diff --git a/src/test/scenarios/urlRemigrationKeyRewrite.scenario.test.ts b/src/test/scenarios/urlRemigrationKeyRewrite.scenario.test.ts
new file mode 100644
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+++ b/src/test/scenarios/urlRemigrationKeyRewrite.scenario.test.ts
@@ -0,0 +1,80 @@
+import { beforeEach, describe, expect, it } from 'vitest';
+import { rewriteFrontendStoreKeysForRemap } from '@/utils/server/rewriteFrontendStoreKeys';
+import { useOfflineStore, type OfflineAlbumMeta } from '@/features/offline/store/offlineStore';
+import { useLocalPlaybackStore } from '@/store/localPlaybackStore';
+import { usePlayerStore } from '@/features/playback/store/playerStore';
+import { resetAllStores } from '@/test/helpers/storeReset';
+
+// Scenario: URL-change remigration × front-end store-key rewrite. After a server URL
+// edit re-tags the SQLite/disk keys, the in-memory zustand stores must repoint their
+// old index key to the new one — offline album keys, local-playback entries, and the
+// player queue's serverId (+ per-item refs). Unrelated keys must be left untouched.
+
+const album = (id: string, serverId: string): OfflineAlbumMeta => ({
+  id,
+  serverId,
+  name: id,
+  artist: 'A',
+  trackIds: [],
+});
+
+beforeEach(() => {
+  resetAllStores();
+  useOfflineStore.setState({ albums: {} });
+  useLocalPlaybackStore.setState({ entries: {} });
+});
+
+function seedEntry(serverIndexKey: string, trackId: string): void {
+  useLocalPlaybackStore.getState().upsertEntry({
+    serverIndexKey,
+    trackId,
+    localPath: `/disk/${trackId}.opus`,
+    layoutFingerprint: 'fp',
+    sizeBytes: 1,
+    suffix: 'opus',
+    tier: 'library',
+  });
+}
+
+describe('URL remigration × store-key rewrite', () => {
+  it('repoints old→new across offline albums, local playback, and the player queue; leaves others', async () => {
+    useOfflineStore.setState({
+      albums: { 'old:alb1': album('alb1', 'old'), 'keep:alb2': album('alb2', 'keep') },
+    });
+    seedEntry('old', 't1');
+    seedEntry('keep', 't2');
+    usePlayerStore.setState({
+      queueServerId: 'old',
+      queueItems: [
+        { serverId: 'old', trackId: 't1' },
+        { serverId: 'keep', trackId: 't2' },
+      ],
+    });
+
+    await rewriteFrontendStoreKeysForRemap([{ oldKey: 'old', newKey: 'new' }]);
+
+    // Offline albums: old key repointed (serverId updated), unrelated key untouched.
+    const albums = useOfflineStore.getState().albums;
+    expect(albums['new:alb1']?.serverId).toBe('new');
+    expect(albums['old:alb1']).toBeUndefined();
+    expect(albums['keep:alb2']?.serverId).toBe('keep');
+
+    // Local playback: entry repointed to the new index key, unrelated entry untouched.
+    const lp = useLocalPlaybackStore.getState();
+    expect(lp.getEntry('t1', 'new')?.serverIndexKey).toBe('new');
+    expect(lp.getEntry('t1', 'old')).toBeNull();
+    expect(lp.getEntry('t2', 'keep')?.serverIndexKey).toBe('keep');
+
+    // Player queue: bound server + per-item ref repointed; the unrelated ref stays.
+    const player = usePlayerStore.getState();
+    expect(player.queueServerId).toBe('new');
+    expect(player.queueItems.find(r => r.trackId === 't1')?.serverId).toBe('new');
+    expect(player.queueItems.find(r => r.trackId === 't2')?.serverId).toBe('keep');
+  });
+
+  it('is a no-op when old and new keys are equal', async () => {
+    useOfflineStore.setState({ albums: { 'same:alb1': album('alb1', 'same') } });
+    await rewriteFrontendStoreKeysForRemap([{ oldKey: 'same', newKey: 'same' }]);
+    expect(useOfflineStore.getState().albums['same:alb1']?.serverId).toBe('same');
+  });
+});