fix(settings): serialize lock-store writes and drop a deleted playlist's locks

- Lock-store mutations run through one write queue: each rewrites the
  whole persisted store, so overlapping edits could otherwise snapshot
  the same store and the later write would drop the earlier edit.
- Deleting a playlist removes its locks through the PLAYLIST_DELETE_CLEANUP
  hook; "Remove all playlists" clears the lock store once the deletion
  has succeeded.

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

apps/web/src/app/app.config.ts

@@ -33,7 +33,10 @@ import {
 } from '@iptvnator/portal/shared/util';
 import { STALKER_PLAYLIST_CONNECTION_EDITOR } from '@iptvnator/playlist/shared/ui';
 import { provideXtreamDataSource } from '@iptvnator/portal/xtream/data-access';
-import { DataService } from '@iptvnator/services';
+import {
+    provideParentalLockPlaylistCleanup,
+    DataService,
+} from '@iptvnator/services';
 import { dbConfig } from '@iptvnator/shared/interfaces';
 import { AppConfig } from '../environments/environment';
 import { routes } from './app.routes';
@@ -162,6 +165,7 @@ export const appConfig: ApplicationConfig = {
         },
         ...provideWorkspaceShellActions(),
         ...provideParentalLockPrompt(),
+        provideParentalLockPlaylistCleanup(),
         ...provideXtreamDataSource(),
         {
             provide: MAT_FORM_FIELD_DEFAULT_OPTIONS,

apps/web/src/app/settings/settings-playlist-reset.facade.spec.ts

@@ -6,7 +6,11 @@ import {
     selectAllPlaylistsMeta,
     selectIsEpgAvailable,
 } from '@iptvnator/m3u-state';
-import { DatabaseService, PlaylistsService } from '@iptvnator/services';
+import {
+    ParentalLockService,
+    DatabaseService,
+    PlaylistsService,
+} from '@iptvnator/services';
 import { PlaylistMeta } from '@iptvnator/shared/interfaces';
 import { Store } from '@ngrx/store';
 import { MockStore, provideMockStore } from '@ngrx/store/testing';
@@ -59,6 +63,9 @@ describe('SettingsPlaylistResetFacade', () => {
                 MockProvider(PlaylistsService, {
                     removeAll: jest.fn().mockReturnValue(of(undefined)),
                 }),
+                MockProvider(ParentalLockService, {
+                    clearAllLocks: jest.fn().mockResolvedValue(true),
+                }),
                 provideMockStore({
                     selectors: [
                         { selector: selectAllPlaylistsMeta, value: [] },
@@ -218,6 +225,9 @@ describe('SettingsPlaylistResetFacade', () => {
 
         expect(playlistsService.removeAll).toHaveBeenCalled();
         expect(databaseService.deleteAllPlaylists).not.toHaveBeenCalled();
+        expect(
+            TestBed.inject(ParentalLockService).clearAllLocks
+        ).toHaveBeenCalled();
         expect(dispatchSpy).toHaveBeenCalledWith(
             PlaylistActions.removeAllPlaylists()
         );
@@ -235,6 +245,10 @@ describe('SettingsPlaylistResetFacade', () => {
         await new Promise<void>((resolve) => setTimeout(resolve, 0));
 
         expect(facade.isRemovingAllPlaylists()).toBe(false);
+        // Nothing was deleted, so the locks stay.
+        expect(
+            TestBed.inject(ParentalLockService).clearAllLocks
+        ).not.toHaveBeenCalled();
         expect(snackBar.open).toHaveBeenCalledWith(
             'SETTINGS.PLAYLISTS_REMOVE_FAILED',
             undefined,

apps/web/src/app/settings/settings-playlist-reset.facade.ts

@@ -5,6 +5,7 @@ import { TranslateService } from '@ngx-translate/core';
 import { firstValueFrom, take } from 'rxjs';
 import { PlaylistActions, selectAllPlaylistsMeta } from '@iptvnator/m3u-state';
 import {
+    ParentalLockService,
     DatabaseService,
     DbOperationEvent,
     PlaylistsService,
@@ -24,6 +25,7 @@ import { SettingsSnackbarService } from './settings-snackbar.service';
 @Injectable()
 export class SettingsPlaylistResetFacade {
     private readonly databaseService = inject(DatabaseService);
+    private readonly parentalLock = inject(ParentalLockService);
     private readonly matDialog = inject(MatDialog);
     private readonly playlistsService = inject(PlaylistsService);
     private readonly runtime = inject(RuntimeCapabilitiesService);
@@ -107,6 +109,12 @@ export class SettingsPlaylistResetFacade {
             if (!deleted) {
                 throw new Error('Delete all playlists returned success=false');
             }
+            // The playlists are gone; their locks must not linger in the
+            // lock store (the deletion itself already succeeded, so a failed
+            // clear is only logged).
+            if (!(await this.parentalLock.clearAllLocks())) {
+                console.warn('Clearing the parental locks failed.');
+            }
 
             this.store.dispatch(PlaylistActions.removeAllPlaylists());
             this.settingsSnackbar.open(