feat(switcher): rebuild the playlist switcher as an overlay popover

The switcher's mat-menu becomes a CDK connected overlay
(app-playlist-switcher-panel), 440px wide, with a dimmed, blurred
backdrop; only its list scrolls and row menus open above it.

- Header with the source count, Add playlist and All sources.
- Search by name or host, autofocused; the type filter is one segmented
  control (All / M3U / Xtream / Stalker with counts) instead of three
  checkboxes, remembered between openings (the old checkbox setting is
  migrated). The search is no longer kept between openings.
- "Recent" (the three most recently opened, kept across restarts) above
  "All" in the Sources page order, as compact source rows: the current
  one tinted with a check. Each row's ⋯ menu holds Refresh, Playlist
  info, Account info, Check again and Remove (with Undo); the footer's
  info, account and add actions moved there and to the header.
- Keyboard: a listbox driven by aria-activedescendant from the search
  field. Arrow keys move and wrap, Enter opens, Shift+F10 opens the
  row's menu, Escape closes and returns focus to the trigger. Hints in
  the footer.
- Deleting from a row menu moves focus to the toast's Undo, since the
  row (and its focus) left the page.

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

apps/electron-backend-e2e/src/playlist-switcher.e2e.ts

@@ -245,44 +245,41 @@ test.describe('Electron Playlist Switcher', () => {
             await waitForM3uCatalog(app.mainWindow);
 
             await openPlaylistFavorites(app.mainWindow);
-            await expect(channelItemByTitle(app.mainWindow, localAChannelName)).toHaveCount(
-                1
-            );
-            await expect(channelItemByTitle(app.mainWindow, localBChannelName)).toHaveCount(
-                0
-            );
+            await expect(
+                channelItemByTitle(app.mainWindow, localAChannelName)
+            ).toHaveCount(1);
+            await expect(
+                channelItemByTitle(app.mainWindow, localBChannelName)
+            ).toHaveCount(0);
 
             await switchPlaylistFromHeader(app.mainWindow, localBDisplayName);
             await expectPathname(
                 app.mainWindow,
                 /\/workspace\/global-favorites$/
             );
-            await expect(channelItemByTitle(app.mainWindow, localBChannelName)).toHaveCount(
-                1
-            );
-            await expect(channelItemByTitle(app.mainWindow, localAChannelName)).toHaveCount(
-                0
-            );
+            await expect(
+                channelItemByTitle(app.mainWindow, localBChannelName)
+            ).toHaveCount(1);
+            await expect(
+                channelItemByTitle(app.mainWindow, localAChannelName)
+            ).toHaveCount(0);
 
             await openPlaylistRecent(app.mainWindow);
-            await expect(channelItemByTitle(app.mainWindow, localBChannelName)).toHaveCount(
-                1
-            );
-            await expect(channelItemByTitle(app.mainWindow, localAChannelName)).toHaveCount(
-                0
-            );
+            await expect(
+                channelItemByTitle(app.mainWindow, localBChannelName)
+            ).toHaveCount(1);
+            await expect(
+                channelItemByTitle(app.mainWindow, localAChannelName)
+            ).toHaveCount(0);
 
             await switchPlaylistFromHeader(app.mainWindow, localADisplayName);
-            await expectPathname(
-                app.mainWindow,
-                /\/workspace\/global-recent$/
-            );
-            await expect(channelItemByTitle(app.mainWindow, localAChannelName)).toHaveCount(
-                1
-            );
-            await expect(channelItemByTitle(app.mainWindow, localBChannelName)).toHaveCount(
-                0
-            );
+            await expectPathname(app.mainWindow, /\/workspace\/global-recent$/);
+            await expect(
+                channelItemByTitle(app.mainWindow, localAChannelName)
+            ).toHaveCount(1);
+            await expect(
+                channelItemByTitle(app.mainWindow, localBChannelName)
+            ).toHaveCount(0);
         } finally {
             await closeElectronApp(app);
         }
@@ -319,7 +316,9 @@ test.describe('Electron Playlist Switcher', () => {
                 username: xtreamStressUsername,
             });
 
-            const overlay = app.mainWindow.locator('.workspace-loading-overlay');
+            const overlay = app.mainWindow.locator(
+                '.workspace-loading-overlay'
+            );
             await expect(overlay).toBeVisible({ timeout: 15000 });
             await waitForDbOperationEvent(app.mainWindow, {
                 operation: 'save-content',
@@ -428,17 +427,116 @@ test.describe('Electron Playlist Switcher', () => {
             await switchPlaylistFromHeader(app.mainWindow, offlineXtreamName);
             await waitForXtreamCatalog(app.mainWindow);
             await expectXtreamUnavailableWarning(app.mainWindow);
-            await expect(app.mainWindow.locator('.xtream-content-gate')).toHaveCount(
-                0
-            );
+            await expect(
+                app.mainWindow.locator('.xtream-content-gate')
+            ).toHaveCount(0);
 
             app = await restartElectronApp(app, dataDir);
 
             await waitForXtreamCatalog(app.mainWindow);
             await expectXtreamUnavailableWarning(app.mainWindow);
-            await expect(app.mainWindow.locator('.xtream-content-gate')).toHaveCount(
-                0
+            await expect(
+                app.mainWindow.locator('.xtream-content-gate')
+            ).toHaveCount(0);
+        } finally {
+            await closeElectronApp(app);
+        }
+    });
+
+    test('runs from the keyboard: Cmd/Ctrl+P, filter, arrows, Enter and Escape', async ({
+        dataDir,
+        request,
+    }) => {
+        await resetMockServers(request, ['xtream']);
+        const localAPath = writeTemporaryM3uFile(dataDir, localAFileName, [
+            {
+                groupTitle: 'News',
+                name: 'Switcher Local A',
+                url: 'https://streams.example.test/switcher-local-a.m3u8',
+            },
+        ]);
+        const localBPath = writeTemporaryM3uFile(dataDir, localBFileName, [
+            {
+                groupTitle: 'Sports',
+                name: 'Switcher Local B',
+                url: 'https://streams.example.test/switcher-local-b.m3u8',
+            },
+        ]);
+        const app = await launchElectronApp(dataDir);
+        const page = app.mainWindow;
+
+        try {
+            await importM3uPlaylistFromNativeDialog(app, localAPath);
+            await importM3uPlaylistFromNativeDialog(app, localBPath);
+            await addXtreamPortal(page, { name: xtreamAName });
+            await waitForXtreamCatalog(page);
+
+            const trigger = page.getByTestId('playlist-switcher-trigger');
+            const panel = page.locator('app-playlist-switcher-panel');
+            const search = panel.locator('input[role="combobox"]');
+            await expect(playlistSwitcherTitle(page)).toContainText(
+                xtreamAName
             );
+
+            await page.keyboard.press('ControlOrMeta+p');
+            await expect(search).toBeFocused();
+            // No list shows a credential: the Xtream row names the account
+            // on purpose, never its password.
+            await expect(panel).not.toContainText(defaultXtreamPassword);
+            await expect(panel).not.toContainText('password=');
+
+            await page.keyboard.type('switcher-local');
+            await expect(switcherOptions(page)).toHaveCount(2);
+            // A search highlights its first match; ↓ moves on, ↑ wraps.
+            const options = switcherOptions(page);
+            const firstId = (await options.nth(0).getAttribute('id')) ?? '';
+            const secondId = (await options.nth(1).getAttribute('id')) ?? '';
+            await expect(search).toHaveAttribute(
+                'aria-activedescendant',
+                firstId
+            );
+            await page.keyboard.press('ArrowDown');
+            await expect(search).toHaveAttribute(
+                'aria-activedescendant',
+                secondId
+            );
+            await page.keyboard.press('ArrowDown');
+            await expect(search).toHaveAttribute(
+                'aria-activedescendant',
+                firstId
+            );
+            await page.keyboard.press('ArrowUp');
+            await expect(search).toHaveAttribute(
+                'aria-activedescendant',
+                secondId
+            );
+            const targetName =
+                (
+                    await options
+                        .nth(1)
+                        .locator('.source-row__name')
+                        .textContent()
+                )?.trim() ?? '';
+            await page.keyboard.press('Enter');
+
+            await expect(panel).toHaveCount(0);
+            await waitForM3uCatalog(page);
+            await expect(playlistSwitcherTitle(page)).toContainText(targetName);
+
+            // Escape closes and puts focus back on the trigger.
+            await page.keyboard.press('ControlOrMeta+p');
+            await expect(search).toBeFocused();
+            await page.keyboard.press('Escape');
+            await expect(panel).toHaveCount(0);
+            await expect(trigger).toBeFocused();
+
+            await openSources(page);
+            await expect(
+                page.locator('app-workspace-sources app-source-row')
+            ).toHaveCount(3);
+            await expect(
+                page.locator('app-workspace-sources')
+            ).not.toContainText(defaultXtreamPassword);
         } finally {
             await closeElectronApp(app);
         }
@@ -446,12 +544,12 @@ test.describe('Electron Playlist Switcher', () => {
 });
 
 async function openPlaylistSwitcher(page: Page): Promise<void> {
-    await page
-        .locator('app-playlist-switcher .playlist-switcher-trigger')
-        .click();
-    await expect(
-        page.locator('.cdk-overlay-pane .playlist-item').first()
-    ).toBeVisible();
+    await page.getByTestId('playlist-switcher-trigger').click();
+    await expect(switcherOptions(page).first()).toBeVisible();
+}
+
+function switcherOptions(page: Page) {
+    return page.locator('app-playlist-switcher-panel [role="option"]');
 }
 
 async function switchPlaylistFromHeader(
@@ -459,16 +557,11 @@ async function switchPlaylistFromHeader(
     title: string
 ): Promise<void> {
     await openPlaylistSwitcher(page);
-    const item = page
-        .locator('.cdk-overlay-pane .playlist-item')
-        .filter({ hasText: title })
-        .first();
+    const item = switcherOptions(page).filter({ hasText: title }).first();
 
     await expect(item).toBeVisible();
     await item.click();
-    await expect(page.locator('.cdk-overlay-pane .playlist-item')).toHaveCount(
-        0
-    );
+    await expect(page.locator('app-playlist-switcher-panel')).toHaveCount(0);
 }
 
 async function expectPathname(page: Page, pattern: RegExp): Promise<void> {
@@ -503,16 +596,21 @@ async function selectSettingsOption(
 }
 
 async function expectXtreamUnavailableWarning(page: Page): Promise<void> {
-    await expect(
-        page.getByTestId('xtream-offline-warning')
-    ).toBeVisible({ timeout: 20000 });
+    await expect(page.getByTestId('xtream-offline-warning')).toBeVisible({
+        timeout: 20000,
+    });
 }
 
-async function toggleFavoriteForChannel(page: Page, title: string): Promise<void> {
+async function toggleFavoriteForChannel(
+    page: Page,
+    title: string
+): Promise<void> {
     const item = channelItemByTitle(page, title).first();
 
     await expect(item).toBeVisible({ timeout: 20000 });
     await item.hover();
     await item.locator('.favorite-button').first().click();
-    await expect(item.locator('.favorite-button mat-icon').first()).toHaveText(/star/);
+    await expect(item.locator('.favorite-button mat-icon').first()).toHaveText(
+        /star/
+    );
 }

apps/electron-backend-e2e/src/sources-keyboard.e2e.ts

@@ -175,4 +175,69 @@ test.describe('Electron Sources keyboard', () => {
             await closeElectronApp(app);
         }
     });
+
+    test('@m3u @electron deletes from the row menu and undoes from the toast, keyboard only', async ({
+        dataDir,
+    }) => {
+        const alpha = writeTemporaryM3uFile(dataDir, 'undo-alpha.m3u', [
+            {
+                groupTitle: 'News',
+                name: 'Undo Alpha News',
+                url: 'https://streams.example.test/undo-alpha.m3u8',
+            },
+        ]);
+        const bravo = writeTemporaryM3uFile(dataDir, 'undo-bravo.m3u', [
+            {
+                groupTitle: 'Sports',
+                name: 'Undo Bravo Sports',
+                url: 'https://streams.example.test/undo-bravo.m3u8',
+            },
+        ]);
+        const app = await launchElectronApp(dataDir, {
+            appArgs: [alpha, bravo],
+        });
+        const page = app.mainWindow;
+        const rows = page.locator('app-workspace-sources app-source-row');
+
+        try {
+            await page.waitForURL(/\/workspace\/playlists\/.+/, {
+                timeout: 30_000,
+            });
+            await openSources(page);
+            await expect(rows).toHaveCount(2, { timeout: 30_000 });
+            const before = await rows
+                .locator('.source-row__name')
+                .allTextContents();
+
+            // Focus the first row's ⋯ and open its menu from the keyboard.
+            const row = rows.first();
+            await row.locator('.source-row__more').focus();
+            await page.keyboard.press('Enter');
+            const remove = page.getByRole('menuitem', {
+                name: 'Remove playlist',
+            });
+            await expect(remove).toBeVisible();
+            await page.keyboard.press('End');
+            await expect(remove).toBeFocused();
+            await page.keyboard.press('Enter');
+
+            // The row leaves at once; Undo takes the focus the row had.
+            await expect(rows).toHaveCount(1);
+            const undo = page.locator(
+                'mat-snack-bar-container.app-toast .source-removal-toast__undo'
+            );
+            await expect(undo).toBeFocused();
+            await page.keyboard.press('Enter');
+
+            await expect(rows).toHaveCount(2);
+            expect(
+                await rows.locator('.source-row__name').allTextContents()
+            ).toEqual(before);
+            await expect(
+                page.locator('mat-snack-bar-container.app-toast')
+            ).toHaveCount(0);
+        } finally {
+            await closeElectronApp(app);
+        }
+    });
 });

apps/electron-backend-e2e/src/sources.e2e.ts

@@ -785,11 +785,20 @@ https://streams.example.test/original-url.m3u8
         try {
             await dropM3uPlaylistOntoWorkspace(app.mainWindow, localFilePath);
             await waitForM3uCatalog(app.mainWindow);
+            // Refresh for the active source lives in its switcher row menu.
+            await app.mainWindow.getByTestId('playlist-switcher-trigger').click();
+            const currentRow = app.mainWindow.locator(
+                'app-playlist-switcher-panel [role="option"][aria-current="true"]'
+            );
+            await currentRow.locator('.source-row__more').click();
             await expect(
-                app.mainWindow.locator(
-                    'app-playlist-switcher .trigger-refresh-button'
-                )
+                app.mainWindow.getByRole('menuitem', { name: 'Refresh playlist' })
             ).toBeVisible();
+            await app.mainWindow.keyboard.press('Escape');
+            await app.mainWindow.keyboard.press('Escape');
+            await expect(
+                app.mainWindow.locator('app-playlist-switcher-panel')
+            ).toHaveCount(0);
 
             await goToDashboard(app.mainWindow);
             const sourceCard = app.mainWindow