fix(settings): build bulk lock drafts only from a readable lock store

The Xtream and M3U management dialogs offer lock toggles, and the
Stalker lock dialog opens, only once the lock store has been read. A
draft built from the empty fail-closed snapshot would otherwise replace
the real locks with nothing on Save if storage recovered in between.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/ui/components/src/lib/channel-list-container/groups-view/groups-view.component.spec.ts

@@ -47,7 +47,11 @@ describe('GroupsViewComponent', () => {
     let fixture: ComponentFixture<GroupsViewComponent>;
     let component: GroupsViewComponent;
     let dialog: { open: jest.Mock };
-    let parentalLock: { requestUnlock: jest.Mock };
+    let parentalLock: {
+        requestUnlock: jest.Mock;
+        ensureLocksReadable: jest.Mock;
+        lockedGroupTitles: jest.Mock;
+    };
 
     const sportsCenter = createChannel(
         'sports-1',
@@ -104,7 +108,11 @@ describe('GroupsViewComponent', () => {
     beforeEach(async () => {
         localStorage.removeItem(GROUP_CHANNEL_SORT_STORAGE_KEY);
 
-        parentalLock = { requestUnlock: jest.fn().mockResolvedValue(true) };
+        parentalLock = {
+            requestUnlock: jest.fn().mockResolvedValue(true),
+            ensureLocksReadable: jest.fn().mockResolvedValue(true),
+            lockedGroupTitles: jest.fn(() => ['News']),
+        };
 
         dialog = {
             open: jest.fn(),
@@ -537,6 +545,19 @@ describe('GroupsViewComponent', () => {
         ]);
     });
 
+    it('opens the manage-groups dialog without lock toggles while the lock store is unreadable', async () => {
+        fixture.componentRef.setInput('playlistId', 'playlist-a');
+        fixture.componentRef.setInput('lockedGroupTitles', []);
+        fixture.detectChanges();
+        parentalLock.ensureLocksReadable.mockResolvedValue(false);
+        dialog.open.mockReturnValue({ afterClosed: () => of(undefined) });
+
+        await component.openGroupManagement();
+
+        const data = dialog.open.mock.calls[0][1].data;
+        expect(data.lockedGroupTitles).toBeUndefined();
+    });
+
     it('drops the manage-groups result once another playlist is open', async () => {
         const hiddenGroupTitlesChanged = jest.fn();
         const lockedGroupTitlesChanged = jest.fn();

libs/ui/components/src/lib/channel-list-container/groups-view/groups-view.component.ts

@@ -556,7 +556,17 @@ export class GroupsViewComponent {
                     count,
                 })
             );
-        const lockedGroupTitles = this.lockedGroupTitles();
+        // Lock toggles only from a lock store that was read: a draft built
+        // from the empty fail-closed snapshot would, if storage recovered by
+        // Save, replace the real locks with nothing. Hidden groups stay
+        // editable either way.
+        const lockedGroupTitles =
+            this.lockedGroupTitles() !== null &&
+            playlistId &&
+            (await this.parentalLock.ensureLocksReadable()) &&
+            this.playlistId() === playlistId
+                ? this.parentalLock.lockedGroupTitles(playlistId)
+                : null;
         const dialogRef = this.dialog.open(GroupManagementDialogComponent, {
             data: {
                 groups,