fix(logout): no draft or search opt-in left behind after logout (#319, #296)

- #319: logout wiped the drafts, then reloaded, and the reload's pagehide
  made RoomInput flush the open composer's (decrypted) draft straight back
  to localStorage. clearPlaintextCaches now sets a module flag and
  persistDraft stops writing once it's set (resets with the new page).
- #296: the device-wide encrypted-search opt-in (searchCacheEnabled)
  survived logout, so the next account started indexing decrypted text
  without opting in. It's now cleared, along with the SDK's per-user
  filter key.

Verified headless with a throwaway account (search opt-in on, "SECRET
half-typed reply" in the composer, Settings → Log out): before, the draft
and searchCacheEnabled=true remained; now neither does. Unit test added.

Fixes #319
Fixes #296

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

src/app/features/lotus/backgrounds/animAurora.ts

@@ -51,7 +51,7 @@ const dark: CSSProperties = {
   backgroundSize: '260% 240%, 300% 260%, 240% 280%, 220% 200%, 100% 100%, 100% 100%',
   backgroundPosition: '0% 30%, 100% 70%, 50% 0%, 20% 80%, 50% 50%, 50% 50%',
   backgroundRepeat: 'no-repeat',
-  animation: `${auroraFlow} 60s ease-in-out infinite`,
+  animation: `${auroraFlow} 60s steps(180) infinite`,
 };
 
 const light: CSSProperties = {
@@ -75,7 +75,7 @@ const light: CSSProperties = {
   backgroundSize: '260% 240%, 300% 260%, 240% 280%, 220% 200%, 100% 100%, 100% 100%',
   backgroundPosition: '0% 30%, 100% 70%, 50% 0%, 20% 80%, 50% 50%, 50% 50%',
   backgroundRepeat: 'no-repeat',
-  animation: `${auroraFlow} 60s ease-in-out infinite`,
+  animation: `${auroraFlow} 60s steps(180) infinite`,
 };
 
 export const animAurora: ChatBgVariants = { dark, light };

src/app/features/lotus/backgrounds/animFireflies.ts

@@ -55,7 +55,7 @@ export const animFireflies: ChatBgVariants = {
       '0 0', // wash A   (static)
       '0 0', // wash B   (static)
     ].join(','),
-    animation: `${firefliesDrift} 44s linear infinite`,
+    animation: `${firefliesDrift} 44s steps(528) infinite`,
   },
 
   // Light: a cozy warm dim-dusk. No harsh dots on white — soft amber motes with
@@ -93,6 +93,6 @@ export const animFireflies: ChatBgVariants = {
       '0 0', // wash A   (static)
       '0 0', // wash B   (static)
     ].join(','),
-    animation: `${firefliesDrift} 44s linear infinite`,
+    animation: `${firefliesDrift} 44s steps(528) infinite`,
   },
 };

src/app/features/lotus/backgrounds/animPulse.ts

@@ -76,7 +76,7 @@ export const animPulse: ChatBgVariants = {
       '0 0', // base wash
       '0 0', // vignette
     ].join(','),
-    animation: `${gridPulse} 22s ease-in-out infinite`,
+    animation: `${gridPulse} 22s steps(528) infinite`,
   },
 
   // Light: soft slate-blue grid on pale cool-white, a gentle luminance breathe.
@@ -116,6 +116,6 @@ export const animPulse: ChatBgVariants = {
       '0 0', // base wash
       '0 0', // vignette
     ].join(','),
-    animation: `${gridPulse} 22s ease-in-out infinite`,
+    animation: `${gridPulse} 22s steps(528) infinite`,
   },
 };

src/app/features/lotus/backgrounds/animRain.ts

@@ -97,7 +97,7 @@ export const animRain: ChatBgVariants = {
     ].join(','),
     backgroundSize: ['260px 200px', '100% 100%', '100% 100%', '100% 100%'].join(','),
     backgroundPosition: ['0 0', '0 0', '0 0', '0 0'].join(','),
-    animation: `${rainFall} 12s linear infinite`,
+    animation: `${rainFall} 12s steps(288) infinite`,
   },
 
   // Light: soft teal-grey streaks on a pale cool base — elegant, never neon.
@@ -118,6 +118,6 @@ export const animRain: ChatBgVariants = {
     ].join(','),
     backgroundSize: ['260px 200px', '100% 100%', '100% 100%', '100% 100%'].join(','),
     backgroundPosition: ['0 0', '0 0', '0 0', '0 0'].join(','),
-    animation: `${rainFall} 12s linear infinite`,
+    animation: `${rainFall} 12s steps(288) infinite`,
   },
 };

src/app/features/lotus/backgrounds/animStars.ts

@@ -68,7 +68,7 @@ export const animStars: ChatBgVariants = {
       '0 0', // nebula A
       '0 0', // nebula B
     ].join(','),
-    animation: `${starDrift} 90s linear infinite`,
+    animation: `${starDrift} 90s steps(1080) infinite`,
   },
 
   // Light: an airy pre-dawn sky. No literal white-on-white stars — instead very
@@ -112,6 +112,6 @@ export const animStars: ChatBgVariants = {
       '0 0', // wash A
       '0 0', // wash B
     ].join(','),
-    animation: `${starDrift} 100s linear infinite`,
+    animation: `${starDrift} 100s steps(1200) infinite`,
   },
 };

src/app/features/lotus/chatBackground.ts

@@ -149,6 +149,11 @@ export const getChatBg = (
   }
   // For animated backgrounds, promote the element to its own compositor layer so
   // background-position keyframes don't trigger repaints on descendant elements.
+  // [Gitea #337] background-position can't run on the compositor, so every
+  // animation frame repaints the whole chat area (45 to 70% main-thread busy
+  // at 60 fps). The drifts are slow (3–22 px/s), so each animation uses steps():
+  // ~12 updates/s for the slow ones, ~24/s for rain and pulse: visually the
+  // same, a fraction of the repaints.
   if (style.animation) {
     return { ...style, willChange: 'background-position', contain: 'paint' };
   }

src/app/features/room/RoomInput.tsx

@@ -160,6 +160,7 @@ import { scheduledMessagesAtom } from '../../state/scheduledMessages';
 import { createErrorToast, toastQueueAtom } from '../../state/toast';
 import { getThreadDraftKey } from '../../state/room/thread';
 import { stripTrackingParamsInHtml, stripTrackingParamsInText } from '../../utils/urlTracking';
+import { plaintextCachesWiped } from '../../state/plaintextCaches';
 
 const GifPicker = React.lazy(() =>
   import('../../components/GifPicker').then((m) => ({ default: m.GifPicker })),
@@ -562,6 +563,8 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
     // Persist the current editor state to the draft atom + localStorage; an empty
     // editor clears both so the draft indicators never claim a draft that isn't there.
     const persistDraft = useCallback(() => {
+      // [Gitea #319] Logout already wiped the drafts; don't write this one back.
+      if (plaintextCachesWiped()) return;
       if (!isEmptyEditor(editor)) {
         const parsedDraft = JSON.parse(JSON.stringify(editor.children));
         setMsgDraft(parsedDraft);

src/app/state/plaintextCaches.test.ts

@@ -26,7 +26,7 @@ const api = {
       : Object.getOwnPropertyDescriptor(target, key),
 });
 
-const { clearPlaintextCaches } = await import('./plaintextCaches');
+const { clearPlaintextCaches, plaintextCachesWiped } = await import('./plaintextCaches');
 
 test('clearPlaintextCaches removes every plaintext/PII localStorage key', () => {
   store.clear();
@@ -94,3 +94,13 @@ test('clearPlaintextCaches removes the call-volume list and the settings-sync st
   assert.equal(store.has('settings-sync-meta:@me:server'), false);
   assert.equal(store.has('settings'), true, 'device preferences are kept');
 });
+
+test('clearPlaintextCaches clears the encrypted-search opt-in and flags the wipe (#296, #319)', () => {
+  store.clear();
+  store.set('searchCacheEnabled', 'true');
+  store.set('mxjssdk_memory_filter_FILTER_SYNC_@me:server', '0');
+  clearPlaintextCaches('@me:server');
+  assert.equal(store.has('searchCacheEnabled'), false);
+  assert.equal(store.has('mxjssdk_memory_filter_FILTER_SYNC_@me:server'), false);
+  assert.equal(plaintextCachesWiped(), true, 'draft writes stop until the page reloads');
+});

src/app/state/plaintextCaches.ts

@@ -112,7 +112,34 @@ const clearCallVolumesAndSyncMeta = (userId?: string): void => {
   });
 };
 
+// [Gitea #319] Set once a logout has wiped the caches. Logout then reloads the
+// page, and the reload's `pagehide` made RoomInput flush the open composer's
+// draft straight back to localStorage; draft writes check this and stop.
+// Module state, so it resets with the new page.
+let wiped = false;
+export const plaintextCachesWiped = (): boolean => wiped;
+
+/**
+ * [Gitea #296] Device-wide flags/keys that carry the previous account's choice
+ * or id: the encrypted-search opt-in (the next account would otherwise start
+ * indexing decrypted text without opting in) and the SDK's per-user filter key.
+ */
+const clearAccountScopedFlags = (userId?: string): void => {
+  const keys = [
+    'searchCacheEnabled',
+    ...(userId ? [`mxjssdk_memory_filter_FILTER_SYNC_${userId}`] : []),
+  ];
+  keys.forEach((key) => {
+    try {
+      localStorage.removeItem(key);
+    } catch {
+      // best-effort
+    }
+  });
+};
+
 export const clearPlaintextCaches = (userId?: string): void => {
+  wiped = true;
   clearTranslationCache();
   clearScheduledMessages();
   clearRecentSearches();
@@ -124,5 +151,6 @@ export const clearPlaintextCaches = (userId?: string): void => {
   clearCallSession();
   clearStatusMessage();
   clearCallVolumesAndSyncMeta(userId);
+  clearAccountScopedFlags(userId);
   if (userId) clearNavToActivePathStore(userId);
 };