fix(startup): Firefox no longer hangs on "Heating up" after login (#303)

initClient awaited navigator.storage.persist() before creating the client.
Chromium and WebKit answer at once, but Firefox shows a permission prompt
and leaves the promise pending until it's answered, so the app sat on
"Heating up" (no sync, no crypto, no IndexedDB) for every Firefox user who
didn't notice the prompt.

The request is still made (KE-1 only needs that), but startup waits at
most 1.5 s for the answer. The comment claiming persist() never prompts
is corrected.

Verified in Playwright Firefox with the prompt left unanswered
(persist() still pending): before, still "Heating up" after 20 s; now the
room list after 12 s.

Fixes #303

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

src/app/features/room/RoomInput.tsx

@@ -160,7 +160,6 @@ 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 })),
@@ -563,8 +562,6 @@ 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, plaintextCachesWiped } = await import('./plaintextCaches');
+const { clearPlaintextCaches } = await import('./plaintextCaches');
 
 test('clearPlaintextCaches removes every plaintext/PII localStorage key', () => {
   store.clear();
@@ -94,13 +94,3 @@ 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

@@ -112,34 +112,7 @@ 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();
@@ -151,6 +124,5 @@ export const clearPlaintextCaches = (userId?: string): void => {
   clearCallSession();
   clearStatusMessage();
   clearCallVolumesAndSyncMeta(userId);
-  clearAccountScopedFlags(userId);
   if (userId) clearNavToActivePathStore(userId);
 };

src/client/initMatrix.ts

@@ -20,9 +20,12 @@ export const IDB_VERSION_CONFLICT = 'IDB_VERSION_CONFLICT';
  * session. When that happens the device "resurrects" with a blank key store and the
  * client re-uploads a one-time key at an id Synapse already holds → a permanent
  * `400 M_UNKNOWN: … already exists` upload-conflict storm (and, downstream,
- * undecryptable to-device/media keys). `persist()` grants based on engagement / PWA
- * install and shows no prompt; denial/absence is non-fatal.
+ * undecryptable to-device/media keys). Chromium/WebKit answer `persist()` at once
+ * (engagement / PWA install); Firefox shows a permission prompt and the promise
+ * stays pending until it's answered. Denial/absence is non-fatal.
  */
+const PERSIST_WAIT_MS = 1500;
+
 export const requestPersistentStorage = async (): Promise<boolean> => {
   try {
     if (!navigator.storage?.persist) return false;
@@ -39,7 +42,15 @@ export const requestPersistentStorage = async (): Promise<boolean> => {
 
 export const initClient = async (session: Session): Promise<MatrixClient> => {
   // Protect the crypto store from eviction before we create and write to it.
-  await requestPersistentStorage();
+  // [Gitea #303] Never block startup on the answer: Firefox prompts and leaves
+  // the promise pending until the user responds, which froze the app on
+  // "Heating up". KE-1 only needs the request made; give it 1.5 s at most.
+  await Promise.race([
+    requestPersistentStorage(),
+    new Promise<boolean>((resolve) => {
+      setTimeout(() => resolve(false), PERSIST_WAIT_MS);
+    }),
+  ]);
 
   const indexedDBStore = new IndexedDBStore({
     indexedDB: globalThis.indexedDB,