diff --git a/apps/electron-backend/src/app/events/playlist.events.spec.ts b/apps/electron-backend/src/app/events/playlist.events.spec.ts
new file mode 100644
index 000000000..9292d8d07
--- /dev/null
+++ b/apps/electron-backend/src/app/events/playlist.events.spec.ts
@@ -0,0 +1,408 @@
+import type {
+    Playlist,
+    PlaylistRefreshEvent,
+    PlaylistRefreshPayload,
+} from '@iptvnator/shared/interfaces';
+import {
+    AUTO_UPDATE_PLAYLISTS,
+    PLAYLIST_CANCEL_REFRESH,
+    PLAYLIST_REFRESH,
+    PLAYLIST_REFRESH_EVENT,
+} from '@iptvnator/shared/interfaces';
+
+type IpcHandler = (event: MockIpcEvent, ...args: unknown[]) => Promise<unknown>;
+
+type MockIpcEvent = {
+    sender: {
+        isDestroyed: jest.Mock<boolean, []>;
+        send: jest.Mock;
+    };
+};
+
+type MockWorker = {
+    emit: (event: string, ...args: unknown[]) => boolean;
+    on: jest.Mock;
+    postMessage: jest.Mock;
+    removeAllListeners: jest.Mock;
+    terminate: jest.Mock;
+};
+
+const mockRegisteredHandlers = new Map<string, IpcHandler>();
+const mockAxiosGet = jest.fn();
+const mockShowOpenDialog = jest.fn();
+const mockShowSaveDialog = jest.fn();
+const mockReadFile = jest.fn();
+const mockWriteFile = jest.fn();
+const mockParse = jest.fn();
+const mockCreatePlaylistObject = jest.fn();
+const mockGetFilenameFromUrl = jest.fn();
+const mockResolveWorkerRuntimeBootstrap = jest.fn();
+const mockWorkerInstances: MockWorker[] = [];
+
+jest.mock('electron', () => ({
+    app: {
+        getAppPath: jest.fn(() => '/mock/app'),
+        isPackaged: false,
+    },
+    dialog: {
+        showOpenDialog: (...args: unknown[]) => mockShowOpenDialog(...args),
+        showSaveDialog: (...args: unknown[]) => mockShowSaveDialog(...args),
+    },
+    ipcMain: {
+        handle: jest.fn((channel: string, handler: IpcHandler) => {
+            mockRegisteredHandlers.set(channel, handler);
+        }),
+    },
+}));
+
+jest.mock('axios', () => ({
+    __esModule: true,
+    default: {
+        get: (...args: unknown[]) => mockAxiosGet(...args),
+    },
+}));
+
+jest.mock('iptv-playlist-parser', () => ({
+    parse: (...args: unknown[]) => mockParse(...args),
+}));
+
+jest.mock('@iptvnator/shared/m3u-utils', () => ({
+    createPlaylistObject: (...args: unknown[]) =>
+        mockCreatePlaylistObject(...args),
+    getFilenameFromUrl: (...args: unknown[]) => mockGetFilenameFromUrl(...args),
+}));
+
+jest.mock('node:fs/promises', () => ({
+    readFile: (...args: unknown[]) => mockReadFile(...args),
+    writeFile: (...args: unknown[]) => mockWriteFile(...args),
+}));
+
+jest.mock('worker_threads', () => {
+    const { EventEmitter } = require('events');
+
+    class PlaylistRefreshMockWorker extends EventEmitter {
+        postMessage = jest.fn();
+        removeAllListeners = jest.fn(() => {
+            super.removeAllListeners();
+            return this;
+        });
+        terminate = jest.fn().mockResolvedValue(0);
+    }
+
+    return {
+        Worker: jest.fn().mockImplementation(() => {
+            const worker = new PlaylistRefreshMockWorker();
+            mockWorkerInstances.push(worker as MockWorker);
+            return worker;
+        }),
+    };
+});
+
+jest.mock('../workers/worker-runtime-paths', () => ({
+    resolveWorkerRuntimeBootstrap: (...args: unknown[]) =>
+        mockResolveWorkerRuntimeBootstrap(...args),
+}));
+
+function createPlaylist(overrides: Partial<Playlist> = {}): Playlist {
+    return {
+        _id: 'playlist-new',
+        autoRefresh: false,
+        count: 1,
+        favorites: [],
+        filename: 'Created playlist',
+        importDate: '2026-06-02T00:00:00.000Z',
+        lastUsage: '2026-06-02T00:00:00.000Z',
+        playlist: { items: [{ id: 'channel-1', url: 'https://stream.test' }] },
+        title: 'Created playlist',
+        ...overrides,
+    };
+}
+
+function createIpcEvent(): MockIpcEvent {
+    return {
+        sender: {
+            isDestroyed: jest.fn(() => false),
+            send: jest.fn(),
+        },
+    };
+}
+
+function getHandler(channel: string): IpcHandler {
+    const handler = mockRegisteredHandlers.get(channel);
+
+    if (!handler) {
+        throw new Error(`Expected IPC handler for ${channel}`);
+    }
+
+    return handler;
+}
+
+describe('playlist IPC events', () => {
+    let consoleErrorSpy: jest.SpyInstance;
+    let consoleLogSpy: jest.SpyInstance;
+    let consoleWarnSpy: jest.SpyInstance;
+
+    beforeEach(async () => {
+        jest.resetModules();
+        mockRegisteredHandlers.clear();
+        mockWorkerInstances.length = 0;
+        mockAxiosGet.mockReset();
+        mockShowOpenDialog.mockReset();
+        mockShowSaveDialog.mockReset();
+        mockReadFile.mockReset();
+        mockWriteFile.mockReset();
+        mockParse.mockReset();
+        mockCreatePlaylistObject.mockReset();
+        mockGetFilenameFromUrl.mockReset();
+        mockResolveWorkerRuntimeBootstrap.mockReset().mockReturnValue({
+            nativeModuleSearchPaths: ['/mock/native/modules'],
+            workerPath: '/mock/workers/playlist-refresh.worker.js',
+            workerPathCandidates: ['/mock/workers/playlist-refresh.worker.js'],
+        });
+        consoleErrorSpy = jest.spyOn(console, 'error').mockImplementation();
+        consoleLogSpy = jest.spyOn(console, 'log').mockImplementation();
+        consoleWarnSpy = jest.spyOn(console, 'warn').mockImplementation();
+
+        await import('./playlist.events');
+    });
+
+    afterEach(() => {
+        consoleErrorSpy.mockRestore();
+        consoleLogSpy.mockRestore();
+        consoleWarnSpy.mockRestore();
+    });
+
+    it('fetches a playlist URL, parses it, and returns the created playlist', async () => {
+        const parsedPlaylist = { items: [{ name: 'News' }] };
+        const playlist = createPlaylist({
+            title: 'remote.m3u',
+            url: 'https://example.test/remote.m3u',
+        });
+
+        mockAxiosGet.mockResolvedValue({ data: '#EXTM3U' });
+        mockParse.mockReturnValue(parsedPlaylist);
+        mockGetFilenameFromUrl.mockReturnValue('remote.m3u');
+        mockCreatePlaylistObject.mockReturnValue(playlist);
+
+        const result = await getHandler('fetch-playlist-by-url')(
+            createIpcEvent(),
+            'https://example.test/remote.m3u'
+        );
+
+        expect(mockAxiosGet).toHaveBeenCalledWith(
+            'https://example.test/remote.m3u',
+            { httpsAgent: expect.any(Object) }
+        );
+        expect(mockParse).toHaveBeenCalledWith('#EXTM3U');
+        expect(mockCreatePlaylistObject).toHaveBeenCalledWith(
+            'remote.m3u',
+            parsedPlaylist,
+            'https://example.test/remote.m3u',
+            'URL'
+        );
+        expect(result).toEqual(playlist);
+    });
+
+    it('returns null when the open playlist dialog is cancelled', async () => {
+        mockShowOpenDialog.mockResolvedValue({
+            canceled: true,
+            filePaths: [],
+        });
+
+        const result = await getHandler('open-playlist-from-file')(
+            createIpcEvent()
+        );
+
+        expect(result).toBeNull();
+        expect(mockReadFile).not.toHaveBeenCalled();
+        expect(mockParse).not.toHaveBeenCalled();
+    });
+
+    it('auto-updates URL and file playlists while preserving user fields and skipping unusable entries', async () => {
+        const sourcePlaylists: Playlist[] = [
+            createPlaylist({
+                _id: 'url-playlist',
+                autoRefresh: true,
+                favorites: ['fav-channel'],
+                filePath: undefined,
+                title: 'URL playlist',
+                url: 'https://example.test/list.m3u',
+                userAgent: 'PlaylistAgent/1.0',
+            }),
+            createPlaylist({
+                _id: 'file-playlist',
+                autoRefresh: false,
+                filePath: '/playlists/local.m3u',
+                importDate: '',
+                title: 'File playlist',
+                url: undefined,
+            }),
+            createPlaylist({
+                _id: 'missing-source',
+                filePath: undefined,
+                title: 'Missing source',
+                url: undefined,
+            }),
+        ];
+        const parsedPlaylist = { items: [{ name: 'Updated' }] };
+
+        mockAxiosGet.mockResolvedValue({ data: '#EXTM3U url' });
+        mockReadFile.mockResolvedValue('#EXTM3U file');
+        mockParse.mockReturnValue(parsedPlaylist);
+        mockGetFilenameFromUrl.mockReturnValue('list.m3u');
+        mockCreatePlaylistObject
+            .mockReturnValueOnce(
+                createPlaylist({
+                    _id: 'new-url-playlist',
+                    autoRefresh: false,
+                    favorites: [],
+                    title: 'Updated URL playlist',
+                    url: 'https://example.test/list.m3u',
+                })
+            )
+            .mockReturnValueOnce(
+                createPlaylist({
+                    _id: 'new-file-playlist',
+                    autoRefresh: true,
+                    filePath: '/playlists/local.m3u',
+                    title: 'Updated file playlist',
+                })
+            );
+
+        const result = await getHandler(AUTO_UPDATE_PLAYLISTS)(
+            createIpcEvent(),
+            sourcePlaylists
+        );
+
+        expect(result).toEqual([
+            expect.objectContaining({
+                _id: 'url-playlist',
+                autoRefresh: true,
+                favorites: ['fav-channel'],
+                title: 'Updated URL playlist',
+                userAgent: 'PlaylistAgent/1.0',
+            }),
+            expect.objectContaining({
+                _id: 'file-playlist',
+                autoRefresh: false,
+                favorites: [],
+                title: 'Updated file playlist',
+            }),
+        ]);
+        expect(mockAxiosGet).toHaveBeenCalledWith(
+            'https://example.test/list.m3u',
+            { httpsAgent: expect.any(Object) }
+        );
+        expect(mockReadFile).toHaveBeenCalledWith(
+            '/playlists/local.m3u',
+            'utf-8'
+        );
+        expect(consoleWarnSpy).toHaveBeenCalledWith(
+            'Skipping playlist "Missing source": no URL or file path found'
+        );
+    });
+
+    it('forwards playlist refresh worker events, resolves successful responses, and cleans up the worker', async () => {
+        const ipcEvent = createIpcEvent();
+        const payload: PlaylistRefreshPayload = {
+            operationId: 'refresh-1',
+            playlistId: 'playlist-1',
+            title: 'Playlist 1',
+            url: 'https://example.test/list.m3u',
+        };
+        const workerEvent: PlaylistRefreshEvent = {
+            operationId: 'refresh-1',
+            phase: 'fetching',
+            playlistId: 'playlist-1',
+            status: 'started',
+        };
+        const playlist = createPlaylist({ _id: 'playlist-1' });
+
+        const refreshPromise = getHandler(PLAYLIST_REFRESH)(ipcEvent, payload);
+        const worker = mockWorkerInstances[0];
+
+        expect(mockResolveWorkerRuntimeBootstrap).toHaveBeenCalledWith(
+            expect.objectContaining({
+                developmentWorkerDir: expect.stringContaining('workers'),
+                workerFilename: 'playlist-refresh.worker.js',
+            })
+        );
+
+        worker.emit('message', { type: 'ready' });
+        expect(worker.postMessage).toHaveBeenCalledWith({
+            payload,
+            type: 'request',
+        });
+
+        worker.emit('message', { event: workerEvent, type: 'event' });
+        expect(ipcEvent.sender.send).toHaveBeenCalledWith(
+            PLAYLIST_REFRESH_EVENT,
+            workerEvent
+        );
+
+        ipcEvent.sender.send.mockClear();
+        ipcEvent.sender.isDestroyed.mockReturnValue(true);
+        worker.emit('message', { event: workerEvent, type: 'event' });
+        expect(ipcEvent.sender.send).not.toHaveBeenCalled();
+
+        worker.emit('message', {
+            result: playlist,
+            success: true,
+            type: 'response',
+        });
+
+        await expect(refreshPromise).resolves.toEqual(playlist);
+        expect(worker.removeAllListeners).toHaveBeenCalled();
+        expect(worker.terminate).toHaveBeenCalled();
+    });
+
+    it('routes refresh cancellation to the active worker and converts worker error responses to Error instances', async () => {
+        const payload: PlaylistRefreshPayload = {
+            operationId: 'refresh-error',
+            playlistId: 'playlist-error',
+            title: 'Playlist error',
+            filePath: '/playlists/error.m3u',
+        };
+        const refreshPromise = getHandler(PLAYLIST_REFRESH)(
+            createIpcEvent(),
+            payload
+        );
+        const worker = mockWorkerInstances[0];
+
+        expect(
+            await getHandler(PLAYLIST_CANCEL_REFRESH)(
+                createIpcEvent(),
+                'refresh-error'
+            )
+        ).toEqual({ success: true });
+        expect(worker.postMessage).toHaveBeenCalledWith({
+            operationId: 'refresh-error',
+            type: 'cancel',
+        });
+
+        const rejectedRefresh = expect(refreshPromise).rejects.toMatchObject({
+            message: 'Refresh failed',
+            name: 'PlaylistRefreshFailure',
+            stack: 'worker stack',
+        });
+
+        worker.emit('message', {
+            error: {
+                message: 'Refresh failed',
+                name: 'PlaylistRefreshFailure',
+                stack: 'worker stack',
+            },
+            success: false,
+            type: 'response',
+        });
+
+        await rejectedRefresh;
+
+        expect(
+            await getHandler(PLAYLIST_CANCEL_REFRESH)(
+                createIpcEvent(),
+                'refresh-error'
+            )
+        ).toEqual({ success: false });
+    });
+});
diff --git a/apps/electron-backend/src/app/events/playlist.events.ts b/apps/electron-backend/src/app/events/playlist.events.ts
index f9920b322..f9926ea5d 100644
--- a/apps/electron-backend/src/app/events/playlist.events.ts
+++ b/apps/electron-backend/src/app/events/playlist.events.ts
@@ -52,7 +52,7 @@ const activePlaylistRefreshes = new Map<string, ActivePlaylistRefresh>();
 async function fetchPlaylistFromUrl(
     url: string,
     title?: string
-): Promise<any> {
+): Promise<Playlist> {
     const agent = new https.Agent({
         rejectUnauthorized: false,
     });
@@ -85,7 +85,7 @@ async function fetchPlaylistFromUrl(
 async function fetchPlaylistFromFile(
     filePath: string,
     title: string
-): Promise<any> {
+): Promise<Playlist> {
     const fileContent = await readFile(filePath, 'utf-8');
     const parsedPlaylist = parse(fileContent);
     const playlistObject = createPlaylistObject(
@@ -137,6 +137,24 @@ function createPlaylistRefreshError(error: {
     return workerError;
 }
 
+function derivePlaylistTitleFromFilePath(filePath: string): string {
+    const filename = basename(filePath);
+    return filename.replace(/\.(m3u8?|pls|txt)$/i, '') || 'from file';
+}
+
+function preserveAutoUpdatedPlaylistFields(
+    playlistObject: Playlist,
+    playlist: Playlist
+): Playlist {
+    return {
+        ...playlistObject,
+        _id: playlist._id,
+        autoRefresh: playlist.autoRefresh,
+        favorites: playlist.favorites || [],
+        userAgent: playlist.userAgent,
+    };
+}
+
 ipcMain.handle('fetch-playlist-by-url', async (event, url, title?: string) => {
     try {
         return await fetchPlaylistFromUrl(url, title);
@@ -175,9 +193,7 @@ ipcMain.handle('open-playlist-from-file', async () => {
     const filePath = filePaths[0];
 
     try {
-        // Extract filename from path and remove extension for a clean title
-        const filename = basename(filePath);
-        const title = filename.replace(/\.(m3u8?|pls|txt)$/i, '') || 'from file';
+        const title = derivePlaylistTitleFromFilePath(filePath);
 
         return await fetchPlaylistFromFile(filePath, title);
     } catch (error) {
@@ -189,7 +205,7 @@ ipcMain.handle('open-playlist-from-file', async () => {
 ipcMain.handle(AUTO_UPDATE_PLAYLISTS, async (event, playlists) => {
     console.log(`Auto-updating ${playlists.length} playlist(s)...`);
 
-    const updatedPlaylists = [];
+    const updatedPlaylists: Playlist[] = [];
 
     for (const playlist of playlists) {
         try {
@@ -220,14 +236,9 @@ ipcMain.handle(AUTO_UPDATE_PLAYLISTS, async (event, playlists) => {
                 continue;
             }
 
-            // Preserve user data when updating playlist
-            updatedPlaylists.push({
-                ...playlistObject,
-                _id: playlist._id,
-                autoRefresh: playlist.autoRefresh,
-                favorites: playlist.favorites || [], // Preserve favorites
-                userAgent: playlist.userAgent, // Preserve custom user agent
-            });
+            updatedPlaylists.push(
+                preserveAutoUpdatedPlaylistFields(playlistObject, playlist)
+            );
 
             console.log(`Successfully updated playlist "${playlist.title}"`);
         } catch (error) {