionResult.type;
+              const compressedName = `${originalFile.name.replace(/\.[^./\\]+$/, '')}.jpg`;
+              const compressedFile = new File([compressionResult.blob], compressedName, {
+                type: compressedType,
               });
               const uploadRes = await mx.uploadContent(compressedFile, {
-                name: originalFile.name,
-                type: 'image/jpeg',
+                name: compressedName,
+                type: compressedType,
               });
               const compressedMxc = (uploadRes as { content_uri: string }).content_uri;
               if (compressedMxc) {
@@ -538,6 +542,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
         }
         resetEditor(editor);
         resetEditorHistory(editor);
+        setCharCount(0);
         sendTypingStatus(false);
         return;
       }
@@ -579,6 +584,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
       mx.sendMessage(roomId, threadRootId ?? null, content as any);
       resetEditor(editor);
       resetEditorHistory(editor);
+      setCharCount(0);
       localStorage.removeItem(`draft-msg-${draftKey}`);
       setReplyDraft(undefined);
       sendTypingStatus(false);

src/app/features/room/RoomTimeline.tsx

@@ -109,6 +109,8 @@ import { roomIdToActiveThreadIdAtomFamily } from '../../state/room/thread';
 import { ThreadSummary } from './thread/ThreadSummary';
 import { usePowerLevelsContext } from '../../hooks/usePowerLevels';
 import { GetContentCallback, MessageEvent, StateEvent } from '../../../types/matrix/room';
+import { useStateEvent } from '../../hooks/useStateEvent';
+import { RetentionContent, isExpired } from '../../utils/retention';
 import { useKeyDown } from '../../hooks/useKeyDown';
 import { useDocumentFocusChange } from '../../hooks/useDocumentFocusChange';
 import { RenderMessageContent } from '../../components/RenderMessageContent';
@@ -468,6 +470,11 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
   const [encUrlPreview] = useSetting(settingsAtom, 'encUrlPreview');
   const showUrlPreview = room.hasEncryptionStateEvent() ? encUrlPreview : urlPreview;
   const [showHiddenEvents] = useSetting(settingsAtom, 'showHiddenEvents');
+  // MSC1763 retention: messages older than this window are hidden from the
+  // timeline (unless "show hidden events" is on). Reactive so a policy change
+  // re-renders. `undefined` = no policy.
+  const retentionEvent = useStateEvent(room, StateEvent.RoomRetention);
+  const retentionMs = retentionEvent?.getContent<RetentionContent>().max_lifetime;
   const [showDeveloperTools] = useSetting(settingsAtom, 'developerTools');
   const [lotusTerminal] = useSetting(settingsAtom, 'lotusTerminal');
 
@@ -2043,6 +2050,11 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
     if (eventSender && ignoredUsersSet.has(eventSender)) {
       return null;
     }
+    // MSC1763: hide messages past the room's retention window (disappearing
+    // messages). Power users can still inspect via "show hidden events".
+    if (retentionMs && !showHiddenEvents && isExpired(mEvent.getTs(), retentionMs, Date.now())) {
+      return null;
+    }
     if (mEvent.isRedacted() && !showHiddenEvents) {
       // eslint-disable-next-line @typescript-eslint/no-shadow
       const t = mEvent.getType();

src/app/features/room/RoomView.tsx

@@ -19,6 +19,7 @@ import { Page } from '../../components/page';
 import { useSetting } from '../../state/hooks/settings';
 import { settingsAtom } from '../../state/settings';
 import { useTheme, ThemeKind } from '../../hooks/useTheme';
+import { useReducedMotion } from '../../hooks/useReducedMotion';
 import { getChatBg } from '../lotus/chatBackground';
 import { useKeyDown } from '../../hooks/useKeyDown';
 import { editableActiveElement } from '../../utils/dom';
@@ -65,6 +66,7 @@ export function RoomView({ eventId }: { eventId?: string }) {
   const [pauseAnimations] = useSetting(settingsAtom, 'pauseAnimations');
   const theme = useTheme();
   const isDark = theme.kind === ThemeKind.Dark;
+  const reduced = useReducedMotion();
 
   const [hideActivity] = useSetting(settingsAtom, 'hideActivity');
 
@@ -102,10 +104,11 @@ export function RoomView({ eventId }: { eventId?: string }) {
   // Background.Container color. SidebarNav mirrors it onto document.body separately
   // so the glassmorphism sidebar can blur through it.
   const chatBgStyle = useMemo(() => {
-    if (chatBackground !== 'none') return getChatBg(chatBackground, isDark, pauseAnimations);
-    if (lotusTerminal) return getChatBg('tactical', isDark, pauseAnimations);
+    if (chatBackground !== 'none')
+      return getChatBg(chatBackground, isDark, pauseAnimations || reduced);
+    if (lotusTerminal) return getChatBg('tactical', isDark, pauseAnimations || reduced);
     return {};
-  }, [chatBackground, lotusTerminal, isDark, pauseAnimations]);
+  }, [chatBackground, lotusTerminal, isDark, pauseAnimations, reduced]);
 
   return (
     <Page ref={roomViewRef} style={chatBgStyle}>

src/app/features/room/message/forwardContent.ts

@@ -29,6 +29,9 @@ export function buildForwardContent(
   }
 
   delete content['m.relates_to'];
+  // Drop intentional mentions so forwarding a message doesn't re-ping the
+  // originally-mentioned users (they're not in the destination room's context).
+  delete content['m.mentions'];
   if (typeof content.body === 'string') {
     content.body = trimReplyFromBody(content.body);
   }

src/app/features/room/thread/ThreadTimeline.tsx

@@ -460,12 +460,17 @@ export function ThreadTimeline({ room, thread, editor }: ThreadTimelineProps) {
   }, [scrollToBottomCount]);
 
   const handleJumpToBottom = useCallback(() => {
+    // Re-anchor the virtual window at the thread tail first. While scrolled up,
+    // live replies deliberately don't extend the window, so without this the chip
+    // would scroll to the bottom of the STALE window (a mid/old event) instead of
+    // the newest reply. Mirrors the main timeline's handleJumpToLatest.
+    setTimeline(getInitialThreadTimeline(thread, getLinkedTimelines(thread.liveTimeline)));
     scrollToBottomRef.current.count += 1;
     scrollToBottomRef.current.smooth = true;
     // Flip atBottom so the layout effect re-runs (count re-read) and live
     // events resume sticking to the bottom.
     setAtBottom(true);
-  }, []);
+  }, [thread]);
 
   // Scroll in-place editor into view.
   useEffect(() => {

src/app/features/room/thread/threadReceipt.test.ts

@@ -0,0 +1,55 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { ReceiptType } from 'matrix-js-sdk';
+import { markThreadAsRead } from './threadReceipt';
+
+// The regression this guards: sending a receipt for the thread ROOT (when
+// replies aren't loaded, lastReply() is null / equals the root) becomes a MAIN
+// receipt at an old event and drags the room's read marker backwards. It must
+// only ever receipt a genuine loaded reply.
+
+const evt = (id: string, sending = false) => ({ getId: () => id, isSending: () => sending }) as any;
+
+const setup = (lastReply: any) => {
+  const calls: Array<{ eventId: string; type: ReceiptType }> = [];
+  const thread = { id: '$root', lastReply: () => lastReply } as any;
+  const mx = {
+    sendReadReceipt: async (e: any, type: ReceiptType) => {
+      calls.push({ eventId: e.getId(), type });
+      return {};
+    },
+  } as any;
+  return { mx, thread, calls };
+};
+
+test('REGRESSION: no loaded reply (lastReply null) → NO receipt (never the root)', async () => {
+  const { mx, thread, calls } = setup(null);
+  await markThreadAsRead(mx, thread, false);
+  assert.equal(calls.length, 0);
+});
+
+test('REGRESSION: lastReply IS the root → NO receipt', async () => {
+  const { mx, thread, calls } = setup(evt('$root'));
+  await markThreadAsRead(mx, thread, false);
+  assert.equal(calls.length, 0);
+});
+
+test('genuine loaded reply → threaded receipt at that reply', async () => {
+  const { mx, thread, calls } = setup(evt('$reply'));
+  await markThreadAsRead(mx, thread, false);
+  assert.equal(calls.length, 1);
+  assert.equal(calls[0].eventId, '$reply');
+  assert.equal(calls[0].type, ReceiptType.Read);
+});
+
+test('sending reply is skipped', async () => {
+  const { mx, thread, calls } = setup(evt('$reply', true));
+  await markThreadAsRead(mx, thread, false);
+  assert.equal(calls.length, 0);
+});
+
+test('private flag uses ReadPrivate', async () => {
+  const { mx, thread, calls } = setup(evt('$reply'));
+  await markThreadAsRead(mx, thread, true);
+  assert.equal(calls[0].type, ReceiptType.ReadPrivate);
+});

src/app/features/room/thread/threadReceipt.ts

@@ -0,0 +1,28 @@
+import { MatrixClient, ReceiptType, Thread } from 'matrix-js-sdk';
+
+/**
+ * Send a threaded read receipt for a thread, clearing its per-thread unread
+ * count.
+ *
+ * CRITICAL: never receipt the thread ROOT. A thread's liveTimeline is
+ * `[root, reply1, …]`, so the latest event IS the root when replies aren't
+ * loaded yet (common — the thread panel fires this on mount before replies
+ * fetch). The root is "in the main timeline", so a receipt for it is written by
+ * the SDK with `thread_id:"main"` at the old root, dragging the room's MAIN read
+ * marker backwards (`getEventReadUpTo` → an old/unloaded event) and re-lighting
+ * the whole room. We only receipt a genuine loaded reply (`thread.lastReply()`);
+ * if none is loaded we bail (the per-thread count clears when the reply loads
+ * and this runs again). Mirrors the root guard in `utils/notifications.ts`.
+ *
+ * Pure (no React/CSS) so it can be unit-tested — see `threadReceipt.test.ts`.
+ */
+export const markThreadAsRead = async (
+  mx: MatrixClient,
+  thread: Thread,
+  privateReceipt: boolean,
+): Promise<void> => {
+  const lastReply = thread.lastReply();
+  if (!lastReply || lastReply.isSending() || lastReply.getId() === thread.id) return;
+
+  await mx.sendReadReceipt(lastReply, privateReceipt ? ReceiptType.ReadPrivate : ReceiptType.Read);
+};

src/app/features/room/thread/useThread.ts

@@ -4,7 +4,6 @@ import {
   EventTimeline,
   MatrixClient,
   MatrixEvent,
-  ReceiptType,
   Room,
   RoomEvent,
   RoomEventHandlerMap,
@@ -146,32 +145,6 @@ export const useThreadPendingEvents = (
   return pending;
 };
 
-/**
- * Send a threaded read receipt up to the latest confirmed event in the thread.
- *
- * The receipt is threaded by default (scoped to this thread), which clears the
- * per-thread unread count. Mirrors the latest-valid-event scan in
- * `utils/notifications.ts`.
- */
-export const markThreadAsRead = async (
-  mx: MatrixClient,
-  thread: Thread,
-  privateReceipt: boolean,
-): Promise<void> => {
-  const events = thread.liveTimeline.getEvents();
-
-  let latestEvent: MatrixEvent | undefined;
-  for (let i = events.length - 1; i >= 0; i -= 1) {
-    const evt = events[i];
-    if (evt && !evt.isSending()) {
-      latestEvent = evt;
-      break;
-    }
-  }
-  if (!latestEvent) return;
-
-  await mx.sendReadReceipt(
-    latestEvent,
-    privateReceipt ? ReceiptType.ReadPrivate : ReceiptType.Read,
-  );
-};
+// markThreadAsRead moved to ./threadReceipt (pure + unit-tested); re-exported
+// here for existing import sites.
+export { markThreadAsRead } from './threadReceipt';

src/app/features/settings/account/Profile.tsx

@@ -35,6 +35,9 @@ import { SequenceCard } from '../../../components/sequence-card';
 import { SequenceCardStyle } from '../styles.css';
 import { SettingTile } from '../../../components/setting-tile';
 import { useMatrixClient } from '../../../hooks/useMatrixClient';
+import { presenceStateFromSetting } from '../../../hooks/usePresenceUpdater';
+import { useSetting } from '../../../state/hooks/settings';
+import { settingsAtom } from '../../../state/settings';
 import { UserProfile, useUserProfile } from '../../../hooks/useUserProfile';
 import { getMxIdLocalPart, mxcUrlToHttp } from '../../../utils/matrix';
 import { UserAvatar } from '../../../components/user-avatar';
@@ -319,8 +322,8 @@ function ProfileDisplayName({ profile, userId }: ProfileProps) {
   );
 }
 
-const STATUS_EXPIRY_KEY = (id: string) => `lotus-status-expiry-${id}`;
-const STATUS_MSG_KEY = (id: string) => `lotus-status-msg-${id}`;
+export const STATUS_EXPIRY_KEY = (id: string) => `lotus-status-expiry-${id}`;
+export const STATUS_MSG_KEY = (id: string) => `lotus-status-msg-${id}`;
 
 const CLEAR_AFTER_OPTIONS = [
   { label: 'Never', value: '0' },
@@ -347,6 +350,8 @@ function ProfileStatus() {
   const mx = useMatrixClient();
   const userId = mx.getUserId()!;
   const presence = useUserPresence(userId);
+  const [presenceStatus] = useSetting(settingsAtom, 'presenceStatus');
+  const [hidePresence] = useSetting(settingsAtom, 'hidePresence');
 
   const [statusMsg, setStatusMsg] = useState<string>(
     presence?.status ?? localStorage.getItem(STATUS_MSG_KEY(userId)) ?? '',
@@ -357,12 +362,6 @@ function ProfileStatus() {
   const [clearAfter, setClearAfter] = useState('0');
   const [emojiAnchor, setEmojiAnchor] = useState<RectCords>();
 
-  // Initialise expiry from localStorage so timer survives page reload
-  const [expiryTs, setExpiryTs] = useState<number>(() => {
-    const stored = localStorage.getItem(STATUS_EXPIRY_KEY(userId));
-    return stored ? parseInt(stored, 10) : 0;
-  });
-
   // Sync input when another device changes the status.
   // Skipped while the user has unsaved local edits to avoid clobbering
   // mid-flight input (e.g. an emoji being inserted).
@@ -373,32 +372,16 @@ function ProfileStatus() {
     }
   }, [presence?.status, userId]);
 
-  // Drive the auto-clear timer off expiryTs so re-saving cancels the old timer
-  useEffect(() => {
-    if (!expiryTs) return undefined;
-    const remaining = expiryTs - Date.now();
-    const clearStatus = () => {
-      localStorage.removeItem(STATUS_MSG_KEY(userId));
-      localStorage.removeItem(STATUS_EXPIRY_KEY(userId));
-      setExpiryTs(0);
-      mx.setPresence({ presence: 'online', status_msg: '' }).catch(() => undefined);
-    };
-    if (remaining <= 0) {
-      clearStatus();
-      return undefined;
-    }
-    const timer = window.setTimeout(clearStatus, remaining);
-    return () => clearTimeout(timer);
-  }, [expiryTs, userId, mx]);
-
   const [saveState, saveStatus] = useAsyncCallback(
     useCallback(
       (msg: string) =>
         mx.setPresence({
-          presence: 'online',
+          // Derive presence from the user's chosen setting so writing a status
+          // never overrides Invisible/DND/Idle (e.g. outing an Invisible user).
+          presence: presenceStateFromSetting(presenceStatus, hidePresence),
           status_msg: msg,
         }),
-      [mx],
+      [mx, presenceStatus, hidePresence],
     ),
   );
   const saving = saveState.status === AsyncStatus.Loading;
@@ -429,12 +412,12 @@ function ProfileStatus() {
 
     const delayMs = getMsFromOption(clearAfter);
     if (msg && delayMs > 0) {
+      // Persist the expiry timestamp; the always-mounted StatusExpiryMonitor
+      // (ClientNonUIFeatures) fires the auto-clear even when Settings is closed.
       const ts = Date.now() + delayMs;
       localStorage.setItem(STATUS_EXPIRY_KEY(userId), String(ts));
-      setExpiryTs(ts);
     } else {
       localStorage.removeItem(STATUS_EXPIRY_KEY(userId));
-      setExpiryTs(0);
     }
   };
 
@@ -443,8 +426,11 @@ function ProfileStatus() {
     setStatusMsg('');
     localStorage.removeItem(STATUS_MSG_KEY(userId));
     localStorage.removeItem(STATUS_EXPIRY_KEY(userId));
-    setExpiryTs(0);
-    mx.setPresence({ presence: 'online', status_msg: '' }).catch(() => undefined);
+    // Preserve the user's chosen presence when clearing the status message.
+    mx.setPresence({
+      presence: presenceStateFromSetting(presenceStatus, hidePresence),
+      status_msg: '',
+    }).catch(() => undefined);
   };
 
   const hasChanges = statusMsg !== (presence?.status ?? '');
@@ -751,10 +737,22 @@ function ProfileTimezone() {
   const [saveState, saveTimezone] = useAsyncCallback(
     useCallback(
       (value: string) =>
-        (mx as any).setAccountData('im.lotus.timezone', { timezone: value }).then(() => {
+        Promise.all([
+          // Self-fallback: account data is readable by useExtendedProfile for the
+          // own user even on servers without extended-profile (m.tz) support.
+          (mx as any).setAccountData('im.lotus.timezone', { timezone: value }),
+          // Mirror the pronouns write path so OTHER users can read the timezone
+          // via the m.tz profile field. Best-effort: standard Synapse rejects
+          // unknown profile fields, so a failure here must not fail the save.
+          mx.http
+            .authedRequest(Method.Put, `/profile/${encodeURIComponent(userId)}/m.tz`, undefined, {
+              'm.tz': value,
+            })
+            .catch(() => undefined),
+        ]).then(() => {
           setSavedTimezone(value);
         }),
-      [mx],
+      [mx, userId],
     ),
   );
   const saving = saveState.status === AsyncStatus.Loading;

src/app/features/settings/account/ProfileDecoration.tsx

@@ -50,7 +50,7 @@ function DecorationPreviewCell({
       <img
         src={`${DECORATION_CDN}/${slug}.png`}
         alt={name}
-        loading="eager"
+        loading="lazy"
         decoding="async"
         style={{
           position: 'absolute',

src/app/features/settings/general/General.tsx

@@ -105,6 +105,7 @@ import { useTauriUpdater } from '../../../hooks/useTauriUpdater';
 import { isTauri as isTauriEnv, invokeTauri, tauriInvoke } from '../../../hooks/useTauri';
 import { customWindowChromeAtom } from '../../../state/customWindowChrome';
 import { useDateFormatItems } from '../../../hooks/useDateFormat';
+import { useReducedMotion } from '../../../hooks/useReducedMotion';
 import { playCallJoinSound } from '../../../utils/callSounds';
 import { previewRingtone, RINGTONE_OPTIONS } from '../../../utils/ringtones';
 import { DenoiseTester } from './DenoiseTester';
@@ -118,12 +119,21 @@ import { SettingsSelect } from '../../../components/settings-select/SettingsSele
 function DesktopChromeSetting() {
   const [customChrome, setCustomChrome] = useAtom(customWindowChromeAtom);
   if (!isTauriEnv()) return null;
+  // Persist the flag, then reload so the window layout is rebuilt from scratch.
+  // Toggling live reflows the whole app while the room timeline is mounted, which
+  // resizes its virtualized scroll container and triggers runaway back-pagination
+  // (the "screen expands + auto-scrolls into the past" bug). A reload applies the
+  // chrome cleanly against a fresh, correct layout.
+  const handleToggle = (value: boolean) => {
+    setCustomChrome(value);
+    window.location.reload();
+  };
   return (
     <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
       <SettingTile
         title="Custom Window Chrome (Beta)"
-        description="Replace the system title bar with a Lotus-styled one. Desktop only — toggles instantly."
-        after={<Switch variant="Primary" value={customChrome} onChange={setCustomChrome} />}
+        description="Replace the system title bar with a Lotus-styled one. Desktop only — reloads to apply."
+        after={<Switch variant="Primary" value={customChrome} onChange={handleToggle} />}
       />
     </SequenceCard>
   );
@@ -2045,6 +2055,7 @@ function ChatBgGrid() {
   const [pauseAnimations] = useSetting(settingsAtom, 'pauseAnimations');
   const theme = useTheme();
   const isDark = theme.kind === ThemeKind.Dark;
+  const reduced = useReducedMotion();
 
   return (
     <Box
@@ -2070,7 +2081,7 @@ function ChatBgGrid() {
             style={{
               width: toRem(76),
               height: toRem(50),
-              ...getChatBg(opt.value as ChatBackground, isDark, pauseAnimations),
+              ...getChatBg(opt.value as ChatBackground, isDark, pauseAnimations || reduced),
             }}
           />
           <Text
@@ -2240,6 +2251,10 @@ function Messages() {
   const [urlPreview, setUrlPreview] = useSetting(settingsAtom, 'urlPreview');
   const [encUrlPreview, setEncUrlPreview] = useSetting(settingsAtom, 'encUrlPreview');
   const [showHiddenEvents, setShowHiddenEvents] = useSetting(settingsAtom, 'showHiddenEvents');
+  const [enforceRetentionLocally, setEnforceRetentionLocally] = useSetting(
+    settingsAtom,
+    'enforceRetentionLocally',
+  );
 
   return (
     <Box direction="Column" gap="100">
@@ -2337,6 +2352,19 @@ function Messages() {
           }
         />
       </SequenceCard>
+      <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
+        <SettingTile
+          title="Enforce Message Retention"
+          description="Permanently delete your own messages once a room's retention window (Room Settings → Message Retention) has passed. Off by default; only affects your own messages."
+          after={
+            <Switch
+              variant="Primary"
+              value={enforceRetentionLocally}
+              onChange={setEnforceRetentionLocally}
+            />
+          }
+        />
+      </SequenceCard>
     </Box>
   );
 }

src/app/features/settings/notifications/Notifications.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
 import { useAtomValue, useSetAtom } from 'jotai';
-import { Box, Button, Text, IconButton, Icon, Icons, Scroll, config, toRem } from 'folds';
+import { Box, Button, Text, IconButton, Icon, Icons, IconSrc, Scroll, config, toRem } from 'folds';
 import { Page, PageContent, PageHeader } from '../../../components/page';
 import { SystemNotification } from './SystemNotification';
 import { AllMessagesNotifications } from './AllMessages';
@@ -14,13 +14,13 @@ import { settingsAtom, Settings } from '../../../state/settings';
 
 const PRESETS: Array<{
   label: string;
-  emoji: string;
+  icon: IconSrc;
   description: string;
   patch: Partial<Settings>;
 }> = [
   {
     label: 'Gaming',
-    emoji: '🎮',
+    icon: Icons.Ball,
     description: 'Notifications on, sounds off',
     patch: {
       showNotifications: true,
@@ -32,7 +32,7 @@ const PRESETS: Array<{
   },
   {
     label: 'Work',
-    emoji: '💼',
+    icon: Icons.Monitor,
     description: 'All notifications and sounds on',
     patch: {
       showNotifications: true,
@@ -44,7 +44,7 @@ const PRESETS: Array<{
   },
   {
     label: 'Sleep',
-    emoji: '🌙',
+    icon: Icons.BellMute,
     description: 'All notifications off',
     patch: {
       showNotifications: false,
@@ -83,7 +83,7 @@ function NotificationPresets() {
               }}
             >
               <Box direction="Column" alignItems="Center" gap="100">
-                <span style={{ fontSize: toRem(24) }}>{preset.emoji}</span>
+                <Icon size="400" src={preset.icon} />
                 <Text size="T300" style={{ fontWeight: config.fontWeight.W600 }}>
                   {preset.label}
                 </Text>

src/app/hooks/useAfkAutoMute.ts

@@ -4,84 +4,86 @@ import { CallEmbed, useCallControlState } from '../plugins/call';
 import { useSetting } from '../state/hooks/settings';
 import { settingsAtom } from '../state/settings';
 import { toastQueueAtom } from '../state/toast';
+import { useMatrixClient } from './useMatrixClient';
 
-const SILENCE_RMS_THRESHOLD = 0.008;
 const CHECK_INTERVAL_MS = 500;
 
 /**
- * Monitors microphone audio while in a call. If the mic stays unmuted but
- * silent for longer than the configured timeout, the mic is muted and a toast
- * is shown.
+ * Monitors microphone activity while in a call. If the mic stays unmuted but
+ * the user is not speaking for longer than the configured timeout, the mic is
+ * muted and a toast is shown.
  *
- * The level-monitoring capture (`getUserMedia`) is opened ONLY while the mic is
- * unmuted — there is nothing to auto-mute once you are already muted, so
- * holding the capture would keep the OS recording indicator lit even though the
- * UI shows you as muted (N95). Muting therefore releases our stream; unmuting
- * re-acquires it. The AudioContext + stream are also torn down on unmount.
+ * [C-H2] Activity is read from the EC fork's `io.lotus.call_state` stream
+ * (getLotusParticipants) — i.e. the VAD state of the user's ACTUAL published
+ * track on their SELECTED input device. The previous implementation opened its
+ * own `getUserMedia({ audio: true })`, which captured the browser DEFAULT mic
+ * (not necessarily the device EC publishes from): it could measure silence
+ * while the user spoke on a different device (auto-muting an active speaker) and
+ * lit a second OS microphone indicator. Sourcing from the fork removes both
+ * problems and needs no extra capture.
+ *
+ * If the fork hasn't reported call-state yet (getLotusParticipants() === null —
+ * e.g. plain EC, or immediately after join), we cannot tell whether the user is
+ * publishing, so we fail SAFE and never auto-mute during that window.
  */
 export function useAfkAutoMute(callEmbed: CallEmbed | undefined): void {
+  const mx = useMatrixClient();
   const [enabled] = useSetting(settingsAtom, 'afkAutoMute');
   const [timeoutMinutes] = useSetting(settingsAtom, 'afkTimeoutMinutes');
   const setToast = useSetAtom(toastQueueAtom);
   const { microphone } = useCallControlState(callEmbed?.control);
 
   useEffect(() => {
-    // Only capture while in a call, enabled, AND unmuted (see N95 note above).
+    // Only monitor while in a call, enabled, AND unmuted — there is nothing to
+    // auto-mute once you are already muted.
     if (!callEmbed || !enabled || !microphone) return undefined;
 
-    let stream: MediaStream | undefined;
-    let audioCtx: AudioContext | undefined;
-    let intervalId: ReturnType<typeof setInterval> | undefined;
+    const localUserId = mx.getSafeUserId();
+    const timeoutMs = timeoutMinutes * 60 * 1000;
     let silenceStart: number | null = null;
     let active = true;
-    const timeoutMs = timeoutMinutes * 60 * 1000;
 
-    navigator.mediaDevices
-      .getUserMedia({ audio: true, video: false })
-      .then((s) => {
-        if (!active) {
-          s.getTracks().forEach((t) => t.stop());
-          return;
-        }
-        stream = s;
-        audioCtx = new AudioContext();
-        const source = audioCtx.createMediaStreamSource(stream);
-        const analyser = audioCtx.createAnalyser();
-        analyser.fftSize = 256;
-        source.connect(analyser);
-        const buffer = new Float32Array(analyser.fftSize);
+    // undefined = fork hasn't reported call-state yet (can't tell — fail safe).
+    const isLocalSpeaking = (): boolean | undefined => {
+      const participants = callEmbed.getLotusParticipants();
+      // null = fork not reported; [] = malformed/spurious payload (CallEmbed
+      // stores [] for a non-array). You are ALWAYS present in your own joined
+      // call, so an empty list means "no usable data", NOT "silent" — matching
+      // useCallSpeakers / useRemoteAllMuted. Treating [] as silent would let the
+      // timer mute an active speaker. Fail safe on both.
+      if (participants === null || participants.length === 0) return undefined;
+      return participants.some((p) => p.userId === localUserId && p.audioEnabled && p.speaking);
+    };
 
-        intervalId = setInterval(() => {
-          if (!active) return;
-          analyser.getFloatTimeDomainData(buffer);
-          const rms = Math.sqrt(buffer.reduce((sum, v) => sum + v * v, 0) / buffer.length);
+    const intervalId = setInterval(() => {
+      if (!active) return;
+      const speaking = isLocalSpeaking();
 
-          if (rms > SILENCE_RMS_THRESHOLD) {
-            // Audio detected — reset the silence timer.
-            silenceStart = null;
-          } else if (silenceStart === null) {
-            // Mic is unmuted (effect only runs while unmuted) but silent — start the timer.
-            silenceStart = Date.now();
-          } else if (Date.now() - silenceStart >= timeoutMs) {
-            callEmbed.control.setMicrophone(false);
-            setToast({
-              id: `afk-mute-${Date.now()}`,
-              displayName: 'Lotus Chat',
-              body: 'Your microphone was muted after inactivity.',
-              roomName: 'Voice call',
-              roomId: callEmbed.roomId,
-            });
-            silenceStart = null;
-          }
-        }, CHECK_INTERVAL_MS);
-      })
-      .catch(() => undefined);
+      if (speaking === undefined) {
+        // No usable signal — don't risk muting an active speaker.
+        silenceStart = null;
+      } else if (speaking) {
+        // Voice detected on the published track — reset the silence timer.
+        silenceStart = null;
+      } else if (silenceStart === null) {
+        // Mic is unmuted (effect only runs while unmuted) but silent — start the timer.
+        silenceStart = Date.now();
+      } else if (Date.now() - silenceStart >= timeoutMs) {
+        callEmbed.control.setMicrophone(false);
+        setToast({
+          id: `afk-mute-${Date.now()}`,
+          displayName: 'Lotus Chat',
+          body: 'Your microphone was muted after inactivity.',
+          roomName: 'Voice call',
+          roomId: callEmbed.roomId,
+        });
+        silenceStart = null;
+      }
+    }, CHECK_INTERVAL_MS);
 
     return () => {
       active = false;
-      if (intervalId !== undefined) clearInterval(intervalId);
-      stream?.getTracks().forEach((t) => t.stop());
-      audioCtx?.close().catch(() => undefined);
+      clearInterval(intervalId);
     };
-  }, [callEmbed, enabled, timeoutMinutes, setToast, microphone]);
+  }, [callEmbed, enabled, timeoutMinutes, setToast, microphone, mx]);
 }

src/app/hooks/useAvatarDecoration.ts

@@ -9,6 +9,9 @@ const PROFILE_FIELD = 'io.lotus.avatar_decoration';
 const cache = new Map<string, string | null>();
 // Callbacks waiting for a userId's result
 const pending = new Map<string, Array<(val: string | null) => void>>();
+// Transient-failure attempt counts (userId → n) so a flaky federated lookup
+// can retry a couple of times, then gives up for the session.
+const failures = new Map<string, number>();
 
 function fetchDecoration(
   authedRequest: (method: Method, path: string) => Promise<Record<string, string>>,
@@ -33,16 +36,23 @@ function fetchDecoration(
       return val;
     })
     .catch((err: unknown) => {
-      // A 404 (M_NOT_FOUND) means the field is genuinely unset → cache "no
-      // decoration". A transient failure (429 rate-limit, 5xx, network) must
-      // NOT be cached: doing so permanently hides the user's decoration for the
-      // whole session. This matters most for the member list and timeline, which
-      // mount many avatars at once and can trip homeserver rate limits — a
-      // single 429 in that burst would otherwise wipe the decoration until a
-      // full reload. Leaving the cache unset lets the next mount retry.
       const status = err instanceof MatrixError ? err.httpStatus : undefined;
-      if (status === 404) {
+      // Definitive rejections — the field is unset (404) or the server won't
+      // serve it (400/403). This is the common case for FEDERATED users whose
+      // homeserver doesn't support extended profiles / rejects the field. Cache
+      // "no decoration" so we never refetch: otherwise every avatar mount
+      // re-requests and floods our homeserver with failing federated profile
+      // lookups (the 403/502 console storm + real HS load).
+      if (status === 404 || status === 403 || status === 400) {
         cache.set(userId, null);
+      } else {
+        // Transient (429 rate-limit / 5xx / network). Allow a couple of retries
+        // — a single 429 in a member-list burst shouldn't permanently hide a
+        // decoration — then give up for the session so a persistently-failing
+        // federated link (e.g. a 502'ing remote server) can't loop forever.
+        const attempts = (failures.get(userId) ?? 0) + 1;
+        failures.set(userId, attempts);
+        if (attempts >= 2) cache.set(userId, null);
       }
       return null;
     })

src/app/hooks/useBookmarks.ts

@@ -1,7 +1,6 @@
 import { useCallback, useEffect, useState } from 'react';
-import { MatrixClient } from 'matrix-js-sdk';
+import { ClientEvent, ClientEventHandlerMap, MatrixClient } from 'matrix-js-sdk';
 import { useMatrixClient } from './useMatrixClient';
-import { useAccountDataCallback } from './useAccountDataCallback';
 
 export type Bookmark = {
   roomId: string;
@@ -25,6 +24,75 @@ function readBookmarks(mx: MatrixClient): Bookmark[] {
   );
 }
 
+// Module-scoped serialization state.
+//
+// useBookmarks() is mounted once per message row (dozens of live instances), so
+// a per-instance latest/queue would only serialize writes within a single row —
+// bookmarking message A then message B from different rows (before the server
+// echo lands) would let B compute from a stale snapshot and clobber A
+// (setAccountData replaces the whole content, no server merge). We therefore
+// keep a single shared latest ref + write queue, keyed off the active client.
+type BookmarksModuleState = {
+  mx: MatrixClient;
+  latest: Bookmark[];
+  writeQueue: Promise<unknown>;
+  listeners: Set<(list: Bookmark[]) => void>;
+  onAccountData: ClientEventHandlerMap[ClientEvent.AccountData];
+};
+
+let moduleState: BookmarksModuleState | null = null;
+
+// Lazily initialize the shared state for the given client. On a client change
+// (login/logout swaps the MatrixClient) we tear down the old subscription and
+// re-initialize against the new client so we never leak or double-subscribe.
+function ensureModuleState(mx: MatrixClient): BookmarksModuleState {
+  if (moduleState && moduleState.mx === mx) {
+    return moduleState;
+  }
+
+  if (moduleState) {
+    moduleState.mx.removeListener(ClientEvent.AccountData, moduleState.onAccountData);
+  }
+
+  const state: BookmarksModuleState = {
+    mx,
+    latest: readBookmarks(mx),
+    writeQueue: Promise.resolve(),
+    listeners: new Set(),
+    // Reassigned below once `state` is captured.
+    onAccountData: () => undefined,
+  };
+
+  state.onAccountData = (evt) => {
+    if (evt.getType() === BOOKMARKS_KEY) {
+      const list = evt.getContent<BookmarksContent>()?.bookmarks ?? [];
+      state.latest = list;
+      state.listeners.forEach((listener) => listener(list));
+    }
+  };
+
+  mx.on(ClientEvent.AccountData, state.onAccountData);
+  moduleState = state;
+  return state;
+}
+
+function enqueueBookmarkWrite(
+  mx: MatrixClient,
+  compute: (current: Bookmark[]) => Bookmark[],
+): Promise<void> {
+  const state = ensureModuleState(mx);
+  const run = state.writeQueue.then(async () => {
+    const next = compute(state.latest);
+    state.latest = next;
+    state.listeners.forEach((listener) => listener(next));
+    await (mx as any).setAccountData(BOOKMARKS_KEY, { bookmarks: next });
+  });
+  // Keep the chain alive even if one write rejects, but propagate the
+  // rejection to this caller so it can react (e.g. retry).
+  state.writeQueue = run.catch(() => undefined);
+  return run;
+}
+
 export function useBookmarks(): {
   bookmarks: Bookmark[];
   addBookmark: (b: Bookmark) => Promise<void>;
@@ -32,45 +100,37 @@ export function useBookmarks(): {
   isBookmarked: (eventId: string) => boolean;
 } {
   const mx = useMatrixClient();
-  const [bookmarks, setBookmarks] = useState<Bookmark[]>(() => readBookmarks(mx));
+  const [bookmarks, setBookmarks] = useState<Bookmark[]>(() => ensureModuleState(mx).latest);
 
-  useAccountDataCallback(
-    mx,
-    useCallback(
-      (evt) => {
-        if (evt.getType() === BOOKMARKS_KEY) {
-          setBookmarks(evt.getContent<BookmarksContent>()?.bookmarks ?? []);
-        }
-      },
-      [setBookmarks],
-    ),
-  );
-
-  // Re-read on mx change
+  // Subscribe to the shared module state. A single AccountData listener is
+  // installed per client (in ensureModuleState); each hook instance only
+  // registers a local setter and unregisters it on unmount / client change.
   useEffect(() => {
-    setBookmarks(readBookmarks(mx));
+    const state = ensureModuleState(mx);
+    setBookmarks(state.latest);
+    state.listeners.add(setBookmarks);
+    return () => {
+      state.listeners.delete(setBookmarks);
+    };
   }, [mx]);
 
   const addBookmark = useCallback(
-    async (b: Bookmark) => {
-      const current = readBookmarks(mx);
-      // Avoid duplicates
-      const filtered = current.filter((bk) => bk.eventId !== b.eventId);
-      let next = [b, ...filtered];
-      if (next.length > MAX_BOOKMARKS) {
-        next = next.slice(0, MAX_BOOKMARKS);
-      }
-      await (mx as any).setAccountData(BOOKMARKS_KEY, { bookmarks: next });
-    },
+    (b: Bookmark) =>
+      enqueueBookmarkWrite(mx, (current) => {
+        // Avoid duplicates
+        const filtered = current.filter((bk) => bk.eventId !== b.eventId);
+        let next = [b, ...filtered];
+        if (next.length > MAX_BOOKMARKS) {
+          next = next.slice(0, MAX_BOOKMARKS);
+        }
+        return next;
+      }),
     [mx],
   );
 
   const removeBookmark = useCallback(
-    async (eventId: string) => {
-      const current = readBookmarks(mx);
-      const next = current.filter((bk) => bk.eventId !== eventId);
-      await (mx as any).setAccountData(BOOKMARKS_KEY, { bookmarks: next });
-    },
+    (eventId: string) =>
+      enqueueBookmarkWrite(mx, (current) => current.filter((bk) => bk.eventId !== eventId)),
     [mx],
   );
 

src/app/hooks/usePresenceUpdater.ts

@@ -6,6 +6,25 @@ import { settingsAtom } from '../state/settings';
 const IDLE_TIMEOUT_MS = 10 * 60 * 1000;
 const ACTIVITY_THROTTLE_MS = 1000;
 
+export type PresenceSetting = 'auto' | 'online' | 'idle' | 'dnd' | 'invisible';
+export type PresenceState = 'online' | 'unavailable' | 'offline';
+
+/**
+ * Single source of truth for mapping the user's presence preference to the
+ * Matrix presence value: auto/online → 'online', idle/dnd → 'unavailable',
+ * invisible (or the hidePresence override) → 'offline'. Shared with the Profile
+ * status writer so setting/clearing a status message never overrides the user's
+ * chosen presence (e.g. outing an Invisible user as online).
+ */
+export function presenceStateFromSetting(
+  presenceStatus: PresenceSetting,
+  hidePresence: boolean,
+): PresenceState {
+  if (hidePresence || presenceStatus === 'invisible') return 'offline';
+  if (presenceStatus === 'idle' || presenceStatus === 'dnd') return 'unavailable';
+  return 'online';
+}
+
 export function usePresenceUpdater() {
   const mx = useMatrixClient();
   const [hidePresence] = useSetting(settingsAtom, 'hidePresence');

src/app/hooks/useReducedMotion.ts

@@ -0,0 +1,34 @@
+import { useEffect, useState } from 'react';
+
+const REDUCED_MOTION_QUERY = '(prefers-reduced-motion: reduce)';
+
+const readReducedMotion = (): boolean =>
+  typeof window !== 'undefined' &&
+  typeof window.matchMedia === 'function' &&
+  window.matchMedia(REDUCED_MOTION_QUERY).matches;
+
+/**
+ * Reactively tracks the OS `prefers-reduced-motion: reduce` setting.
+ *
+ * Unlike a one-off `window.matchMedia(...).matches` read, this subscribes to the
+ * media query's `change` event, so toggling the OS setting mid-session updates
+ * the returned value (and any animation gated on it) without a page reload.
+ * SSR/undefined-safe: returns `false` when `window`/`matchMedia` is unavailable.
+ */
+export function useReducedMotion(): boolean {
+  const [reduced, setReduced] = useState<boolean>(readReducedMotion);
+
+  useEffect(() => {
+    if (typeof window === 'undefined' || typeof window.matchMedia !== 'function') {
+      return undefined;
+    }
+    const mql = window.matchMedia(REDUCED_MOTION_QUERY);
+    const onChange = (event: MediaQueryListEvent) => setReduced(event.matches);
+    // Re-sync in case the setting changed between the initial render and this effect.
+    setReduced(mql.matches);
+    mql.addEventListener('change', onChange);
+    return () => mql.removeEventListener('change', onChange);
+  }, []);
+
+  return reduced;
+}

src/app/hooks/useReminders.ts

@@ -1,7 +1,6 @@
-import { useCallback, useEffect, useRef, useState } from 'react';
-import { MatrixClient } from 'matrix-js-sdk';
+import { useCallback, useEffect, useState } from 'react';
+import { ClientEvent, ClientEventHandlerMap, MatrixClient } from 'matrix-js-sdk';
 import { useMatrixClient } from './useMatrixClient';
-import { useAccountDataCallback } from './useAccountDataCallback';
 
 export type Reminder = {
   roomId: string;
@@ -23,6 +22,75 @@ function readReminders(mx: MatrixClient): Reminder[] {
   );
 }
 
+// Module-scoped serialization state.
+//
+// The latest snapshot and the write queue must be shared across every hook
+// instance: ReminderMonitor (auto-removes fired reminders) and RemindMeDialog
+// (adds reminders) mount separate hooks, and a per-instance queue would let a
+// remove and an add race across instances and clobber each other (setAccountData
+// replaces the whole content, no server merge). We therefore keep a single
+// shared queue + latest ref, keyed off the active MatrixClient.
+type ReminderModuleState = {
+  mx: MatrixClient;
+  latest: Reminder[];
+  writeQueue: Promise<unknown>;
+  listeners: Set<(list: Reminder[]) => void>;
+  onAccountData: ClientEventHandlerMap[ClientEvent.AccountData];
+};
+
+let moduleState: ReminderModuleState | null = null;
+
+// Lazily initialize the shared state for the given client. On a client change
+// (login/logout swaps the MatrixClient) we tear down the old subscription and
+// re-initialize against the new client so we never leak or double-subscribe.
+function ensureModuleState(mx: MatrixClient): ReminderModuleState {
+  if (moduleState && moduleState.mx === mx) {
+    return moduleState;
+  }
+
+  if (moduleState) {
+    moduleState.mx.removeListener(ClientEvent.AccountData, moduleState.onAccountData);
+  }
+
+  const state: ReminderModuleState = {
+    mx,
+    latest: readReminders(mx),
+    writeQueue: Promise.resolve(),
+    listeners: new Set(),
+    // Reassigned below once `state` is captured.
+    onAccountData: () => undefined,
+  };
+
+  state.onAccountData = (evt) => {
+    if (evt.getType() === REMINDERS_KEY) {
+      const list = evt.getContent<RemindersContent>()?.reminders ?? [];
+      state.latest = list;
+      state.listeners.forEach((listener) => listener(list));
+    }
+  };
+
+  mx.on(ClientEvent.AccountData, state.onAccountData);
+  moduleState = state;
+  return state;
+}
+
+function enqueueReminderWrite(
+  mx: MatrixClient,
+  compute: (current: Reminder[]) => Reminder[],
+): Promise<void> {
+  const state = ensureModuleState(mx);
+  const run = state.writeQueue.then(async () => {
+    const next = compute(state.latest);
+    state.latest = next;
+    state.listeners.forEach((listener) => listener(next));
+    await (mx as any).setAccountData(REMINDERS_KEY, { reminders: next });
+  });
+  // Keep the chain alive even if one write rejects, but propagate the
+  // rejection to this caller so it can react (e.g. retry).
+  state.writeQueue = run.catch(() => undefined);
+  return run;
+}
+
 export function useReminders(): {
   reminders: Reminder[];
   addReminder: (r: Reminder) => Promise<void>;
@@ -30,69 +98,34 @@ export function useReminders(): {
   getReminders: () => Reminder[];
 } {
   const mx = useMatrixClient();
-  const [reminders, setReminders] = useState<Reminder[]>(() => readReminders(mx));
+  const [reminders, setReminders] = useState<Reminder[]>(() => ensureModuleState(mx).latest);
 
-  // Authoritative local snapshot used to compute mutations. Reading
-  // mx.getAccountData() per-mutation is racy: two quick add/remove calls both
-  // read the same stale baseline and the second write clobbers the first
-  // (N113). We instead mutate from this ref, kept in sync with server echoes.
-  const latestRef = useRef<Reminder[]>(reminders);
-  // Serialize writes so overlapping setAccountData calls can't land out of
-  // order on the server (last-write-wins would otherwise drop data).
-  const writeQueueRef = useRef<Promise<unknown>>(Promise.resolve());
-
-  const applyServerState = useCallback((list: Reminder[]) => {
-    latestRef.current = list;
-    setReminders(list);
-  }, []);
-
-  useAccountDataCallback(
-    mx,
-    useCallback(
-      (evt) => {
-        if (evt.getType() === REMINDERS_KEY) {
-          applyServerState(evt.getContent<RemindersContent>()?.reminders ?? []);
-        }
-      },
-      [applyServerState],
-    ),
-  );
-
-  // Re-read on mx change
+  // Subscribe to the shared module state. A single AccountData listener is
+  // installed per client (in ensureModuleState); each hook instance only
+  // registers a local setter and unregisters it on unmount / client change.
   useEffect(() => {
-    applyServerState(readReminders(mx));
-  }, [mx, applyServerState]);
-
-  const enqueueWrite = useCallback(
-    (compute: (current: Reminder[]) => Reminder[]): Promise<void> => {
-      const run = writeQueueRef.current.then(async () => {
-        const next = compute(latestRef.current);
-        latestRef.current = next;
-        setReminders(next);
-        await (mx as any).setAccountData(REMINDERS_KEY, { reminders: next });
-      });
-      // Keep the chain alive even if one write rejects, but propagate the
-      // rejection to this caller so it can react (e.g. retry).
-      writeQueueRef.current = run.catch(() => undefined);
-      return run;
-    },
-    [mx],
-  );
+    const state = ensureModuleState(mx);
+    setReminders(state.latest);
+    state.listeners.add(setReminders);
+    return () => {
+      state.listeners.delete(setReminders);
+    };
+  }, [mx]);
 
   const addReminder = useCallback(
-    (r: Reminder) => enqueueWrite((current) => [...current, r]),
-    [enqueueWrite],
+    (r: Reminder) => enqueueReminderWrite(mx, (current) => [...current, r]),
+    [mx],
   );
 
   const removeReminder = useCallback(
     (eventId: string, timestamp: number) =>
-      enqueueWrite((current) =>
+      enqueueReminderWrite(mx, (current) =>
         current.filter((r) => !(r.eventId === eventId && r.timestamp === timestamp)),
       ),
-    [enqueueWrite],
+    [mx],
   );
 
-  const getReminders = useCallback(() => reminders, [reminders]);
+  const getReminders = useCallback(() => ensureModuleState(mx).latest, [mx]);
 
   return { reminders, addReminder, removeReminder, getReminders };
 }

src/app/hooks/useRoomLatestRenderedEvent.ts

@@ -1,4 +1,11 @@
-import { MatrixEvent, Room, RoomEvent, RoomEventHandlerMap } from 'matrix-js-sdk';
+import {
+  MatrixEvent,
+  MatrixEventEvent,
+  MatrixEventHandlerMap,
+  Room,
+  RoomEvent,
+  RoomEventHandlerMap,
+} from 'matrix-js-sdk';
 import { useEffect, useState } from 'react';
 import { settingsAtom } from '../state/settings';
 import { useSetting } from '../state/hooks/settings';
@@ -45,11 +52,20 @@ export const useRoomLatestRenderedEvent = (room: Room) => {
     const handleTimelineEvent: RoomEventHandlerMap[RoomEvent.Timeline] = () => {
       setLatestEvent(getLatestEvent());
     };
+    // An E2EE message often arrives as an undecrypted placeholder and is decrypted
+    // shortly after — decryption does NOT re-fire RoomEvent.Timeline, so without this
+    // the DM preview stays stale ("Encrypted message") until the next timeline event.
+    const handleDecrypted: MatrixEventHandlerMap[MatrixEventEvent.Decrypted] = (event) => {
+      if (event.getRoomId() !== room.roomId) return;
+      setLatestEvent(getLatestEvent());
+    };
     setLatestEvent(getLatestEvent());
 
     room.on(RoomEvent.Timeline, handleTimelineEvent);
+    room.client.on(MatrixEventEvent.Decrypted, handleDecrypted);
     return () => {
       room.removeListener(RoomEvent.Timeline, handleTimelineEvent);
+      room.client.removeListener(MatrixEventEvent.Decrypted, handleDecrypted);
     };
   }, [room, hideMembershipEvents, hideNickAvatarEvents, showHiddenEvents]);
 

src/app/hooks/useTauriDnd.ts

@@ -1,6 +1,7 @@
+import { useEffect } from 'react';
 import { useSetAtom } from 'jotai';
 import { manualDndAtom } from '../state/manualDnd';
-import { useTauriEvent } from './useTauri';
+import { tauriInvoke, useTauriEvent } from './useTauri';
 
 /** Detail shape of the `lotus-dnd-changed` event emitted by the native side. */
 type DndChangedDetail = {
@@ -18,4 +19,17 @@ export function useTauriDnd(): void {
   const setDnd = useSetAtom(manualDndAtom);
 
   useTauriEvent<DndChangedDetail>('lotus-dnd-changed', ({ active }) => setDnd(active));
+
+  // Re-hydrate on mount. The tray CheckMenuItem persists its checkstate, but
+  // `manualDndAtom` is in-memory and resets to false on every reload (the
+  // custom-chrome toggle, logout). Without this the tray could show DND ON while
+  // notifications resume firing. Query the native tray state (`get_tray_dnd`) so
+  // they stay in sync. No-op in the browser.
+  useEffect(() => {
+    tauriInvoke()?.('get_tray_dnd')
+      .then((active) => {
+        if (typeof active === 'boolean') setDnd(active);
+      })
+      .catch(() => undefined);
+  }, [setDnd]);
 }

src/app/hooks/useTauriNotificationBadge.ts

@@ -18,6 +18,10 @@ export function useTauriNotificationBadge() {
 
     let totalHighlights = 0;
     roomToUnread.forEach((unread) => {
+      // Sum only leaf rooms (from === null); roomToUnread also holds per-ancestor
+      // space aggregates (from = Set), so counting all entries double-counts a
+      // space-nested room. Mirrors the favicon fix in ClientNonUIFeatures.
+      if (unread.from !== null) return;
       totalHighlights += unread.highlight;
     });
 

src/app/hooks/useTauriUpdater.ts

@@ -38,6 +38,10 @@ export function useTauriUpdater() {
     setStatus({ state: 'installing' });
     try {
       await invoke('install_update');
+      // On a successful install the native side calls app.restart(), so this
+      // resolve is only reached when nothing was installed (no update found) —
+      // don't leave the UI stuck on "installing".
+      setStatus({ state: 'up-to-date' });
     } catch (e) {
       setStatus({ state: 'error', message: String(e) });
     }

src/app/hooks/useUserNotes.ts

@@ -1,7 +1,6 @@
 import { useCallback, useEffect, useState } from 'react';
-import { MatrixClient } from 'matrix-js-sdk';
+import { ClientEvent, ClientEventHandlerMap, MatrixClient } from 'matrix-js-sdk';
 import { useMatrixClient } from './useMatrixClient';
-import { useAccountDataCallback } from './useAccountDataCallback';
 
 const NOTES_KEY = 'io.lotus.user_notes';
 export const USER_NOTE_MAX_LENGTH = 500;
@@ -12,39 +11,108 @@ function readNotes(mx: MatrixClient): UserNotesContent {
   return (mx.getAccountData(NOTES_KEY as any)?.getContent() as UserNotesContent | undefined) ?? {};
 }
 
+// Module-scoped serialization state.
+//
+// useUserNotes() can be mounted by many components at once, so a per-instance
+// latest/queue would only serialize writes within one instance. Notes for
+// different users saved from different instances (before the server echo lands)
+// would each compute from a stale snapshot and clobber each other, since
+// setAccountData replaces the whole record with no server merge. We therefore
+// keep a single shared latest record + write queue, keyed off the active client.
+type UserNotesModuleState = {
+  mx: MatrixClient;
+  latest: UserNotesContent;
+  writeQueue: Promise<unknown>;
+  listeners: Set<(record: UserNotesContent) => void>;
+  onAccountData: ClientEventHandlerMap[ClientEvent.AccountData];
+};
+
+let moduleState: UserNotesModuleState | null = null;
+
+// Lazily initialize the shared state for the given client. On a client change
+// (login/logout swaps the MatrixClient) we tear down the old subscription and
+// re-initialize against the new client so we never leak or double-subscribe.
+function ensureModuleState(mx: MatrixClient): UserNotesModuleState {
+  if (moduleState && moduleState.mx === mx) {
+    return moduleState;
+  }
+
+  if (moduleState) {
+    moduleState.mx.removeListener(ClientEvent.AccountData, moduleState.onAccountData);
+  }
+
+  const state: UserNotesModuleState = {
+    mx,
+    latest: readNotes(mx),
+    writeQueue: Promise.resolve(),
+    listeners: new Set(),
+    // Reassigned below once `state` is captured.
+    onAccountData: () => undefined,
+  };
+
+  state.onAccountData = (evt) => {
+    if (evt.getType() === NOTES_KEY) {
+      const record = evt.getContent<UserNotesContent>() ?? {};
+      state.latest = record;
+      state.listeners.forEach((listener) => listener(record));
+    }
+  };
+
+  mx.on(ClientEvent.AccountData, state.onAccountData);
+  moduleState = state;
+  return state;
+}
+
+function enqueueNotesWrite(
+  mx: MatrixClient,
+  compute: (current: UserNotesContent) => UserNotesContent,
+): Promise<void> {
+  const state = ensureModuleState(mx);
+  const run = state.writeQueue.then(async () => {
+    const next = compute(state.latest);
+    state.latest = next;
+    state.listeners.forEach((listener) => listener(next));
+    await (mx as any).setAccountData(NOTES_KEY, next);
+  });
+  // Keep the chain alive even if one write rejects, but propagate the
+  // rejection to this caller so it can react (e.g. retry).
+  state.writeQueue = run.catch(() => undefined);
+  return run;
+}
+
 export function useUserNotes(): {
   getNote: (userId: string) => string;
   setNote: (userId: string, note: string) => Promise<void>;
 } {
   const mx = useMatrixClient();
-  const [notes, setNotes] = useState<UserNotesContent>(() => readNotes(mx));
-
-  useAccountDataCallback(
-    mx,
-    useCallback((evt) => {
-      if (evt.getType() === NOTES_KEY) {
-        setNotes(evt.getContent<UserNotesContent>() ?? {});
-      }
-    }, []),
-  );
+  const [notes, setNotes] = useState<UserNotesContent>(() => ensureModuleState(mx).latest);
 
+  // Subscribe to the shared module state. A single AccountData listener is
+  // installed per client (in ensureModuleState); each hook instance only
+  // registers a local setter and unregisters it on unmount / client change.
   useEffect(() => {
-    setNotes(readNotes(mx));
+    const state = ensureModuleState(mx);
+    setNotes(state.latest);
+    state.listeners.add(setNotes);
+    return () => {
+      state.listeners.delete(setNotes);
+    };
   }, [mx]);
 
   const getNote = useCallback((userId: string) => notes[userId] ?? '', [notes]);
 
   const setNote = useCallback(
-    async (userId: string, note: string) => {
-      const current = readNotes(mx);
-      const updated = { ...current };
+    (userId: string, note: string) => {
       const trimmed = note.trim().slice(0, USER_NOTE_MAX_LENGTH);
-      if (trimmed) {
-        updated[userId] = trimmed;
-      } else {
-        delete updated[userId];
-      }
-      await (mx as any).setAccountData(NOTES_KEY, updated);
+      return enqueueNotesWrite(mx, (current) => {
+        const updated = { ...current };
+        if (trimmed) {
+          updated[userId] = trimmed;
+        } else {
+          delete updated[userId];
+        }
+        return updated;
+      });
     },
     [mx],
   );

src/app/hooks/useUserPresence.ts

@@ -29,6 +29,10 @@ export const useUserPresence = (userId: string): UserPresence | undefined => {
   const [presence, setPresence] = useState(() => (user ? getUserPresence(user) : undefined));
 
   useEffect(() => {
+    // Re-seed when the User object appears/changes after first render — the
+    // useState initializer only ran if `user` already existed at mount, so a
+    // late-arriving user would otherwise show no presence until the next event.
+    if (user) setPresence(getUserPresence(user));
     // Subscribe on mx (MatrixClient) rather than on individual User objects.
     // User objects have a default 10-listener limit; the same user can appear
     // in many components simultaneously (avatars, member list, etc.) and

src/app/pages/App.tsx

@@ -110,7 +110,11 @@ function DesktopChrome({ children }: { children: ReactNode }) {
     <div
       style={
         useChrome
-          ? { display: 'flex', flexDirection: 'column', height: '100vh' }
+          ? // Match html/#root (100dvh), NOT 100vh — in the Tauri webview 100vh
+            // can exceed the visible height after decorations are stripped, which
+            // makes the timeline's scroll container taller than the viewport and
+            // sends the virtual paginator into a runaway back-pagination loop.
+            { display: 'flex', flexDirection: 'column', height: '100dvh' }
           : { display: 'contents' }
       }
     >

src/app/pages/client/ClientNonUIFeatures.tsx

@@ -11,7 +11,7 @@ import {
 } from 'matrix-js-sdk';
 import { focusAssistActiveAtom } from '../../state/focusAssist';
 import { manualDndAtom } from '../../state/manualDnd';
-import { roomToUnreadAtom, unreadEqual, unreadInfoToUnread } from '../../state/room/roomToUnread';
+import { roomToUnreadAtom } from '../../state/room/roomToUnread';
 import LogoSVG from '../../../../public/res/lotus.png';
 import LogoUnreadSVG from '../../../../public/res/lotus-unread.png';
 import LogoHighlightSVG from '../../../../public/res/lotus-highlight.png';
@@ -32,15 +32,23 @@ import {
   getUnreadInfo,
   isNotificationEvent,
 } from '../../utils/room';
-import { NotificationType, UnreadInfo } from '../../../types/matrix/room';
+import { NotificationType } from '../../../types/matrix/room';
 import { getMxIdLocalPart, mxcUrlToHttp } from '../../utils/matrix';
 import { useSelectedRoom } from '../../hooks/router/useSelectedRoom';
 import { useInboxNotificationsSelected } from '../../hooks/router/useInbox';
 import { useMediaAuthentication } from '../../hooks/useMediaAuthentication';
-import { usePresenceUpdater } from '../../hooks/usePresenceUpdater';
+import { presenceStateFromSetting, usePresenceUpdater } from '../../hooks/usePresenceUpdater';
+import {
+  MAX_MUTE_TIMEOUT_MS,
+  MuteTimerEntry,
+  loadMuteTimers,
+  unmuteRoom,
+} from '../../features/room-nav/RoomNavItem';
+import { STATUS_EXPIRY_KEY, STATUS_MSG_KEY } from '../../features/settings/account/Profile';
 import { useDeepLinkNavigate } from '../../hooks/useDeepLinkNavigate';
 import { toastQueueAtom } from '../../state/toast';
 import { useReminders } from '../../hooks/useReminders';
+import { getRoomRetentionMs, isExpired } from '../../utils/retention';
 import { useTauriUpdater } from '../../hooks/useTauriUpdater';
 import { TauriDesktopFeatures } from '../../components/TauriDesktopFeatures';
 import { KeyboardShortcutsDialog, useKeyboardShortcutsTrigger } from '../../features/shortcuts';
@@ -96,6 +104,11 @@ function FaviconUpdater() {
     let totalNotif = 0;
     let totalHighlight = 0;
     roomToUnread.forEach((unread) => {
+      // roomToUnread holds BOTH leaf rooms and per-ancestor space aggregates
+      // (leaves have `from === null`, aggregates a Set). Sum only leaves —
+      // otherwise a space-nested room is counted once as the leaf and again in
+      // every ancestor space, inflating the tab title / favicon count.
+      if (unread.from !== null) return;
       totalNotif += unread.total;
       totalHighlight += unread.highlight;
     });
@@ -230,9 +243,95 @@ function PresenceUpdater() {
   return null;
 }
 
+// Restores timed-mute timers persisted by RoomNavItem across reloads. Bare
+// setTimeouts don't survive a page reload, so without this a scheduled unmute is
+// lost and the room stays muted forever. On boot: unmute anything already
+// past-due and re-arm a timer for each future entry (clamped to setTimeout's max).
+function MuteTimerRestore() {
+  const mx = useMatrixClient();
+
+  useEffect(() => {
+    const timers = loadMuteTimers();
+    if (timers.length === 0) return undefined;
+
+    const now = Date.now();
+    const pastDue: MuteTimerEntry[] = [];
+    const future: MuteTimerEntry[] = [];
+    timers.forEach((entry) => (entry.unmuteAt <= now ? pastDue : future).push(entry));
+
+    pastDue.forEach((entry) => {
+      unmuteRoom(mx, entry.roomId);
+    });
+
+    const handles = future.map((entry) =>
+      setTimeout(
+        () => {
+          unmuteRoom(mx, entry.roomId);
+        },
+        Math.min(entry.unmuteAt - now, MAX_MUTE_TIMEOUT_MS),
+      ),
+    );
+
+    return () => {
+      handles.forEach(clearTimeout);
+    };
+  }, [mx]);
+
+  return null;
+}
+
+// Fires the custom-status auto-clear even when Settings→Profile is closed. The
+// expiry setTimeout used to live in ProfileStatus, which unmounts on close, so
+// the status never cleared. This always-mounted watcher polls the persisted
+// expiry key and clears (preserving the user's chosen presence) when due.
+function StatusExpiryMonitor() {
+  const mx = useMatrixClient();
+  const [presenceStatus] = useSetting(settingsAtom, 'presenceStatus');
+  const [hidePresence] = useSetting(settingsAtom, 'hidePresence');
+  // Read latest settings via refs so the poll interval isn't torn down/restarted
+  // (resetting its countdown) whenever the presence setting changes.
+  const presenceStatusRef = useRef(presenceStatus);
+  presenceStatusRef.current = presenceStatus;
+  const hidePresenceRef = useRef(hidePresence);
+  hidePresenceRef.current = hidePresence;
+
+  useEffect(() => {
+    const userId = mx.getUserId();
+    if (!userId) return undefined;
+    const expiryKey = STATUS_EXPIRY_KEY(userId);
+    const msgKey = STATUS_MSG_KEY(userId);
+
+    const check = () => {
+      const stored = localStorage.getItem(expiryKey);
+      if (!stored) return;
+      const ts = parseInt(stored, 10);
+      if (!ts || Date.now() < ts) return;
+      localStorage.removeItem(msgKey);
+      localStorage.removeItem(expiryKey);
+      mx.setPresence({
+        presence: presenceStateFromSetting(presenceStatusRef.current, hidePresenceRef.current),
+        status_msg: '',
+      }).catch(() => undefined);
+    };
+
+    check();
+    const interval = setInterval(check, 30_000);
+    const onVisible = () => {
+      if (document.visibilityState === 'visible') check();
+    };
+    document.addEventListener('visibilitychange', onVisible);
+    return () => {
+      clearInterval(interval);
+      document.removeEventListener('visibilitychange', onVisible);
+    };
+  }, [mx]);
+
+  return null;
+}
+
 function MessageNotifications() {
   const audioRef = useRef<HTMLAudioElement>(null);
-  const unreadCacheRef = useRef<Map<string, UnreadInfo>>(new Map());
+  const lastNotifiedEventRef = useRef<Map<string, string>>(new Map());
   // Per-thread dedupe: threadId -> last notified eventId.
   const lastNotifiedThreadRef = useRef<Map<string, string>>(new Map());
   const mx = useMatrixClient();
@@ -367,17 +466,21 @@ function MessageNotifications() {
       const eventId = mEvent.getId();
       if (!sender || !eventId) return;
 
-      const unreadInfo = getUnreadInfo(room);
-      const cachedUnreadInfo = unreadCacheRef.current.get(room.roomId);
-      unreadCacheRef.current.set(room.roomId, unreadInfo);
+      // Dedupe on the event id (per room): the same event can re-fire (decryption,
+      // edit, thread repopulation). This replaces the old unread-COUNT dedupe,
+      // which suppressed a genuinely-new message whenever its post-read count
+      // matched the previously-notified count — i.e. "read a DM, next message
+      // never notifies/sounds" (the common one-at-a-time cadence).
+      if (lastNotifiedEventRef.current.get(room.roomId) === eventId) return;
 
-      if (unreadInfo.total === 0) return;
-      if (
-        cachedUnreadInfo &&
-        unreadEqual(unreadInfoToUnread(cachedUnreadInfo), unreadInfoToUnread(unreadInfo))
-      ) {
-        return;
-      }
+      // Main-timeline path respects push rules: don't notify when the room has no
+      // notification count (e.g. a non-mention in a Mentions-only room). The
+      // thread path is already gated by shouldNotifyThreadReply, so it must NOT
+      // re-gate on the room count — otherwise an explicit per-thread "All replies"
+      // override in a Mentions-only room is silently dropped.
+      if (!threadId && getUnreadInfo(room).total === 0) return;
+
+      lastNotifiedEventRef.current.set(room.roomId, eventId);
 
       const quietActive =
         focusAssistActive ||
@@ -585,6 +688,62 @@ function ReminderMonitor() {
   return null;
 }
 
+// MSC1763: opt-in local enforcement of room retention. When enabled, permanently
+// redacts the user's OWN messages once a room's retention window passes. Own-only
+// (no redact PL needed); scoped to loaded live-timeline events; dedupes in-flight
+// redactions and retries on the next tick. Default-off, so nothing auto-deletes
+// unless the user turns it on.
+function RetentionSweeper() {
+  const mx = useMatrixClient();
+  const [enforceRetentionLocally] = useSetting(settingsAtom, 'enforceRetentionLocally');
+  const enabledRef = useRef(enforceRetentionLocally);
+  enabledRef.current = enforceRetentionLocally;
+  const redactingRef = useRef<Set<string>>(new Set());
+
+  useEffect(() => {
+    const check = () => {
+      if (!enabledRef.current) return;
+      const myId = mx.getUserId();
+      if (!myId) return;
+      const now = Date.now();
+      mx.getRooms().forEach((room) => {
+        const maxLifetime = getRoomRetentionMs(room);
+        if (!maxLifetime) return;
+        room
+          .getLiveTimeline()
+          .getEvents()
+          .forEach((ev) => {
+            const evId = ev.getId();
+            if (!evId || ev.getSender() !== myId) return;
+            if (ev.isState() || ev.isRedacted() || ev.isSending()) return;
+            const t = ev.getType();
+            // Only actual messages — never our membership/topic/reactions.
+            if (t !== 'm.room.message' && t !== 'm.room.encrypted' && t !== 'm.sticker') return;
+            if (!isExpired(ev.getTs(), maxLifetime, now)) return;
+            if (redactingRef.current.has(evId)) return;
+            redactingRef.current.add(evId);
+            mx.redactEvent(room.roomId, evId, undefined, { reason: 'expired' }).catch(() => {
+              redactingRef.current.delete(evId);
+            });
+          });
+      });
+    };
+
+    check();
+    const interval = setInterval(check, 30_000);
+    const onVisible = () => {
+      if (document.visibilityState === 'visible') check();
+    };
+    document.addEventListener('visibilitychange', onVisible);
+    return () => {
+      clearInterval(interval);
+      document.removeEventListener('visibilitychange', onVisible);
+    };
+  }, [mx]);
+
+  return null;
+}
+
 const TAURI_UPDATE_CHECK_INTERVAL = 12 * 60 * 60_000; // 12 hours
 const TAURI_UPDATE_LAST_CHECK_KEY = 'lotus.tauriUpdateLastCheck';
 
@@ -666,9 +825,12 @@ export function ClientNonUIFeatures({ children }: ClientNonUIFeaturesProps) {
       <PageZoomFeature />
       <FaviconUpdater />
       <PresenceUpdater />
+      <MuteTimerRestore />
+      <StatusExpiryMonitor />
       <InviteNotifications />
       <MessageNotifications />
       <ReminderMonitor />
+      <RetentionSweeper />
       <TauriUpdateFeature />
       <TauriDesktopFeatures />
       <LotusDenoiseFeature />

src/app/pages/client/ClientRoot.tsx

@@ -31,6 +31,7 @@ import {
   logoutClient,
   startClient,
 } from '../../../client/initMatrix';
+import { deleteSearchCacheDatabase } from '../../utils/searchCache';
 import { SplashScreen } from '../../components/splash-screen';
 import { ServerConfigsLoader } from '../../components/ServerConfigsLoader';
 import { CapabilitiesProvider } from '../../hooks/useCapabilities';
@@ -43,6 +44,8 @@ import { stopPropagation } from '../../utils/keyboard';
 import { SyncStatus } from './SyncStatus';
 import { AuthMetadataProvider } from '../../hooks/useAuthMetadata';
 import { getFallbackSession, removeFallbackSession } from '../../state/sessions';
+import { pushSessionToSW } from '../../../sw-session';
+import { revokeOidcTokens } from '../../../client/oidcLogout';
 import { useSessionSync } from '../../hooks/useSessionSync';
 import { installCryptoDiagLog } from '../../utils/cryptoDiagLog';
 import { AutoDiscovery } from './AutoDiscovery';
@@ -142,8 +145,23 @@ function ClientRootOptions({ mx }: { mx?: MatrixClient }) {
 const useLogoutListener = (mx?: MatrixClient) => {
   useEffect(() => {
     const handleLogout: HttpApiEventHandlerMap[HttpApiEvent.SessionLoggedOut] = async () => {
+      // Clear the SW's cached bearer token so it stops attaching the now-revoked
+      // token to media fetches (mirrors the manual logoutClient path).
+      pushSessionToSW();
       mx?.stopClient();
+      // Best-effort issuer revocation for OIDC sessions (the token is already
+      // server-revoked here, but revoke the refresh token too). Before we drop
+      // the stored session below.
+      const loggedOutSession = getFallbackSession();
+      if (loggedOutSession?.oidc) {
+        await revokeOidcTokens(loggedOutSession).catch(() => undefined);
+      }
       await mx?.clearStores();
+      // The opt-in local search index holds DECRYPTED message plaintext. Wipe it
+      // on server-forced logout too (token expiry / remote sign-out / password
+      // change) — the manual logout path already does, but this path didn't, so
+      // the plaintext survived on disk (and persist() makes it non-evictable).
+      await deleteSearchCacheDatabase();
       // Remove only the session credential keys — NOT settings, drafts, and
       // other preferences (N98). The SDK's IndexedDB stores are cleared above;
       // window.localStorage.clear() is reserved for the explicit reset path.

src/app/pages/client/SidebarNav.tsx

@@ -24,6 +24,7 @@ import { CreateTab } from './sidebar/CreateTab';
 import { useSetting } from '../../state/hooks/settings';
 import { settingsAtom } from '../../state/settings';
 import { useTheme, ThemeKind } from '../../hooks/useTheme';
+import { useReducedMotion } from '../../hooks/useReducedMotion';
 import { getChatBg } from '../../features/lotus/chatBackground';
 
 export function SidebarNav() {
@@ -34,6 +35,7 @@ export function SidebarNav() {
   const [pauseAnimations] = useSetting(settingsAtom, 'pauseAnimations');
   const theme = useTheme();
   const isDark = theme.kind === ThemeKind.Dark;
+  const reduced = useReducedMotion();
 
   // backdrop-filter only blurs content directly behind the element in the z-axis.
   // The sidebar is a flex sibling of the room view, so nothing sits behind it by default.
@@ -53,17 +55,26 @@ export function SidebarNav() {
     }
 
     const effectiveBg = chatBackground !== 'none' ? chatBackground : 'tactical';
-    const bgStyle = getChatBg(effectiveBg, isDark, pauseAnimations);
+    const bgStyle = getChatBg(effectiveBg, isDark, pauseAnimations || reduced);
     style.backgroundImage = (bgStyle.backgroundImage as string | undefined) ?? '';
     style.backgroundColor = (bgStyle.backgroundColor as string | undefined) ?? '';
     style.backgroundSize = (bgStyle.backgroundSize as string | undefined) ?? '';
     style.backgroundPosition = (bgStyle.backgroundPosition as string | undefined) ?? '';
-    style.animation = (bgStyle.animation as string | undefined) ?? '';
-    // Promote animated backgrounds to their own compositor layer so the browser
-    // doesn't repaint the overlaid text/UI content on every animation frame.
-    if (bgStyle.animation) {
-      style.willChange = 'background-position, background-size';
+    // The animated body mirror (animation + will-change) exists solely so the
+    // glassmorphism sidebar can blur through document.body. When glass is OFF nothing
+    // samples this layer, yet SidebarNav is always mounted, so writing an animated bg +
+    // will-change here would leave a permanent invisible animated compositor layer
+    // app-wide. Only mirror the animation when glass is on; the static background above
+    // (needed by lotusTerminal / non-animated cases) is still written regardless.
+    if (glassmorphismSidebar) {
+      style.animation = (bgStyle.animation as string | undefined) ?? '';
+      if (bgStyle.animation) {
+        style.willChange = 'background-position, background-size';
+      } else {
+        style.removeProperty('will-change');
+      }
     } else {
+      style.removeProperty('animation');
       style.removeProperty('will-change');
     }
 
@@ -75,7 +86,7 @@ export function SidebarNav() {
       style.removeProperty('animation');
       style.removeProperty('will-change');
     };
-  }, [glassmorphismSidebar, chatBackground, lotusTerminal, isDark, pauseAnimations]);
+  }, [glassmorphismSidebar, chatBackground, lotusTerminal, isDark, pauseAnimations, reduced]);
 
   return (
     <Sidebar className={classNames(glassmorphismSidebar && SidebarGlass)}>

src/app/pages/client/direct/Direct.tsx

@@ -321,11 +321,7 @@ export function Direct() {
                   const selected = selectedRoomId === roomId;
 
                   return (
-                    <VirtualTile
-                      virtualItem={vItem}
-                      key={vItem.index}
-                      ref={virtualizer.measureElement}
-                    >
+                    <VirtualTile virtualItem={vItem} key={roomId} ref={virtualizer.measureElement}>
                       <RoomNavItem
                         room={room}
                         selected={selected}

src/app/pages/client/home/Home.tsx

@@ -223,6 +223,7 @@ const factoryRoomIdByUnread =
 
 const DEFAULT_CATEGORY_ID = makeNavCategoryId('home', 'room');
 const FAVORITES_CATEGORY_ID = makeNavCategoryId('home', 'favorite');
+const LOW_PRIORITY_CATEGORY_ID = makeNavCategoryId('home', 'lowpriority');
 export function Home() {
   const mx = useMatrixClient();
   useNavToActivePathMapper('home');
@@ -261,29 +262,66 @@ export function Home() {
   const roomToUnread = useAtomValue(roomToUnreadAtom);
   const [sortMenuAnchor, setSortMenuAnchor] = useState<RectCords>();
 
-  const { favoriteRooms, otherRooms } = useMemo(() => {
+  const { favoriteRooms, lowPriorityRooms, otherRooms } = useMemo(() => {
     const favs: string[] = [];
+    const low: string[] = [];
     const others: string[] = [];
     rooms.forEach((rId) => {
       const room = mx.getRoom(rId);
       if (room?.tags?.['m.favourite']) {
         favs.push(rId);
+      } else if (room?.tags?.['m.lowpriority']) {
+        low.push(rId);
       } else {
         others.push(rId);
       }
     });
-    return { favoriteRooms: favs, otherRooms: others };
+    return { favoriteRooms: favs, lowPriorityRooms: low, otherRooms: others };
   }, [mx, rooms]);
 
-  const sortedFavoriteRooms = useMemo(
-    () =>
-      Array.from(favoriteRooms).sort(
-        closedCategories.has(FAVORITES_CATEGORY_ID)
-          ? factoryRoomIdByActivity(mx)
-          : factoryRoomIdByAtoZ(mx),
-      ),
-    [mx, favoriteRooms, closedCategories],
-  );
+  const sortedFavoriteRooms = useMemo(() => {
+    const isClosed = closedCategories.has(FAVORITES_CATEGORY_ID);
+    const items = Array.from(favoriteRooms).sort(
+      isClosed ? factoryRoomIdByActivity(mx) : factoryRoomIdByAtoZ(mx),
+    );
+    if (isClosed) {
+      return items.filter((rId) => roomsWithUnreadSet.has(rId) || rId === selectedRoomId);
+    }
+    return items;
+  }, [mx, favoriteRooms, closedCategories, roomsWithUnreadSet, selectedRoomId]);
+
+  const filteredFavoriteRooms = useMemo(() => {
+    if (!filterQuery.trim()) return sortedFavoriteRooms;
+    const query = filterQuery.toLowerCase();
+    const localNames = getLocalRoomNamesContent(mx);
+    return sortedFavoriteRooms.filter((rId) => {
+      const localName = localNames.rooms[rId];
+      const matrixName = mx.getRoom(rId)?.name ?? '';
+      return (localName ?? matrixName).toLowerCase().includes(query);
+    });
+  }, [mx, sortedFavoriteRooms, filterQuery]);
+
+  const sortedLowPriorityRooms = useMemo(() => {
+    const isClosed = closedCategories.has(LOW_PRIORITY_CATEGORY_ID);
+    const items = Array.from(lowPriorityRooms).sort(
+      isClosed ? factoryRoomIdByActivity(mx) : factoryRoomIdByAtoZ(mx),
+    );
+    if (isClosed) {
+      return items.filter((rId) => roomsWithUnreadSet.has(rId) || rId === selectedRoomId);
+    }
+    return items;
+  }, [mx, lowPriorityRooms, closedCategories, roomsWithUnreadSet, selectedRoomId]);
+
+  const filteredLowPriorityRooms = useMemo(() => {
+    if (!filterQuery.trim()) return sortedLowPriorityRooms;
+    const query = filterQuery.toLowerCase();
+    const localNames = getLocalRoomNamesContent(mx);
+    return sortedLowPriorityRooms.filter((rId) => {
+      const localName = localNames.rooms[rId];
+      const matrixName = mx.getRoom(rId)?.name ?? '';
+      return (localName ?? matrixName).toLowerCase().includes(query);
+    });
+  }, [mx, sortedLowPriorityRooms, filterQuery]);
 
   const sortedRooms = useMemo(() => {
     const isClosed = closedCategories.has(DEFAULT_CATEGORY_ID);
@@ -324,7 +362,7 @@ export function Home() {
   }, [mx, sortedRooms, filterQuery]);
 
   const favVirtualizer = useVirtualizer({
-    count: sortedFavoriteRooms.length,
+    count: filteredFavoriteRooms.length,
     getScrollElement: () => scrollRef.current,
     estimateSize: () => 38,
     overscan: 10,
@@ -337,6 +375,13 @@ export function Home() {
     overscan: 10,
   });
 
+  const lowVirtualizer = useVirtualizer({
+    count: filteredLowPriorityRooms.length,
+    getScrollElement: () => scrollRef.current,
+    estimateSize: () => 38,
+    overscan: 10,
+  });
+
   const handleCategoryClick = useCategoryHandler(setClosedCategories, (categoryId) =>
     closedCategories.has(categoryId),
   );
@@ -453,7 +498,7 @@ export function Home() {
                 />
               </Box>
             </NavCategory>
-            {sortedFavoriteRooms.length > 0 && (
+            {favoriteRooms.length > 0 && (
               <NavCategory>
                 <NavCategoryHeader>
                   <RoomNavCategoryButton
@@ -466,13 +511,13 @@ export function Home() {
                 </NavCategoryHeader>
                 <div style={{ position: 'relative', height: favVirtualizer.getTotalSize() }}>
                   {favVirtualizer.getVirtualItems().map((vItem) => {
-                    const roomId = sortedFavoriteRooms[vItem.index];
+                    const roomId = filteredFavoriteRooms[vItem.index];
                     const room = mx.getRoom(roomId);
                     if (!room) return null;
                     return (
                       <VirtualTile
                         virtualItem={vItem}
-                        key={vItem.index}
+                        key={roomId}
                         ref={favVirtualizer.measureElement}
                       >
                         <RoomNavItem
@@ -611,11 +656,7 @@ export function Home() {
                   const selected = selectedRoomId === roomId;
 
                   return (
-                    <VirtualTile
-                      virtualItem={vItem}
-                      key={vItem.index}
-                      ref={virtualizer.measureElement}
-                    >
+                    <VirtualTile virtualItem={vItem} key={roomId} ref={virtualizer.measureElement}>
                       <RoomNavItem
                         room={room}
                         selected={selected}
@@ -630,6 +671,43 @@ export function Home() {
                 })}
               </div>
             </NavCategory>
+            {lowPriorityRooms.length > 0 && (
+              <NavCategory>
+                <NavCategoryHeader>
+                  <RoomNavCategoryButton
+                    closed={closedCategories.has(LOW_PRIORITY_CATEGORY_ID)}
+                    data-category-id={LOW_PRIORITY_CATEGORY_ID}
+                    onClick={handleCategoryClick}
+                  >
+                    Low Priority
+                  </RoomNavCategoryButton>
+                </NavCategoryHeader>
+                <div style={{ position: 'relative', height: lowVirtualizer.getTotalSize() }}>
+                  {lowVirtualizer.getVirtualItems().map((vItem) => {
+                    const roomId = filteredLowPriorityRooms[vItem.index];
+                    const room = mx.getRoom(roomId);
+                    if (!room) return null;
+                    return (
+                      <VirtualTile
+                        virtualItem={vItem}
+                        key={roomId}
+                        ref={lowVirtualizer.measureElement}
+                      >
+                        <RoomNavItem
+                          room={room}
+                          selected={selectedRoomId === roomId}
+                          linkPath={getHomeRoomPath(getCanonicalAliasOrRoomId(mx, roomId))}
+                          notificationMode={getRoomNotificationMode(
+                            notificationPreferences,
+                            room.roomId,
+                          )}
+                        />
+                      </VirtualTile>
+                    );
+                  })}
+                </div>
+              </NavCategory>
+            )}
           </Box>
         </PageNavContent>
       )}

src/app/plugins/call/CallControl.ts

@@ -29,8 +29,22 @@ export class CallControl extends EventEmitter implements CallControlState {
 
   private controlMutationObserver: MutationObserver;
 
+  // C-H3: coalesces bursts of body-subtree mutations into a single debounced
+  // re-observe pass so a busy EC re-render doesn't thrash the control observer.
+  private bodyMutationTimer?: ReturnType<typeof setTimeout>;
+
   private _pipMode = false;
 
+  // C-M3: last quality payload requested via setQuality(). Held so we can (re)send
+  // it once joined (io.lotus.set_quality must not be sent before call-join — a
+  // pre-join send pends to a 10s widget timeout, mirroring the deafen gate).
+  private lastQuality: LotusQualityPayload | null = null;
+
+  // C-M5: set true by CallControls while a push-to-talk key is held. A PTT hold
+  // unmutes the mic transiently, and onMediaState() must NOT treat that as a
+  // user-initiated unmute that auto-undeafens the user.
+  public pttActive = false;
+
   // P6-2: mirrors CallEmbed.joined. Set true from forceState(), which CallEmbed
   // invokes only from onCallJoined(). Gates io.lotus.set_deafen so we never send
   // before the fork's widget handler mounts (pre-join sends pend to a 10s
@@ -153,19 +167,43 @@ export class CallControl extends EventEmitter implements CallControlState {
     // this.joined was still false, so it was gated — this is the first send.)
     this.joined = true;
     this.sendDeafenState();
+    this.sendQuality();
+  }
+
+  /**
+   * C-H1 / C-M3: re-push the sticky fork-side state (deafen + quality) after an
+   * EC reconnect. Unlike forceState() this does NOT touch mic/video, so a
+   * reconnect can't clobber the user's live media state — it only re-arms the
+   * fork handlers that remount on reconnect.
+   */
+  public resendForkState(): void {
+    this.sendDeafenState();
+    this.sendQuality();
   }
 
   public startObserving() {
     if (!this.document) return;
 
+    // C-H3: watch the whole body subtree (not just direct children) so we
+    // re-bind the control observer when EC re-renders its controls deeper in the
+    // tree. Debounced via onBodyMutation() to avoid thrashing on busy renders.
     this.bodyMutationObserver.observe(this.document.body, {
       childList: true,
-      subtree: false, // only direct children of body
+      subtree: true,
     });
-    this.onBodyMutation();
+    this.applyBodyMutation();
   }
 
   private onBodyMutation() {
+    // C-H3: coalesce a burst of subtree mutations into one debounced pass.
+    if (this.bodyMutationTimer !== undefined) return;
+    this.bodyMutationTimer = setTimeout(() => {
+      this.bodyMutationTimer = undefined;
+      this.applyBodyMutation();
+    }, 100);
+  }
+
+  private applyBodyMutation() {
     if (!this.document) return;
 
     this.document.body.style.setProperty('background', 'none', 'important');
@@ -266,22 +304,43 @@ export class CallControl extends EventEmitter implements CallControlState {
     this.state = state;
     this.emitStateUpdate();
 
-    if (this.microphone && !this.sound) {
+    // C-M5: auto-undeafen when the mic turns on, but NOT for a transient
+    // push-to-talk unmute — a PTT tap while deafened must not silently
+    // un-deafen the user.
+    if (this.microphone && !this.sound && !this.pttActive) {
       this.toggleSound();
     }
   }
 
   private onControlMutation() {
+    const wasScreensharing = this.screenshare;
     const screenshare: boolean = this.screenshareButton?.getAttribute('data-kind') === 'primary';
     const spotlight: boolean = this.spotlightButton?.checked ?? false;
 
+    // C-M6: when a screenshare stops, clear the screenshare-audio mute so a
+    // later screenshare doesn't start pre-muted.
+    const screenshareAudioMuted =
+      wasScreensharing && !screenshare ? false : this.screenshareAudioMuted;
+
+    // C-H3: the body observer now watches subtree:true, so this fires on any DOM
+    // churn in EC's controls. Only re-emit (→ re-render every consumer) when one
+    // of the values this method derives actually changed — microphone/video/sound
+    // are copied unchanged from the current state here.
+    if (
+      this.state.screenshare === screenshare &&
+      this.state.spotlight === spotlight &&
+      this.state.screenshareAudioMuted === screenshareAudioMuted
+    ) {
+      return;
+    }
+
     this.state = new CallControlState(
       this.microphone,
       this.video,
       this.sound,
       screenshare,
       spotlight,
-      this.screenshareAudioMuted,
+      screenshareAudioMuted,
     );
     this.emitStateUpdate();
   }
@@ -423,10 +482,25 @@ export class CallControl extends EventEmitter implements CallControlState {
    * clamped fork-side, so out-of-range input can't brick the encoder.
    */
   public setQuality(settings: LotusQualityPayload): void {
-    this.call.transport.send('io.lotus.set_quality', settings).catch(() => undefined);
+    // C-M3: remember the request and only send once joined; sendQuality() gates
+    // on this.joined so a pre-join call is a no-op that we replay on join.
+    this.lastQuality = settings;
+    this.sendQuality();
+  }
+
+  // C-M3: push the last-requested quality to the fork. Gated on this.joined so
+  // we never send io.lotus.set_quality before the fork's handler mounts (a
+  // pre-join send would pend to a 10s widget timeout).
+  private sendQuality(): void {
+    if (!this.joined || !this.lastQuality) return;
+    this.call.transport.send('io.lotus.set_quality', this.lastQuality).catch(() => undefined);
   }
 
   public dispose() {
+    if (this.bodyMutationTimer !== undefined) {
+      clearTimeout(this.bodyMutationTimer);
+      this.bodyMutationTimer = undefined;
+    }
     this.bodyMutationObserver.disconnect();
     this.controlMutationObserver.disconnect();
   }

src/app/plugins/call/CallEmbed.ts

@@ -57,6 +57,10 @@ export class CallEmbed {
 
   public joined = false;
 
+  // C-M4: set once dispose() has run so the hangup fallback timer can tell
+  // whether the embed was already torn down by the normal Close/Hangup echo.
+  public disposed = false;
+
   // [lotus #2] Latest per-participant state from io.lotus.call_state, or null
   // until the fork sends the first one. When non-null, the speaker/mute hooks
   // read it instead of scraping the EC iframe DOM.
@@ -403,6 +407,8 @@ export class CallEmbed {
    * @param opts
    */
   public dispose(): void {
+    if (this.disposed) return;
+    this.disposed = true;
     this.disposables.forEach((disposable) => {
       disposable();
     });
@@ -501,9 +507,19 @@ export class CallEmbed {
 
   private onCallJoined(): void {
     this.settleLoad();
-    this.joined = true;
     this.applyStyles();
     this.control.startObserving();
+
+    // C-H1: EC fires JoinCall again on an EC reconnect (this action has no
+    // once-guard). forceState() would reset live mic/video/deafen back to the
+    // join-time snapshot, so only run it on the FIRST join. On a rejoin we just
+    // re-apply styles/observers (above) and re-push the sticky fork state
+    // (deafen/quality), leaving the user's live media state untouched.
+    if (this.joined) {
+      this.control.resendForkState();
+      return;
+    }
+    this.joined = true;
     // EC ignores io.element.device_mute before join; re-apply desired state now that EC is live
     this.control.forceState(this.initialState);
   }

src/app/state/hooks/useBindAtoms.ts

@@ -3,6 +3,7 @@ import { allInvitesAtom, useBindAllInvitesAtom } from '../room-list/inviteList';
 import { allRoomsAtom, useBindAllRoomsAtom } from '../room-list/roomList';
 import { mDirectAtom, useBindMDirectAtom } from '../mDirectList';
 import { roomToUnreadAtom, useBindRoomToUnreadAtom } from '../room/roomToUnread';
+import { markedUnreadAtom, useBindMarkedUnreadAtom } from '../room/markedUnread';
 import { roomToParentsAtom, useBindRoomToParentsAtom } from '../room/roomToParents';
 import { roomIdToTypingMembersAtom, useBindRoomIdToTypingMembersAtom } from '../typingMembers';
 import { threadNotificationsAtom, useBindThreadNotificationsAtom } from '../threadNotifications';
@@ -14,6 +15,7 @@ export const useBindAtoms = (mx: MatrixClient) => {
   useBindRoomToParentsAtom(mx, roomToParentsAtom);
   useBindThreadNotificationsAtom(mx, threadNotificationsAtom);
   useBindRoomToUnreadAtom(mx, roomToUnreadAtom);
+  useBindMarkedUnreadAtom(mx, markedUnreadAtom);
 
   useBindRoomIdToTypingMembersAtom(mx, roomIdToTypingMembersAtom);
 };

src/app/state/room/markedUnread.test.ts

@@ -0,0 +1,65 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { MatrixEvent } from 'matrix-js-sdk';
+import { receiptIsMine, setMarkedUnread } from './markedUnread';
+
+// MSC2867 mark-as-unread: reading a room (our own receipt) clears the flag, so
+// `receiptIsMine` must detect only OUR receipt and ignore others'. And a write
+// must land on BOTH the stable `m.marked_unread` and the unstable
+// `com.famedly.marked_unread` key so it round-trips across servers/clients.
+
+const ME = '@me:server';
+const OTHER = '@friend:server';
+
+const receiptEvent = (content: object): MatrixEvent =>
+  ({ getContent: () => content }) as MatrixEvent;
+
+test('receiptIsMine: true when the receipt content carries our user id', () => {
+  const event = receiptEvent({
+    $abc: { 'm.read': { [ME]: { ts: 1 } } },
+  });
+  assert.equal(receiptIsMine(event, ME), true);
+});
+
+test('receiptIsMine: false when only another user has a receipt', () => {
+  const event = receiptEvent({
+    $abc: { 'm.read': { [OTHER]: { ts: 1 } } },
+  });
+  assert.equal(receiptIsMine(event, ME), false);
+});
+
+test('receiptIsMine: tolerates empty / malformed content', () => {
+  assert.equal(receiptIsMine(receiptEvent({}), ME), false);
+  assert.equal(receiptIsMine(receiptEvent({ $x: {} }), ME), false);
+});
+
+test('setMarkedUnread writes both the stable and unstable keys with the flag', async () => {
+  const calls: Array<{ type: string; content: unknown }> = [];
+  const mx = {
+    setRoomAccountData: (_roomId: string, type: string, content: unknown) => {
+      calls.push({ type, content });
+      return Promise.resolve();
+    },
+  } as any;
+
+  await setMarkedUnread(mx, '!room:server', true);
+
+  const types = calls.map((c) => c.type).sort();
+  assert.deepEqual(types, ['com.famedly.marked_unread', 'm.marked_unread']);
+  assert.ok(calls.every((c) => (c.content as { unread: boolean }).unread === true));
+});
+
+test('setMarkedUnread(false) clears both keys and does not reject if the unstable write fails', async () => {
+  const seen: string[] = [];
+  const mx = {
+    setRoomAccountData: (_roomId: string, type: string) => {
+      seen.push(type);
+      // Simulate an older server rejecting the unstable key — must not reject.
+      if (type === 'com.famedly.marked_unread') return Promise.reject(new Error('unknown type'));
+      return Promise.resolve();
+    },
+  } as any;
+
+  await assert.doesNotReject(() => setMarkedUnread(mx, '!room:server', false));
+  assert.ok(seen.includes('m.marked_unread'));
+});

src/app/state/room/markedUnread.ts

@@ -0,0 +1,97 @@
+import { atom, useSetAtom } from 'jotai';
+import { MatrixClient, MatrixEvent, Room, RoomEvent, RoomEventHandlerMap } from 'matrix-js-sdk';
+import { useEffect } from 'react';
+import { AccountDataEvent } from '../../../types/matrix/accountData';
+
+// MSC2867 — "mark a room as unread". A per-room account-data flag `{ unread }`.
+// Stable type `m.marked_unread`; servers/clients predating the stabilization use
+// the unstable `com.famedly.marked_unread`. We read either and write both so the
+// flag round-trips across the ecosystem.
+const UNSTABLE_MARKED_UNREAD = 'com.famedly.marked_unread';
+
+const readMarkedUnread = (room: Room): boolean => {
+  const stable = room.getAccountData(AccountDataEvent.MarkedUnread)?.getContent()?.unread;
+  if (typeof stable === 'boolean') return stable;
+  return room.getAccountData(UNSTABLE_MARKED_UNREAD)?.getContent()?.unread === true;
+};
+
+/** Set of room ids the user has explicitly marked as unread. */
+export const markedUnreadAtom = atom<Set<string>>(new Set<string>());
+
+/** Write (or clear) the marked-unread flag on both the stable + unstable keys. */
+export const setMarkedUnread = (
+  mx: MatrixClient,
+  roomId: string,
+  unread: boolean,
+): Promise<unknown> =>
+  Promise.all([
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    mx.setRoomAccountData(roomId, AccountDataEvent.MarkedUnread as any, { unread }),
+    // Best-effort mirror for older servers; never fail the primary write on it.
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    mx.setRoomAccountData(roomId, UNSTABLE_MARKED_UNREAD as any, { unread }).catch(() => undefined),
+  ]);
+
+export const receiptIsMine = (event: MatrixEvent, userId: string): boolean => {
+  const content = event.getContent();
+  return Object.keys(content).some((eventId) =>
+    Object.keys(content[eventId] ?? {}).some(
+      (receiptType) => content[eventId][receiptType]?.[userId],
+    ),
+  );
+};
+
+export const useBindMarkedUnreadAtom = (mx: MatrixClient, anAtom: typeof markedUnreadAtom) => {
+  const setAtom = useSetAtom(anAtom);
+
+  useEffect(() => {
+    const seed = new Set<string>();
+    mx.getRooms().forEach((room) => {
+      if (readMarkedUnread(room)) seed.add(room.roomId);
+    });
+    setAtom(seed);
+
+    const syncRoom = (room: Room) => {
+      const marked = readMarkedUnread(room);
+      setAtom((prev) => {
+        if (marked === prev.has(room.roomId)) return prev;
+        const next = new Set(prev);
+        if (marked) next.add(room.roomId);
+        else next.delete(room.roomId);
+        return next;
+      });
+    };
+
+    const onAccountData: RoomEventHandlerMap[RoomEvent.AccountData] = (_event, room) => {
+      syncRoom(room);
+    };
+    // Reading a room clears its marked-unread flag (MSC2867): when our own read
+    // receipt lands for a room that's currently marked, clear it.
+    const onReceipt: RoomEventHandlerMap[RoomEvent.Receipt] = (event, room) => {
+      const myId = mx.getUserId();
+      if (!myId || !readMarkedUnread(room)) return;
+      if (receiptIsMine(event, myId)) {
+        setMarkedUnread(mx, room.roomId, false).catch(() => undefined);
+      }
+    };
+    const onMembership: RoomEventHandlerMap[RoomEvent.MyMembership] = (room) => {
+      if (room.getMyMembership() !== 'join') {
+        setAtom((prev) => {
+          if (!prev.has(room.roomId)) return prev;
+          const next = new Set(prev);
+          next.delete(room.roomId);
+          return next;
+        });
+      }
+    };
+
+    mx.on(RoomEvent.AccountData, onAccountData);
+    mx.on(RoomEvent.Receipt, onReceipt);
+    mx.on(RoomEvent.MyMembership, onMembership);
+    return () => {
+      mx.removeListener(RoomEvent.AccountData, onAccountData);
+      mx.removeListener(RoomEvent.Receipt, onReceipt);
+      mx.removeListener(RoomEvent.MyMembership, onMembership);
+    };
+  }, [mx, setAtom]);
+};

src/app/state/room/roomToUnread.ts

@@ -24,6 +24,7 @@ import {
   getUnreadInfo,
   getUnreadInfos,
   isNotificationEvent,
+  roomHaveUnread,
 } from '../../utils/room';
 import { roomToParentsAtom } from './roomToParents';
 import { useStateEventCallback } from '../../hooks/useStateEventCallback';
@@ -82,7 +83,9 @@ const deleteUnreadInfo = (roomToUnread: RoomToUnread, allParents: Set<string>, r
   allParents.forEach((parentId) => {
     const oldParentUnread = roomToUnread.get(parentId);
     if (!oldParentUnread) return;
-    const newFrom = new Set([...(oldParentUnread.from ?? roomId)]);
+    // `from` is always a Set for parent aggregates; the fallback must be an
+    // iterable of ids, NOT the roomId string (which would spread into chars).
+    const newFrom = new Set([...(oldParentUnread.from ?? [])]);
     newFrom.delete(roomId);
     if (newFrom.size === 0) {
       roomToUnread.delete(parentId);
@@ -253,7 +256,20 @@ export const useBindRoomToUnreadAtom = (mx: MatrixClient, unreadAtom: typeof roo
         ),
       );
       if (isMyReceipt) {
-        setUnreadAtom({ type: 'DELETE', roomId: room.roomId });
+        // Don't blanket-DELETE the room's unread on any receipt: a THREADED
+        // receipt (reading one thread) would wipe the room's still-valid
+        // main-timeline badge, and if the room was already read no
+        // UnreadNotifications PUT follows to restore it. Recompute instead —
+        // DELETE only when the room is genuinely fully read.
+        const info = getUnreadInfo(
+          room,
+          getMutedThreads(threadNotificationsRef.current, room.roomId),
+        );
+        if (info.total === 0 && info.highlight === 0 && !roomHaveUnread(mx, room)) {
+          setUnreadAtom({ type: 'DELETE', roomId: room.roomId });
+        } else {
+          setUnreadAtom({ type: 'PUT', unreadInfo: info });
+        }
       }
     };
     mx.on(RoomEvent.Receipt, handleReceipt);

src/app/state/sessions.ts

@@ -264,7 +264,21 @@ export const removeFallbackSession = () => {
 // the next setFallbackSession then persists the blob. When both exist the blob
 // wins by construction.
 export const getFallbackSession = (): Session | undefined => {
-  const persisted = readSessionBlob() ?? readLegacyKeys();
+  const blob = readSessionBlob();
+  const legacy = readLegacyKeys();
+  // Prefer the atomic blob, EXCEPT when the legacy keys carry a later expiry: a
+  // pre-blob build's token refresh writes only the legacy keys, so a
+  // downgrade→upgrade can leave a stale blob newer than fresh legacy keys →
+  // booting on a dead token. Whichever has the later expiresAt wins.
+  let persisted = blob ?? legacy;
+  if (
+    blob &&
+    legacy &&
+    typeof legacy.expiresAt === 'number' &&
+    (typeof blob.expiresAt !== 'number' || legacy.expiresAt > blob.expiresAt)
+  ) {
+    persisted = legacy;
+  }
   if (!persisted) return undefined;
   return sessionFromPersisted(persisted);
 };

src/app/state/settings.ts

@@ -183,6 +183,9 @@ export interface Settings {
   urlPreview: boolean;
   encUrlPreview: boolean;
   showHiddenEvents: boolean;
+  // [MSC1763] Opt-in: permanently redact your OWN messages once a room's
+  // retention window passes (default off — nothing auto-deletes by surprise).
+  enforceRetentionLocally: boolean;
   legacyUsernameColor: boolean;
 
   showNotifications: boolean;
@@ -288,6 +291,7 @@ const defaultSettings: Settings = {
   urlPreview: true,
   encUrlPreview: true,
   showHiddenEvents: false,
+  enforceRetentionLocally: false,
   legacyUsernameColor: false,
 
   showNotifications: true,

src/app/utils/imageCompression.ts

@@ -1,5 +1,7 @@
 export type CompressionResult = {
   blob: Blob;
+  /** MIME type of the produced blob (currently always image/jpeg). */
+  type: string;
   originalSize: number;
   compressedSize: number;
   width: number;
@@ -17,22 +19,47 @@ export function isCompressible(file: File | Blob): boolean {
   return isCompressibleType(file.type);
 }
 
+const JPEG_OUTPUT_TYPE = 'image/jpeg';
+
 /**
  * Compress an image file via canvas.toBlob → JPEG at the given quality.
- * Returns null if the browser cannot render the image (e.g. unsupported codec).
+ * Returns null if the browser cannot render the image (e.g. unsupported codec)
+ * or if the source is left untouched to avoid data loss (see below).
+ *
+ * PNG is skipped entirely: it may carry an alpha channel, and re-encoding to
+ * JPEG composites transparency onto an opaque (black) background, corrupting the
+ * image. Returning null makes callers fall back to uploading the lossless
+ * original. The image is decoded with `imageOrientation: 'from-image'` so any
+ * EXIF orientation is baked into the pixels instead of being silently dropped.
  */
 export async function compressImage(
   file: File | Blob,
   quality = 0.82,
 ): Promise<CompressionResult | null> {
   if (!isCompressibleType(file.type)) return null;
+  // Skip PNG (potential alpha) — re-encoding to JPEG would flatten transparency.
+  if (file.type === 'image/png') return null;
 
-  const img = await loadImage(file);
+  let bitmap: ImageBitmap;
+  try {
+    bitmap = await createImageBitmap(file, { imageOrientation: 'from-image' });
+  } catch {
+    // Corrupt/unsupported source: fall back to uploading the lossless original
+    // (the caller uses the original file on a null result) rather than rejecting,
+    // which would drop the file entirely from the Promise.allSettled upload.
+    return null;
+  }
+  const { width, height } = bitmap;
   const canvas = document.createElement('canvas');
-  canvas.width = img.naturalWidth;
-  canvas.height = img.naturalHeight;
-  const ctx = canvas.getContext('2d')!;
-  ctx.drawImage(img, 0, 0);
+  canvas.width = width;
+  canvas.height = height;
+  const ctx = canvas.getContext('2d');
+  if (!ctx) {
+    bitmap.close();
+    return null;
+  }
+  ctx.drawImage(bitmap, 0, 0);
+  bitmap.close();
 
   return new Promise((resolve) => {
     canvas.toBlob(
@@ -43,31 +70,19 @@ export async function compressImage(
         }
         resolve({
           blob,
+          type: JPEG_OUTPUT_TYPE,
           originalSize: file.size,
           compressedSize: blob.size,
-          width: img.naturalWidth,
-          height: img.naturalHeight,
+          width,
+          height,
         });
       },
-      'image/jpeg',
+      JPEG_OUTPUT_TYPE,
       quality,
     );
   });
 }
 
-function loadImage(file: File | Blob): Promise<HTMLImageElement> {
-  return new Promise((resolve, reject) => {
-    const url = URL.createObjectURL(file);
-    const img = new Image();
-    img.onload = () => {
-      URL.revokeObjectURL(url);
-      resolve(img);
-    };
-    img.onerror = reject;
-    img.src = url;
-  });
-}
-
 export function formatFileSize(bytes: number): string {
   if (bytes < 1024) return `${bytes} B`;
   if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`;

src/app/utils/notifications.test.ts

@@ -0,0 +1,126 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { NotificationCountType, ReceiptType } from 'matrix-js-sdk';
+import { markAsRead } from './notifications';
+
+// markAsRead sends an unthreaded read receipt at the latest main-timeline event,
+// plus a THREADED receipt at each unread thread's latest loaded reply. The
+// regression these tests guard against: a thread whose replies aren't loaded
+// (lastReply() === null) must NOT produce a receipt for the thread root — that
+// resolves to a MAIN receipt at an old event and permanently unreads the room.
+
+type ReceiptCall = { eventId: string; receiptType: ReceiptType; unthreaded?: boolean };
+
+const evt = (id: string, sending = false) => ({ getId: () => id, isSending: () => sending }) as any;
+
+const thread = (id: string, lastReply: any) => ({ id, lastReply: () => lastReply }) as any;
+
+type RoomOpts = {
+  timeline?: any[];
+  readUpTo?: string | null;
+  threads?: any[];
+  threadUnread?: Record<string, number>;
+};
+
+const setup = (opts: RoomOpts) => {
+  const calls: ReceiptCall[] = [];
+  const room = {
+    getLiveTimeline: () => ({ getEvents: () => opts.timeline ?? [] }),
+    getEventReadUpTo: () => opts.readUpTo ?? null,
+    getThreads: () => opts.threads ?? [],
+    getThreadUnreadNotificationCount: (threadId: string, _type: NotificationCountType) =>
+      opts.threadUnread?.[threadId] ?? 0,
+  };
+  const mx = {
+    getRoom: () => room,
+    getUserId: () => '@me:server',
+    sendReadReceipt: async (event: any, receiptType: ReceiptType, unthreaded?: boolean) => {
+      calls.push({ eventId: event.getId(), receiptType, unthreaded });
+      return {};
+    },
+  } as any;
+  return { mx, calls };
+};
+
+test('main timeline: unthreaded receipt at the latest event', async () => {
+  const { mx, calls } = setup({ timeline: [evt('a'), evt('b'), evt('c')], readUpTo: 'a' });
+  await markAsRead(mx, '!r:server', false);
+  assert.equal(calls.length, 1);
+  assert.deepEqual(calls[0], { eventId: 'c', receiptType: ReceiptType.Read, unthreaded: true });
+});
+
+test('REGRESSION: an unread thread with unloaded replies (lastReply null) sends NO root receipt', async () => {
+  const t = thread('$root', null); // replies not loaded
+  const { mx, calls } = setup({
+    timeline: [evt('a'), evt('b')],
+    readUpTo: 'a',
+    threads: [t],
+    threadUnread: { $root: 3 },
+  });
+  await markAsRead(mx, '!r:server', false);
+  // Only the main unthreaded receipt — never a receipt for the thread root.
+  assert.equal(calls.length, 1);
+  assert.equal(calls[0].eventId, 'b');
+  assert.equal(calls[0].unthreaded, true);
+  assert.ok(!calls.some((c) => c.eventId === '$root'));
+});
+
+test('unread thread with a loaded reply sends a threaded receipt at that reply', async () => {
+  const t = thread('$root', evt('$reply'));
+  const { mx, calls } = setup({
+    timeline: [evt('a'), evt('b')],
+    readUpTo: 'a',
+    threads: [t],
+    threadUnread: { $root: 1 },
+  });
+  await markAsRead(mx, '!r:server', false);
+  const main = calls.find((c) => c.eventId === 'b');
+  const threaded = calls.find((c) => c.eventId === '$reply');
+  assert.ok(main && main.unthreaded === true);
+  assert.ok(threaded && threaded.unthreaded === false);
+  assert.equal(calls.length, 2);
+});
+
+test('main already read but a thread is unread: no main receipt, threaded receipt only', async () => {
+  const t = thread('$root', evt('$reply'));
+  const { mx, calls } = setup({
+    timeline: [evt('a'), evt('b')],
+    readUpTo: 'b', // latest main event already read → getLatestValidEvent() null
+    threads: [t],
+    threadUnread: { $root: 2 },
+  });
+  await markAsRead(mx, '!r:server', false);
+  assert.equal(calls.length, 1);
+  assert.equal(calls[0].eventId, '$reply');
+  assert.equal(calls[0].unthreaded, false);
+});
+
+test('everything read: no receipts sent', async () => {
+  const t = thread('$root', evt('$reply'));
+  const { mx, calls } = setup({
+    timeline: [evt('a'), evt('b')],
+    readUpTo: 'b',
+    threads: [t],
+    threadUnread: { $root: 0 }, // thread read too
+  });
+  await markAsRead(mx, '!r:server', false);
+  assert.equal(calls.length, 0);
+});
+
+test('sending thread reply is skipped', async () => {
+  const t = thread('$root', evt('$reply', true)); // isSending → skip
+  const { mx, calls } = setup({
+    timeline: [evt('a'), evt('b')],
+    readUpTo: 'b',
+    threads: [t],
+    threadUnread: { $root: 1 },
+  });
+  await markAsRead(mx, '!r:server', false);
+  assert.equal(calls.length, 0);
+});
+
+test('private receipt flag uses ReadPrivate', async () => {
+  const { mx, calls } = setup({ timeline: [evt('a'), evt('b')], readUpTo: 'a' });
+  await markAsRead(mx, '!r:server', true);
+  assert.equal(calls[0].receiptType, ReceiptType.ReadPrivate);
+});

src/app/utils/notifications.ts

@@ -1,4 +1,4 @@
-import { MatrixClient, ReceiptType } from 'matrix-js-sdk';
+import { MatrixClient, NotificationCountType, ReceiptType } from 'matrix-js-sdk';
 import { getSettings } from '../state/settings';
 
 export async function markAsRead(mx: MatrixClient, roomId: string, privateReceipt: boolean) {
@@ -6,6 +6,9 @@ export async function markAsRead(mx: MatrixClient, roomId: string, privateReceip
   const room = mx.getRoom(roomId);
   if (!room) return;
 
+  const receiptType =
+    privateReceipt || privateReadReceipts ? ReceiptType.ReadPrivate : ReceiptType.Read;
+
   const timeline = room.getLiveTimeline().getEvents();
   const readEventId = room.getEventReadUpTo(mx.getUserId()!);
 
@@ -17,17 +20,39 @@ export async function markAsRead(mx: MatrixClient, roomId: string, privateReceip
     }
     return null;
   };
-  if (timeline.length === 0) return;
-  const latestEvent = getLatestValidEvent();
-  if (latestEvent === null) return;
 
-  // Unthreaded receipt: with client threadSupport enabled the SDK would
-  // otherwise scope this to the main timeline (thread_id: "main"), leaving
-  // per-thread notification counts permanently unread. Unthreaded preserves
-  // the pre-threads wire behavior — one receipt clears everything.
-  await mx.sendReadReceipt(
-    latestEvent,
-    privateReceipt || privateReadReceipts ? ReceiptType.ReadPrivate : ReceiptType.Read,
-    true,
+  const latestEvent = timeline.length > 0 ? getLatestValidEvent() : null;
+  if (latestEvent) {
+    // Unthreaded receipt: with client threadSupport enabled the SDK would
+    // otherwise scope this to the main timeline (thread_id: "main"). Unthreaded
+    // clears the main timeline + every event up to this one.
+    await mx.sendReadReceipt(latestEvent, receiptType, true);
+  }
+
+  // Clear per-thread notification counts too — the room's unread dot sums them,
+  // so an unread thread reply keeps the dot lit even after the main timeline is
+  // read (threadSupport moves thread replies out of the main timeline, so the
+  // unthreaded receipt above doesn't necessarily cover them).
+  //
+  // CRITICAL: only send for a GENUINE loaded thread reply, via thread.lastReply().
+  // NEVER fall back to the thread root: a root event is "in the main timeline",
+  // so sendReadReceipt(root, false) resolves (via threadIdForReceipt) to a MAIN
+  // receipt at that old root event. If the root isn't in the loaded timeline it
+  // moves the main read receipt onto an event we don't have -> getEventReadUpTo()
+  // returns null -> the room is reported unread on every mark-read call (this was
+  // the P6 regression, amplified by the bulk mark-all-orphan-rooms-read callers).
+  // If a thread's replies aren't loaded (lastReply() null), just skip it.
+  const threads = room.getThreads();
+  await Promise.all(
+    threads.map((thread) => {
+      const unread =
+        room.getThreadUnreadNotificationCount(thread.id, NotificationCountType.Total) ?? 0;
+      if (unread <= 0) return undefined;
+      const lastReply = thread.lastReply();
+      if (!lastReply || lastReply.isSending()) return undefined;
+      // Threaded receipt (unthreaded = false → the SDK scopes it to this thread
+      // via the reply's real threadRootId; it never touches the main marker).
+      return mx.sendReadReceipt(lastReply, receiptType, false).catch(() => undefined);
+    }),
   );
 }

src/app/utils/retention.test.ts

@@ -0,0 +1,42 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { isExpired, RETENTION_PRESETS, RETENTION_MIN_MS } from './retention';
+
+// MSC1763 retention: `isExpired` decides whether a message is past the room's
+// retention window. It must be strict (> window, not >=) and a disabled policy
+// (0) must never expire anything.
+
+const HOUR = 60 * 60 * 1000;
+
+test('isExpired: an event older than the window is expired', () => {
+  const now = 10 * HOUR;
+  assert.equal(isExpired(now - 2 * HOUR, HOUR, now), true);
+});
+
+test('isExpired: an event within the window is NOT expired', () => {
+  const now = 10 * HOUR;
+  assert.equal(isExpired(now - HOUR / 2, HOUR, now), false);
+});
+
+test('isExpired: exactly at the boundary is NOT expired (strict >)', () => {
+  const now = 10 * HOUR;
+  assert.equal(isExpired(now - HOUR, HOUR, now), false);
+});
+
+test('isExpired: a disabled policy (0 / negative) never expires', () => {
+  const now = 10 * HOUR;
+  assert.equal(isExpired(now - 100 * HOUR, 0, now), false);
+  assert.equal(isExpired(0, -1, now), false);
+});
+
+test('presets: Off is 0 and the rest are strictly increasing, all >= the floor', () => {
+  assert.equal(RETENTION_PRESETS[0].ms, 0);
+  const nonZero = RETENTION_PRESETS.slice(1).map((p) => p.ms);
+  for (let i = 1; i < nonZero.length; i += 1) {
+    assert.ok(nonZero[i] > nonZero[i - 1], 'presets increase');
+  }
+  assert.ok(
+    nonZero.every((ms) => ms >= RETENTION_MIN_MS),
+    'all presets above the floor',
+  );
+});

src/app/utils/retention.ts

@@ -0,0 +1,32 @@
+import { Room } from 'matrix-js-sdk';
+import { StateEvent } from '../../types/matrix/room';
+
+// MSC1763 — per-room message retention (`m.room.retention`). `max_lifetime` is a
+// duration in milliseconds after which a message is considered expired.
+export type RetentionContent = {
+  max_lifetime?: number;
+};
+
+const DAY_MS = 24 * 60 * 60 * 1000;
+
+// Floor to avoid foot-guns (an admin fat-fingering a tiny value nuking a room).
+export const RETENTION_MIN_MS = 10 * 60 * 1000;
+
+export type RetentionPreset = { label: string; ms: number };
+export const RETENTION_PRESETS: RetentionPreset[] = [
+  { label: 'Off', ms: 0 },
+  { label: '1 Day', ms: DAY_MS },
+  { label: '1 Week', ms: 7 * DAY_MS },
+  { label: '1 Month', ms: 30 * DAY_MS },
+];
+
+/** The room's active retention window in ms, or `undefined` when unset/disabled. */
+export const getRoomRetentionMs = (room: Room): number | undefined => {
+  const event = room.currentState.getStateEvents(StateEvent.RoomRetention, '');
+  const ms = event?.getContent<RetentionContent>()?.max_lifetime;
+  return typeof ms === 'number' && ms > 0 ? ms : undefined;
+};
+
+/** True when an event at `tsMs` has passed the `maxLifetimeMs` retention window. */
+export const isExpired = (tsMs: number, maxLifetimeMs: number, nowMs: number): boolean =>
+  maxLifetimeMs > 0 && nowMs - tsMs > maxLifetimeMs;

src/app/utils/room.ts

@@ -269,7 +269,15 @@ export const getUnreadInfos = (
 
     if (roomHaveNotification(room) || roomHaveUnread(mx, room)) {
       const mutedThreads = content ? getMutedThreads(content, room.roomId) : undefined;
-      unread.push(getUnreadInfo(room, mutedThreads));
+      const info = getUnreadInfo(room, mutedThreads);
+      // Skip a phantom {0,0} entry: a room whose ONLY unread is a muted thread has
+      // roomHaveNotification true (the server room total includes the muted
+      // thread's count), but getUnreadInfo subtracts it back to zero. Pushing it
+      // would still light the nav row + pollute "unread only" filters. Keep it
+      // only if there's real unread (count > 0) or a genuine unread marker.
+      if (info.total > 0 || info.highlight > 0 || roomHaveUnread(mx, room)) {
+        unread.push(info);
+      }
     }
 
     return unread;

src/app/utils/scheduledMessages.ts

@@ -12,6 +12,8 @@ export async function scheduleMessage(
   content: IContent,
   sendAtMs: number,
 ): Promise<string> {
+  // A past/near target floors at 1000ms (send ~immediately) — an intentional,
+  // tested contract; the ScheduleMessageModal already guards ≥60s in the future.
   const delayMs = Math.max(1000, Math.round(sendAtMs - Date.now()));
   const txnId = `sched_${Date.now()}_${Math.random().toString(36).slice(2)}`;
   const path = `/rooms/${encodeURIComponent(roomId)}/send/m.room.message/${txnId}`;

src/app/utils/searchCache.ts

@@ -298,9 +298,23 @@ export const deleteSearchCacheDatabase = async (): Promise<void> => {
         return;
       }
       const req = indexedDB.deleteDatabase(DB_NAME);
-      req.onsuccess = () => resolve();
-      req.onerror = () => resolve();
-      req.onblocked = () => resolve();
+      let settled = false;
+      const done = () => {
+        if (!settled) {
+          settled = true;
+          resolve();
+        }
+      };
+      req.onsuccess = done;
+      req.onerror = done;
+      req.onblocked = () => {
+        // Another tab still holds the DB open, so the delete is QUEUED, not done —
+        // resolving now would report a wipe that hasn't happened (plaintext still
+        // on disk). Wait for the real onsuccess (fires once the other tab closes;
+        // cross-tab logout reloads it shortly), but cap the wait so logout can't
+        // hang forever if a tab never releases.
+        setTimeout(done, 3000);
+      };
     } catch {
       resolve();
     }

src/client/initMatrix.ts

@@ -38,7 +38,8 @@ export const initClient = async (session: Session): Promise<MatrixClient> => {
     deviceId: session.deviceId,
     timelineSupport: true,
     cryptoCallbacks: cryptoCallbacks as any,
-    verificationMethods: ['m.sas.v1'],
+    // SAS (emoji) + QR-code verification (show/scan/reciprocate).
+    verificationMethods: ['m.sas.v1', 'm.qr_code.show.v1', 'm.qr_code.scan.v1', 'm.reciprocate.v1'],
     tokenRefreshFunction: oidcRefresher
       ? (refreshToken) => oidcRefresher.doRefreshAccessToken(refreshToken)
       : undefined,

src/types/matrix/accountData.ts

@@ -2,6 +2,8 @@ export enum AccountDataEvent {
   PushRules = 'm.push_rules',
   Direct = 'm.direct',
   IgnoredUserList = 'm.ignored_user_list',
+  // [MSC2867] Per-room "mark as unread" flag (room account data).
+  MarkedUnread = 'm.marked_unread',
 
   CinnySpaces = 'in.cinny.spaces',
 

src/types/matrix/room.ts

@@ -29,6 +29,8 @@ export enum StateEvent {
   RoomPinnedEvents = 'm.room.pinned_events',
   RoomEncryption = 'm.room.encryption',
   RoomHistoryVisibility = 'm.room.history_visibility',
+  // [MSC1763] Per-room message retention policy (disappearing messages).
+  RoomRetention = 'm.room.retention',
   RoomGuestAccess = 'm.room.guest_access',
   RoomServerAcl = 'm.room.server_acl',
   RoomTombstone = 'm.room.tombstone',