Merge master, dedupe the kept copy, and retire superseded switches

Master had moved ten commits ahead. Two conflicts, both resolved without
losing either side: the `XTREAM_PROBE_URL` handler this PR extracted into
`events/stream-probe.ts` stays extracted (master added performance capture
nearby but never touched that handler), and the mock-server scenario table
takes the union of master's `performance` row and this branch's `multisrc`
pair.

Two findings fixed alongside it.

Pinning the copy the route is already on makes discovery return that very
row, so prepending the current source listed one stream twice — a phantom
copy in the grouping and a chip that counted it.

And handing the "playing" badge back to the route row left an in-flight
switch valid, so a slow resolution could arrive afterwards and replace the
playback the user had just started with Play, Resume or Restart.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/web/src/app/services/electron.service.performance.spec.ts

@@ -0,0 +1,123 @@
+import { TestBed } from '@angular/core/testing';
+import { MatSnackBar } from '@angular/material/snack-bar';
+import { Store } from '@ngrx/store';
+import { TranslateService } from '@ngx-translate/core';
+import { PlaylistActions } from '@iptvnator/m3u-state';
+import { SettingsStore } from '@iptvnator/services';
+import {
+    PLAYLIST_PARSE_BY_URL,
+    type Playlist,
+} from '@iptvnator/shared/interfaces';
+import {
+    RENDERER_PERFORMANCE_PHASE_HOOK_KEY,
+    type RendererPerformancePhaseEvent,
+} from '@iptvnator/shared/logging';
+import { DialogService } from '@iptvnator/ui/components';
+import { ElectronService } from './electron.service';
+
+describe('ElectronService performance phases', () => {
+    const hookSymbol = Symbol.for(RENDERER_PERFORMANCE_PHASE_HOOK_KEY);
+    const electronBridge = {
+        fetchPlaylistByUrl: jest.fn(),
+        onPlayerError: jest.fn(),
+    };
+    const store = { dispatch: jest.fn() };
+    let service: ElectronService;
+
+    beforeEach(() => {
+        Object.defineProperty(window, 'electron', {
+            configurable: true,
+            value: electronBridge,
+        });
+        electronBridge.fetchPlaylistByUrl.mockReset();
+        electronBridge.onPlayerError.mockReset();
+        store.dispatch.mockReset();
+
+        TestBed.configureTestingModule({
+            providers: [
+                ElectronService,
+                {
+                    provide: DialogService,
+                    useValue: { openConfirmDialog: jest.fn() },
+                },
+                {
+                    provide: MatSnackBar,
+                    useValue: { open: jest.fn() },
+                },
+                {
+                    provide: SettingsStore,
+                    useValue: {
+                        getTrustOptions: jest.fn(() => ({
+                            trustedInsecureTlsHosts: [],
+                            trustedPrivateNetworkEpgUrls: [],
+                        })),
+                    },
+                },
+                { provide: Store, useValue: store },
+                {
+                    provide: TranslateService,
+                    useValue: { instant: jest.fn((key: string) => key) },
+                },
+            ],
+        });
+        service = TestBed.inject(ElectronService);
+    });
+
+    afterEach(() => {
+        delete (globalThis as unknown as Record<symbol, unknown>)[hookSymbol];
+        Object.defineProperty(window, 'electron', {
+            configurable: true,
+            value: undefined,
+        });
+    });
+
+    it('marks the initial URL import store dispatch without exposing playlist data', async () => {
+        const events: RendererPerformancePhaseEvent[] = [];
+        (
+            globalThis as unknown as Record<
+                symbol,
+                (event: RendererPerformancePhaseEvent) => void
+            >
+        )[hookSymbol] = (event) => events.push(event);
+        const playlist = {
+            playlist: { items: [{ name: 'Sensitive channel' }] },
+            title: 'Sensitive title',
+            url: 'https://user:secret@example.test/list.m3u',
+        } as Playlist;
+        electronBridge.fetchPlaylistByUrl.mockResolvedValue(playlist);
+
+        await service.sendIpcEvent(PLAYLIST_PARSE_BY_URL, {
+            title: playlist.title,
+            url: playlist.url,
+        });
+        await Promise.resolve();
+        await Promise.resolve();
+
+        expect(store.dispatch).toHaveBeenCalledWith(
+            PlaylistActions.handleAddingPlaylistByUrl({
+                isTemporary: false,
+                playlist,
+            })
+        );
+        expect(
+            events.map(({ boundary, outcome, phase }) => ({
+                boundary,
+                outcome,
+                phase,
+            }))
+        ).toEqual([
+            {
+                boundary: 'start',
+                outcome: undefined,
+                phase: 'store.m3u-import-dispatch',
+            },
+            {
+                boundary: 'end',
+                outcome: 'success',
+                phase: 'store.m3u-import-dispatch',
+            },
+        ]);
+        expect(JSON.stringify(events)).not.toContain('Sensitive');
+        expect(JSON.stringify(events)).not.toContain('secret');
+    });
+});

apps/web/src/app/services/electron.service.ts

@@ -20,6 +20,10 @@ import {
     XTREAM_RESPONSE,
     XtreamCodeActions,
 } from '@iptvnator/shared/interfaces';
+import {
+    measureRendererPerformancePhase,
+    RENDERER_PERFORMANCE_PHASE,
+} from '@iptvnator/shared/logging';
 import { AppConfig } from '../../environments/environment';
 import { buildAutoUpdatePlaylistsFeedback } from './auto-update-playlists-feedback';
 import {
@@ -316,11 +320,15 @@ export class ElectronService extends DataService {
                 this.settingsStore.getTrustOptions()
             )
             .then((result) => {
-                this.store.dispatch(
-                    PlaylistActions.handleAddingPlaylistByUrl({
-                        isTemporary: !!payload?.isTemporary,
-                        playlist: result,
-                    })
+                measureRendererPerformancePhase(
+                    RENDERER_PERFORMANCE_PHASE.M3U_IMPORT_DISPATCH,
+                    () =>
+                        this.store.dispatch(
+                            PlaylistActions.handleAddingPlaylistByUrl({
+                                isTemporary: !!payload?.isTemporary,
+                                playlist: result,
+                            })
+                        )
                 );
             })
             .catch((error: unknown) => {

apps/web/src/app/settings/settings-form.facade.ts

@@ -10,6 +10,7 @@ import {
     Theme,
 } from '@iptvnator/shared/interfaces';
 import { TranslateService } from '@ngx-translate/core';
+import { SettingsSnackbarService } from './settings-snackbar.service';
 import { SettingsStore } from '../services/settings-store.service';
 import { SettingsService } from '../services/settings.service';
 import {
@@ -33,6 +34,7 @@ export class SettingsFormFacade {
     private readonly formBuilder = inject(FormBuilder);
     private readonly runtime = inject(RuntimeCapabilitiesService);
     private readonly settingsService = inject(SettingsService);
+    private readonly settingsSnackbar = inject(SettingsSnackbarService);
     private readonly settingsStore = inject(SettingsStore);
     private readonly translate = inject(TranslateService);
 
@@ -53,8 +55,14 @@ export class SettingsFormFacade {
     }
 
     /** Waits for the persisted settings to be available */
-    loadSettings(): Promise<void> {
-        return this.settingsStore.loadSettings();
+    async loadSettings(): Promise<void> {
+        await this.settingsStore.loadSettings();
+
+        if (this.settingsStore.storageFailure() === 'load') {
+            // The form is about to show defaults that are not the user's saved
+            // values — say so instead of letting them look genuine.
+            this.settingsSnackbar.storageFailure('load');
+        }
     }
 
     /**
@@ -97,7 +105,9 @@ export class SettingsFormFacade {
         }
 
         this.patchAndMarkDirty({ coverSize }, 'coverSize');
-        void this.settingsStore.updateSettings({ coverSize });
+        this.settingsStore.updateSettings({ coverSize }).catch(() => {
+            this.settingsSnackbar.storageFailure('save');
+        });
     }
 
     selectEpgViewMode(epgViewMode: EpgViewMode): void {
@@ -106,7 +116,9 @@ export class SettingsFormFacade {
         }
 
         this.patchAndMarkDirty({ epgViewMode }, 'epgViewMode');
-        void this.settingsStore.updateSettings({ epgViewMode });
+        this.settingsStore.updateSettings({ epgViewMode }).catch(() => {
+            this.settingsSnackbar.storageFailure('save');
+        });
     }
 
     setRecordingFolder(recordingFolder: string): void {

apps/web/src/app/settings/settings-snackbar.service.ts

@@ -1,9 +1,12 @@
 import { inject, Injectable } from '@angular/core';
 import { MatSnackBar, MatSnackBarConfig } from '@angular/material/snack-bar';
+import { SettingsStorageFailure } from '@iptvnator/services';
+import { TranslateService } from '@ngx-translate/core';
 
 @Injectable()
 export class SettingsSnackbarService {
     private readonly snackBar = inject(MatSnackBar);
+    private readonly translate = inject(TranslateService);
 
     open(message: string, config: MatSnackBarConfig = {}): void {
         this.snackBar.open(message, undefined, {
@@ -14,4 +17,33 @@ export class SettingsSnackbarService {
             ...config,
         });
     }
+
+    /**
+     * Failures need more reading time than the 2s confirmation toast, and a
+     * dismiss action so the message can stay up until it is acknowledged.
+     */
+    error(message: string, dismissLabel: string): void {
+        this.snackBar.open(message, dismissLabel, {
+            duration: 10000,
+            horizontalPosition: 'center',
+            verticalPosition: 'bottom',
+            panelClass: ['settings-snackbar', 'settings-snackbar--error'],
+        });
+    }
+
+    /**
+     * Reports a failed settings read/write. Both mean the same thing to the
+     * user — what is on screen will not survive a restart — so they get a
+     * dismissible warning instead of the silent fallback to defaults.
+     */
+    storageFailure(failure: SettingsStorageFailure): void {
+        this.error(
+            this.translate.instant(
+                failure === 'save'
+                    ? 'SETTINGS.SETTINGS_SAVE_FAILED'
+                    : 'SETTINGS.SETTINGS_LOAD_FAILED'
+            ),
+            this.translate.instant('CLOSE')
+        );
+    }
 }

apps/web/src/app/settings/settings.component.storage-failure.spec.ts

@@ -0,0 +1,128 @@
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
+import { MatDialog } from '@angular/material/dialog';
+import { MatSnackBar } from '@angular/material/snack-bar';
+import { EpgRuntimeBridgeService } from '@iptvnator/epg/data-access';
+import { SettingsStore } from '../services/settings-store.service';
+import { SettingsComponent } from './settings.component';
+import {
+    configureSettingsComponentTestBed,
+    createElectronStub,
+    createEpgBridgeStub,
+    MatSnackBarStub,
+    MockSettingsStore,
+    stubSettingsSideEffects,
+} from './test-stubs/settings-test-harness.stub';
+
+/** Matches the snackbar config used by `SettingsSnackbarService.error`. */
+const ERROR_SNACKBAR_CONFIG = expect.objectContaining({
+    panelClass: ['settings-snackbar', 'settings-snackbar--error'],
+});
+
+/**
+ * Assertions target the MatDialog the component actually calls: spying on the
+ * one returned by `TestBed.inject(MatDialog)` does not observe it.
+ */
+interface SettingsComponentPrivateTestApi {
+    matDialog: MatDialog;
+}
+
+/**
+ * Settings live in the renderer's IndexedDB, and both halves of the round trip
+ * can fail while the UI keeps looking healthy: a failed read shows defaults as
+ * if they were saved, and a failed write is applied in memory so it survives
+ * until the next restart. These cover the user-visible reporting of both.
+ */
+describe('SettingsComponent storage failures', () => {
+    let component: SettingsComponent;
+    let fixture: ComponentFixture<SettingsComponent>;
+    let settingsStore: MockSettingsStore;
+    let snackBar: MatSnackBarStub;
+    let epgBridge: Partial<EpgRuntimeBridgeService>;
+    const originalElectron = window.electron;
+    const componentMatDialog = (): MatDialog =>
+        (component as unknown as SettingsComponentPrivateTestApi).matDialog;
+
+    beforeEach(waitForAsync(() => {
+        epgBridge = createEpgBridgeStub();
+        configureSettingsComponentTestBed(epgBridge);
+    }));
+
+    beforeEach(() => {
+        window.electron = createElectronStub();
+
+        fixture = TestBed.createComponent(SettingsComponent);
+        settingsStore = TestBed.inject(
+            SettingsStore
+        ) as unknown as MockSettingsStore;
+        snackBar = TestBed.inject(MatSnackBar) as unknown as MatSnackBarStub;
+
+        component = fixture.componentInstance;
+        stubSettingsSideEffects(component);
+        fixture.detectChanges();
+    });
+
+    afterEach(() => {
+        window.electron = originalElectron;
+    });
+
+    it('warns when the persisted settings could not be read', async () => {
+        settingsStore.storageFailure.set('load');
+
+        await component.ngOnInit();
+
+        expect(snackBar.open).toHaveBeenCalledWith(
+            'SETTINGS.SETTINGS_LOAD_FAILED',
+            'CLOSE',
+            ERROR_SNACKBAR_CONFIG
+        );
+    });
+
+    it('warns and keeps the dialog open when the settings write fails', async () => {
+        settingsStore.updateSettings.mockRejectedValue(
+            new Error('storage unavailable')
+        );
+        const closeAll = jest.spyOn(componentMatDialog(), 'closeAll');
+        component.isDialog = true;
+
+        component.onSubmit();
+        await fixture.whenStable();
+
+        expect(snackBar.open).toHaveBeenCalledWith(
+            'SETTINGS.SETTINGS_SAVE_FAILED',
+            'CLOSE',
+            ERROR_SNACKBAR_CONFIG
+        );
+        expect(closeAll).not.toHaveBeenCalled();
+    });
+
+    it('closes the dialog only after the settings write succeeded', async () => {
+        settingsStore.updateSettings.mockResolvedValue(undefined);
+        const closeAll = jest.spyOn(componentMatDialog(), 'closeAll');
+        jest.spyOn(component.epg, 'fetchConfiguredEpg').mockImplementation();
+        component.isDialog = true;
+
+        component.onSubmit();
+        // save() resolves a tick after the store write: the callback and
+        // the Electron mirror run first, so the close lands on the next
+        // turn of the microtask queue.
+        await fixture.whenStable();
+        await fixture.whenStable();
+
+        expect(closeAll).toHaveBeenCalledTimes(1);
+    });
+
+    it('warns when a section write fails without leaving an unhandled rejection', async () => {
+        settingsStore.updateSettings.mockRejectedValue(
+            new Error('storage unavailable')
+        );
+
+        component.form.selectCoverSize('large');
+        await fixture.whenStable();
+
+        expect(snackBar.open).toHaveBeenCalledWith(
+            'SETTINGS.SETTINGS_SAVE_FAILED',
+            'CLOSE',
+            ERROR_SNACKBAR_CONFIG
+        );
+    });
+});

apps/web/src/app/settings/settings.component.ts

@@ -202,11 +202,26 @@ export class SettingsComponent implements OnInit, OnDestroy {
      * the indexed db store
      */
     onSubmit(): void {
-        void this.form.save(() => this.applyChangedSettings());
-
-        if (this.isDialog) {
-            this.matDialog.closeAll();
-        }
+        this.form
+            .save(() => this.applyChangedSettings())
+            .then(() => {
+                if (this.isDialog) {
+                    this.matDialog.closeAll();
+                }
+            })
+            .catch(() => {
+                // The store already applied the change in memory, so without
+                // this the save looks successful until the next restart. The
+                // dialog stays open so it can be retried.
+                //
+                // The Electron-side pushes in SettingsFormFacade.save() stay in
+                // the success branch on purpose: main keeps its own copy of the
+                // player paths and remote-control state, and applying half the
+                // form while telling the user nothing was saved is worse than
+                // applying none of it. Once settings live in the main process
+                // (issue #1273) this split disappears.
+                this.settingsSnackbar.storageFailure('save');
+            });
     }
 
     /**

apps/web/src/app/settings/test-stubs/settings-test-harness.stub.ts

@@ -49,6 +49,7 @@ import { MockModule, MockProvider } from 'ng-mocks';
 import { NgxIndexedDBService } from 'ngx-indexed-db';
 import { from, of } from 'rxjs';
 import { ElectronServiceStub } from '../../services/electron.service.stub';
+import { SettingsStorageFailure } from '@iptvnator/services';
 import { SettingsStore } from '../../services/settings-store.service';
 import { SettingsService } from '../../services/settings.service';
 import { SettingsComponent } from '../settings.component';
@@ -149,6 +150,8 @@ export class MockSettingsStore {
 
     updateSettings = jest.fn().mockResolvedValue(undefined);
 
+    storageFailure = signal<SettingsStorageFailure | null>(null);
+
     // Helper method for tests to modify settings
     _setSettings(newSettings: Partial<typeof DEFAULT_SETTINGS>) {
         this._settings.set({

apps/web/src/assets/i18n/ar.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "يتطلب النقر المزدوج على صفوف القنوات قبل بدء التشغيل عبر MPV أو VLC.",
         "LANGUAGE": "اللغة",
         "SETTINGS_SAVED": "نجاح! تم حفظ الإعدادات.",
+        "SETTINGS_SAVE_FAILED": "تعذّر حفظ الإعدادات. ستفقد تغييراتك عند إعادة تشغيل التطبيق.",
+        "SETTINGS_LOAD_FAILED": "تعذّر تحميل الإعدادات المحفوظة — يتم عرض القيم الافتراضية. تأكّد من عدم تشغيل نسخة أخرى من التطبيق.",
         "THEME": "السمة البصرية",
         "SHOW_CAPTIONS": "عرض الترجمات",
         "SHOW_DASHBOARD": "عرض لوحة التحكم",

apps/web/src/assets/i18n/ary.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "خاص دير دوبل كليك على صفوف القنوات قبل ما يبدا التشغيل بـ MPV ولا VLC.",
         "LANGUAGE": "اللغة",
         "SETTINGS_SAVED": "نجاح! الإعدادات تحفضو.",
+        "SETTINGS_SAVE_FAILED": "ماتحفضاتش الإعدادات. التبديلات ديالك غادي تضيع منين تعاود تشعل التطبيق.",
+        "SETTINGS_LOAD_FAILED": "ماتحملاتش الإعدادات المحفوظة — كنوريو القيم الافتراضية. تأكد بلي ماكايناش نسخة أخرى من التطبيق خدامة.",
         "THEME": "المظهر المرئي",
         "SHOW_CAPTIONS": "وري الترجمة",
         "SHOW_DASHBOARD": "وري لوحة التحكم",

apps/web/src/assets/i18n/by.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Патрабаваць падвойны націск па радках каналаў перад пачаткам прайгравання праз MPV або VLC.",
         "LANGUAGE": "Мова",
         "SETTINGS_SAVED": "Новыя налады былі паспяхова захаваны!",
+        "SETTINGS_SAVE_FAILED": "Не ўдалося захаваць налады. Змены будуць страчаны пасля перазапуску праграмы.",
+        "SETTINGS_LOAD_FAILED": "Не ўдалося загрузіць захаваныя налады — паказаны значэнні па змаўчанні. Пераканайцеся, што праграма не запушчана яшчэ раз.",
         "THEME": "Тэма афармлення",
         "SHOW_CAPTIONS": "Адлюстроўваць субтытры",
         "SHOW_DASHBOARD": "Паказаць панэль",

apps/web/src/assets/i18n/de.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Erfordert einen Doppelklick auf Kanalzeilen, bevor die Wiedergabe mit MPV oder VLC startet.",
         "LANGUAGE": "Sprache",
         "SETTINGS_SAVED": "Einstellungen wurden erfolgreich gespeichert!",
+        "SETTINGS_SAVE_FAILED": "Einstellungen konnten nicht gespeichert werden. Die Änderungen gehen beim Neustart der App verloren.",
+        "SETTINGS_LOAD_FAILED": "Gespeicherte Einstellungen konnten nicht geladen werden — es werden Standardwerte angezeigt. Stelle sicher, dass die App nicht bereits läuft.",
         "THEME": "Farbdesign",
         "SHOW_CAPTIONS": "Untertitel anzeigen",
         "SHOW_DASHBOARD": "Dashboard anzeigen",

apps/web/src/assets/i18n/el.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Απαιτεί διπλό κλικ στις γραμμές καναλιών πριν ξεκινήσει η αναπαραγωγή με MPV ή VLC.",
         "LANGUAGE": "Γλώσσα",
         "SETTINGS_SAVED": "Επιτυχία! Η διαμόρφωση αποθηκεύτηκε.",
+        "SETTINGS_SAVE_FAILED": "Δεν ήταν δυνατή η αποθήκευση των ρυθμίσεων. Οι αλλαγές σας θα χαθούν μετά την επανεκκίνηση της εφαρμογής.",
+        "SETTINGS_LOAD_FAILED": "Δεν ήταν δυνατή η φόρτωση των αποθηκευμένων ρυθμίσεων — εμφανίζονται οι προεπιλογές. Βεβαιωθείτε ότι δεν εκτελείται άλλο αντίγραφο της εφαρμογής.",
         "THEME": "Οπτικό θέμα",
         "SHOW_CAPTIONS": "Εμφάνιση υπότιτλων",
         "SHOW_DASHBOARD": "Εμφάνιση πίνακα ελέγχου",

apps/web/src/assets/i18n/en.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Require a double-click on channel rows before MPV or VLC playback starts.",
         "LANGUAGE": "Language",
         "SETTINGS_SAVED": "Success! Configuration was saved.",
+        "SETTINGS_SAVE_FAILED": "Settings could not be saved. Your changes will be lost when the app is restarted.",
+        "SETTINGS_LOAD_FAILED": "Saved settings could not be loaded — showing defaults. Make sure no other copy of the app is running.",
         "THEME": "Visual theme",
         "SHOW_CAPTIONS": "Show subtitles",
         "SHOW_DASHBOARD": "Show dashboard",

apps/web/src/assets/i18n/es.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Requiere doble clic en las filas de canales antes de iniciar la reproducción con MPV o VLC.",
         "LANGUAGE": "Idioma",
         "SETTINGS_SAVED": "¡Completado! La configuración se guardó.",
+        "SETTINGS_SAVE_FAILED": "No se pudo guardar la configuración. Los cambios se perderán al reiniciar la aplicación.",
+        "SETTINGS_LOAD_FAILED": "No se pudo cargar la configuración guardada: se muestran los valores predeterminados. Asegúrate de que no haya otra copia de la aplicación abierta.",
         "THEME": "Tema visual",
         "SHOW_CAPTIONS": "Mostrar subtítulos",
         "SHOW_DASHBOARD": "Mostrar panel",

apps/web/src/assets/i18n/fr.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Exiger un double-clic sur les lignes de chaînes avant de lancer la lecture avec MPV ou VLC.",
         "LANGUAGE": "Langue",
         "SETTINGS_SAVED": "La configuration a été enregistrée avec succès.",
+        "SETTINGS_SAVE_FAILED": "Les paramètres n'ont pas pu être enregistrés. Vos modifications seront perdues au redémarrage de l'application.",
+        "SETTINGS_LOAD_FAILED": "Les paramètres enregistrés n'ont pas pu être chargés — les valeurs par défaut sont affichées. Vérifiez qu'aucune autre copie de l'application n'est ouverte.",
         "THEME": "Thème",
         "SHOW_CAPTIONS": "Afficher les sous-titres",
         "SHOW_DASHBOARD": "Afficher le tableau de bord",

apps/web/src/assets/i18n/hu.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Az MPV- vagy VLC-lejátszás csak a csatornasorra történő dupla kattintással induljon el.",
         "LANGUAGE": "Nyelv",
         "SETTINGS_SAVED": "A beállítások mentése sikerült.",
+        "SETTINGS_SAVE_FAILED": "A beállítások mentése nem sikerült. A módosítások az alkalmazás újraindításakor elvesznek.",
+        "SETTINGS_LOAD_FAILED": "A mentett beállítások betöltése nem sikerült — az alapértelmezett értékek láthatók. Ellenőrizd, hogy nem fut-e az alkalmazás másik példánya.",
         "THEME": "Megjelenési téma",
         "SHOW_CAPTIONS": "Feliratok megjelenítése",
         "SHOW_DASHBOARD": "Vezérlőpult megjelenítése",

apps/web/src/assets/i18n/it.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Richiede un doppio clic sulle righe dei canali prima di avviare la riproduzione con MPV o VLC.",
         "LANGUAGE": "Lingua",
         "SETTINGS_SAVED": "La configurazione è stata salvata.",
+        "SETTINGS_SAVE_FAILED": "Impossibile salvare le impostazioni. Le modifiche andranno perse al riavvio dell'applicazione.",
+        "SETTINGS_LOAD_FAILED": "Impossibile caricare le impostazioni salvate: vengono mostrati i valori predefiniti. Assicurati che non ci sia un'altra copia dell'app in esecuzione.",
         "THEME": "Tema visuale",
         "SHOW_CAPTIONS": "Visualizza sottotitoli",
         "SHOW_DASHBOARD": "Mostra dashboard",

apps/web/src/assets/i18n/ja.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "MPV または VLC の再生を開始する前に、チャンネル行をダブルクリックする必要があります。",
         "LANGUAGE": "言語",
         "SETTINGS_SAVED": "成功！設定が保存されました。",
+        "SETTINGS_SAVE_FAILED": "設定を保存できませんでした。アプリを再起動すると変更は失われます。",
+        "SETTINGS_LOAD_FAILED": "保存された設定を読み込めませんでした。既定値を表示しています。アプリが二重に起動していないか確認してください。",
         "THEME": "視覚テーマ",
         "SHOW_CAPTIONS": "字幕を表示",
         "SHOW_DASHBOARD": "ダッシュボードを表示",

apps/web/src/assets/i18n/ko.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "MPV 또는 VLC 재생을 시작하기 전에 채널 행을 두 번 클릭하도록 합니다.",
         "LANGUAGE": "언어",
         "SETTINGS_SAVED": "설정이 저장되었습니다.",
+        "SETTINGS_SAVE_FAILED": "설정을 저장하지 못했습니다. 앱을 다시 시작하면 변경 사항이 사라집니다.",
+        "SETTINGS_LOAD_FAILED": "저장된 설정을 불러오지 못했습니다. 기본값을 표시합니다. 앱이 중복 실행되고 있지 않은지 확인하세요.",
         "THEME": "테마",
         "SHOW_CAPTIONS": "Show subtitles",
         "SHOW_DASHBOARD": "대시보드 표시",

apps/web/src/assets/i18n/nl.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Vereist een dubbelklik op kanaalrijen voordat MPV- of VLC-weergave start.",
         "LANGUAGE": "Taal",
         "SETTINGS_SAVED": "Succes! De instellingen zijn opgeslagen.",
+        "SETTINGS_SAVE_FAILED": "De instellingen konden niet worden opgeslagen. Je wijzigingen gaan verloren bij het herstarten van de app.",
+        "SETTINGS_LOAD_FAILED": "De opgeslagen instellingen konden niet worden geladen — er worden standaardwaarden getoond. Controleer of de app niet al draait.",
         "THEME": "Visueel thema",
         "SHOW_CAPTIONS": "Ondertiteling weergeven",
         "SHOW_DASHBOARD": "Dashboard tonen",

apps/web/src/assets/i18n/pl.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Wymagaj podwójnego kliknięcia wiersza kanału przed rozpoczęciem odtwarzania w MPV lub VLC.",
         "LANGUAGE": "Język",
         "SETTINGS_SAVED": "Sukces! Konfiguracja została zapisana.",
+        "SETTINGS_SAVE_FAILED": "Nie udało się zapisać ustawień. Zmiany zostaną utracone po ponownym uruchomieniu aplikacji.",
+        "SETTINGS_LOAD_FAILED": "Nie udało się wczytać zapisanych ustawień — wyświetlane są wartości domyślne. Upewnij się, że aplikacja nie jest już uruchomiona.",
         "THEME": "Motyw wizualny",
         "SHOW_CAPTIONS": "Pokaż napisy",
         "SHOW_DASHBOARD": "Pokaż pulpit",

apps/web/src/assets/i18n/pt.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Exige um duplo clique nas linhas de canais antes de iniciar a reprodução no MPV ou VLC.",
         "LANGUAGE": "Idioma",
         "SETTINGS_SAVED": "Sucesso! A configuração foi salva.",
+        "SETTINGS_SAVE_FAILED": "Não foi possível guardar as definições. As alterações serão perdidas ao reiniciar a aplicação.",
+        "SETTINGS_LOAD_FAILED": "Não foi possível carregar as definições guardadas — a mostrar os valores predefinidos. Certifique-se de que a aplicação não está já em execução.",
         "THEME": "Tema visual",
         "SHOW_CAPTIONS": "Mostrar legendas",
         "SHOW_DASHBOARD": "Mostrar dashboard",

apps/web/src/assets/i18n/ru.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "Требовать двойной щелчок по строке канала перед запуском воспроизведения через MPV или VLC.",
         "LANGUAGE": "Язык",
         "SETTINGS_SAVED": "Новые настройки были успешно сохранены!",
+        "SETTINGS_SAVE_FAILED": "Не удалось сохранить настройки. Изменения будут потеряны после перезапуска приложения.",
+        "SETTINGS_LOAD_FAILED": "Не удалось загрузить сохранённые настройки — показаны значения по умолчанию. Убедитесь, что приложение не запущено ещё раз.",
         "THEME": "Тема оформления",
         "SHOW_CAPTIONS": "Отображать субтитры",
         "SHOW_DASHBOARD": "Показывать панель",

apps/web/src/assets/i18n/tr.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "MPV veya VLC oynatımı başlamadan önce kanal satırlarına çift tıklanmasını gerektirir.",
         "LANGUAGE": "Dil",
         "SETTINGS_SAVED": "Başarılı! Yapılandırma kaydedildi.",
+        "SETTINGS_SAVE_FAILED": "Ayarlar kaydedilemedi. Değişiklikleriniz uygulama yeniden başlatıldığında kaybolacak.",
+        "SETTINGS_LOAD_FAILED": "Kaydedilmiş ayarlar yüklenemedi — varsayılanlar gösteriliyor. Uygulamanın başka bir kopyasının çalışmadığından emin olun.",
         "THEME": "Görünüm teması",
         "SHOW_CAPTIONS": "Altyazıları göster",
         "SHOW_DASHBOARD": "Panoyu göster",

apps/web/src/assets/i18n/zh.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "在 MPV 或 VLC 开始播放前，要求双击频道行。",
         "LANGUAGE": "语言",
         "SETTINGS_SAVED": "配置已成功保存",
+        "SETTINGS_SAVE_FAILED": "无法保存设置。重启应用后所做的更改将会丢失。",
+        "SETTINGS_LOAD_FAILED": "无法加载已保存的设置，正在显示默认值。请确认没有重复运行的应用实例。",
         "THEME": "主题",
         "SHOW_CAPTIONS": "显示字幕",
         "SHOW_DASHBOARD": "显示仪表盘",

apps/web/src/assets/i18n/zhtw.json

@@ -290,6 +290,8 @@
         "OPEN_EXTERNAL_PLAYER_ON_DOUBLE_CLICK_DESCRIPTION": "在 MPV 或 VLC 開始播放前，要求雙擊頻道列。",
         "LANGUAGE": "語言",
         "SETTINGS_SAVED": "成功！設定已儲存。",
+        "SETTINGS_SAVE_FAILED": "無法儲存設定。重新啟動應用程式後所做的變更將會遺失。",
+        "SETTINGS_LOAD_FAILED": "無法載入已儲存的設定，正在顯示預設值。請確認沒有重複執行的應用程式。",
         "THEME": "視覺主題",
         "SHOW_CAPTIONS": "顯示字幕",
         "SHOW_DASHBOARD": "顯示儀表板",

apps/web/src/styles.scss

@@ -237,6 +237,14 @@ textarea,
     margin-bottom: calc(76px + env(safe-area-inset-bottom, 0px));
 }
 
+// Failures (settings could not be saved/loaded) must not read as the usual
+// neutral confirmation toast.
+.mat-mdc-snack-bar-container.settings-snackbar--error {
+    --mdc-snackbar-container-color: var(--mat-sys-error-container);
+    --mdc-snackbar-supporting-text-color: var(--mat-sys-on-error-container);
+    --mat-snack-bar-button-color: var(--mat-sys-on-error-container);
+}
+
 // WCAG-friendly visually-hidden helper — content stays in the
 // accessibility tree and DOM query results but occupies no layout box.
 // Used where a visible heading would duplicate adjacent navigation