fix(security): a dismissed status announcement no longer hides the security nudge (#307)

SecurityBanner asked pickBanner whether another strip would show without
the dismissed set, so a dismissed Kuma announcement (often pinned for
weeks) still counted and suppressed the verify / backup nudge on every
device that had dismissed it. The dismissed set is now a shared jotai
atom (still persisted to localStorage) used by both banners. Adds a
Playwright regression.

Fixes #307

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

src/app/features/security-nudge/SecurityBanner.tsx

@@ -14,7 +14,7 @@ import { useKeyBackupInfo, useKeyBackupStatusChange } from '../../hooks/useKeyBa
 import { useAlive } from '../../hooks/useAlive';
 import { useSyncState } from '../../hooks/useSyncState';
 import { settingsRequestAtom } from '../../state/settingsRequest';
-import { serverStatusAtom } from '../../state/serverStatus';
+import { serverStatusAtom, statusDismissedAtom } from '../../state/serverStatus';
 import { pickBanner } from '../../utils/kumaStatus';
 import {
   dismissNudge,
@@ -66,6 +66,7 @@ function SecurityBannerFor({ crypto }: { crypto: CryptoApi }) {
   const backupInfo = useKeyBackupInfo(crypto);
   const backupActive = useBackupActive(crypto);
   const { status: serverStatus, syncLost } = useAtomValue(serverStatusAtom);
+  const statusDismissed = useAtomValue(statusDismissedAtom);
   const requestSettings = useSetAtom(settingsRequestAtom);
   // Not urgent: wait until sync has settled (two SYNCING in a row), so it
   // never stacks under the "Connecting…" strip at startup.
@@ -91,7 +92,11 @@ function SecurityBannerFor({ crypto }: { crypto: CryptoApi }) {
   });
 
   // One strip at a time: outages, maintenance and a lost connection win.
-  const otherStrip = syncLost || !!pickBanner(serverStatus, { syncLost, where: 'client' });
+  // [Gitea #307] Pass what the user dismissed: a dismissed announcement isn't
+  // on screen and must not keep the nudge hidden for as long as it's posted.
+  const otherStrip =
+    syncLost ||
+    !!pickBanner(serverStatus, { syncLost, where: 'client', dismissed: new Set(statusDismissed) });
   if (!settled || !deviceId || !kind || otherStrip || !shouldShowNudge(kind, record, Date.now()))
     return null;