feat(portals): fold live TV panels in nested levels with a category dropdown (#1556)

## Summary

Live TV panels now fold from the outside in, in three nested levels, instead of one toggle that hid the categories rail and the channel list together:

1. **Categories + channels + player** (browse, unchanged).
2. **Channels + player** — a new `chevron_left` in the categories rail header hides only that rail. The channels header then turns its title into a **category dropdown** that opens the same shell panel as a popover (search, sort, counts, selection are one implementation), plus a `chevron_right` that brings the rail back.
3. **Player only** — the channels header chevron, as before. The floating restore handle and `Cmd/Ctrl+B` return to the level the user collapsed from, not always to level 1.

Every level is restored as stored, per surface (`live-sidebar-state:<surface>`, from #1555): a hidden rail is discoverable through the workspace header toggle and the hidden-list empty state that #1555 added, so this PR no longer needs its original "player-only never restores" rule. The level `Cmd/Ctrl+B` comes back to is seeded from the restored level and kept for the session.

## Design notes

- Nested levels rather than two independent booleans: "channels hidden, categories visible" makes no sense since a category click has to bring the channels back anyway. The model follows the outside-in collapse of three-pane apps (Mail, Slack, Plex).
- The categories rail folds at level 2 **only while a category is selected**: the live root ("All Items" grid) has no channels header to host the way back, so folding there would strand the user. Level 3 folds it regardless, because the floating restore handle lives in the content area.
- `LIVE_CATEGORIES_POPOVER` (`@iptvnator/portal/shared/util`) is the DI bridge: the workspace shell provides `WorkspaceLiveCategoriesPopoverService` (CDK overlay hosting `WorkspaceContextPanelComponent` in `presentation="popover"`), the Xtream and Stalker live layouts inject it optionally and keep their plain heading without a provider.
- M3U and the unified live tab have no categories rail and treat level 2 like level 1; their code is untouched.

## Merged with #1555 (per-surface rail state)

#1555 landed while this PR was open and reworked the same service: state per surface (`m3u` / `portal` / `collection`), a workspace header toggle, the hidden-list empty state, and the legacy shared key forgotten on startup. This PR keeps that model and layers the three levels onto the `portal` surface (`areCategoriesHiddenFor`, `hideCategories` / `showCategories` / `collapse` / `expand` per surface; `toggle(surface)` returns to the level the surface collapsed from). "Show playing channel" uses `expand('portal')` so it keeps a deliberately hidden categories rail folded, and the category sort preference moved to `PortalCategorySortStateService` so the popover copy of the context panel and the retained rail agree.

## Also fixed along the way

- The channels header showed "Channels" instead of the category name: provider category ids are strings, the selection is numeric. Compared via `String()` now.
- A collapsed context panel left a 22px padding strip beside the channels rail.
- The panel toggle labels said "Hide channels list" while also hiding categories; labels and tooltips are honest now (8 new i18n keys, all 18 locales).



Docs: `docs/architecture/iptvnator-ui-guidelines.md` ("Collapsible Live Sidebar" rewritten), `docs/architecture/workspace-shell.md`. Release note: `.changes/portals-live-panel-collapse-levels.md`.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

libs/workspace/shell/feature/src/lib/workspace-context-panel/components/workspace-context-category-view.component.html

@@ -1,5 +1,8 @@
 @if (items().length > 0) {
-    <div class="nav-list" id="portal-categories">
+    <div
+        class="nav-list"
+        [attr.id]="columnHandoff() ? 'portal-categories' : null"
+    >
         @if (statusText()) {
             <div class="context-inline-status">
                 {{ statusText() }}
@@ -9,7 +12,7 @@
             <button
                 type="button"
                 class="nav-item category-item"
-                (keydown)="focusLiveChannels($event)"
+                (keydown)="onCategoryKeydown($event)"
                 [attr.data-category-id]="
                     $any(item).category_id ?? $any(item).xtream_id ?? item.id
                 "

libs/workspace/shell/feature/src/lib/workspace-context-panel/components/workspace-context-category-view.component.ts

@@ -28,7 +28,6 @@ interface WorkspaceCategoryViewItem {
     styleUrl: './workspace-context-category-view.component.scss',
 })
 export class WorkspaceContextCategoryViewComponent {
-    readonly focusLiveChannels = focusLiveChannels;
 
     readonly items = input<ReadonlyArray<WorkspaceCategoryViewItem>>([]);
     readonly selectedCategoryId = input<string | number | null | undefined>();
@@ -43,6 +42,24 @@ export class WorkspaceContextCategoryViewComponent {
     readonly omitMissingCounts = input(false);
     readonly interactionEnabled = input(true);
     readonly statusText = input('');
+    /**
+     * The in-flow shell rail takes part in the live-TV column keyboard
+     * contract: it is `#portal-categories` (ArrowLeft from the channels pane
+     * lands on the selected category) and ArrowRight on that category hands
+     * focus to `#live-channels`. The same view stamped into the categories
+     * popover must opt out: the dialog's focus trap would bounce that
+     * handoff back into the dialog, and a second `#portal-categories` would
+     * shadow the folded rail's.
+     */
+    readonly columnHandoff = input(true);
+
+    onCategoryKeydown(event: KeyboardEvent): void {
+        // A method, not an inline `&&`: an event binding whose expression
+        // evaluates to `false` makes Angular call preventDefault().
+        if (this.columnHandoff()) {
+            focusLiveChannels(event);
+        }
+    }
 
     private readonly hostEl = inject(ElementRef<HTMLElement>);
 

libs/workspace/shell/feature/src/lib/workspace-context-panel/workspace-context-panel.component.html

@@ -5,6 +5,7 @@
             <div class="context-header__actions">
                 @if (canSearchCategories()) {
                     <button
+                        #firstHeaderAction
                         type="button"
                         mat-icon-button
                         class="context-header__action"
@@ -64,6 +65,7 @@
                         type="button"
                         mat-icon-button
                         class="context-header__action"
+                        data-test-id="context-manage-categories"
                         (click)="openManageCategories()"
                         [disabled]="!canManageXtreamCategories()"
                         [matTooltip]="
@@ -76,6 +78,22 @@
                         <mat-icon>tune</mat-icon>
                     </button>
                 }
+                @if (canHideCategories()) {
+                    <button
+                        #hideCategoriesButton
+                        type="button"
+                        mat-icon-button
+                        class="context-header__action"
+                        data-test-id="context-hide-categories"
+                        (click)="hideCategories()"
+                        [matTooltip]="'LAYOUT.HIDE_CATEGORIES' | translate"
+                        [attr.aria-label]="
+                            'LAYOUT.HIDE_CATEGORIES' | translate
+                        "
+                    >
+                        <mat-icon>chevron_left</mat-icon>
+                    </button>
+                }
             </div>
         </div>
         <!-- @if (subtitle(); as text) {
@@ -130,6 +148,7 @@
             </div>
         } @else {
             <app-workspace-context-category-view
+                [columnHandoff]="presentation() === 'sidebar'"
                 [items]="filteredXtreamCategories()"
                 [selectedCategoryId]="xtreamSelectedCategoryId()"
                 [itemCounts]="xtreamCategoryItemCounts()"
@@ -162,6 +181,7 @@
             />
         } @else {
             <app-workspace-context-category-view
+                [columnHandoff]="presentation() === 'sidebar'"
                 [items]="filteredStalkerCategories()"
                 [selectedCategoryId]="$any(stalkerSelectedCategoryId())"
                 [itemCounts]="stalkerCategoryItemCounts()"

libs/workspace/shell/feature/src/lib/workspace-context-panel/workspace-context-panel.component.spec.ts

@@ -15,6 +15,7 @@ import {
     XtreamContentLoadState,
     XtreamStore,
 } from '@iptvnator/portal/xtream/data-access';
+import { LiveLayoutSidebarStateService } from '@iptvnator/portal/shared/util';
 import { WorkspaceContextPanelComponent } from './workspace-context-panel.component';
 
 const translations: Record<string, string> = {
@@ -116,6 +117,7 @@ describe('WorkspaceContextPanelComponent', () => {
     const dialog = {
         open: jest.fn(),
     };
+    const drawerOpen = signal(false);
 
     beforeEach(async () => {
         localStorage.removeItem(WORKSPACE_CATEGORY_SORT_STORAGE_KEY);
@@ -142,6 +144,7 @@ describe('WorkspaceContextPanelComponent', () => {
         ]);
         router.navigate.mockClear();
         dialog.open.mockClear();
+        drawerOpen.set(false);
 
         await TestBed.configureTestingModule({
             imports: [WorkspaceContextPanelComponent, NoopAnimationsModule],
@@ -179,7 +182,7 @@ describe('WorkspaceContextPanelComponent', () => {
                     // Root-provided in production; stubbed because the spec's
                     // Router mock has no `events` stream for the real service.
                     provide: WorkspaceShellContextDrawerService,
-                    useValue: { close: jest.fn(), isOpen: () => false },
+                    useValue: { close: jest.fn(), isOpen: drawerOpen },
                 },
             ],
         }).compileComponents();
@@ -204,9 +207,9 @@ describe('WorkspaceContextPanelComponent', () => {
         const status = fixture.nativeElement.querySelector(
             '.context-inline-status'
         ) as HTMLElement | null;
-        const manageButton = Array.from(
-            fixture.nativeElement.querySelectorAll('.context-header__action')
-        ).at(-1) as HTMLButtonElement | undefined;
+        const manageButton = fixture.nativeElement.querySelector(
+            '[data-test-id="context-manage-categories"]'
+        ) as HTMLButtonElement | null;
 
         expect(countPlaceholders).toHaveLength(2);
         expect(categoryButtons.every((button) => button.disabled)).toBe(true);
@@ -261,9 +264,9 @@ describe('WorkspaceContextPanelComponent', () => {
         const categoryButtons = Array.from(
             fixture.nativeElement.querySelectorAll('.category-item')
         ) as HTMLButtonElement[];
-        const manageButton = Array.from(
-            fixture.nativeElement.querySelectorAll('.context-header__action')
-        ).at(-1) as HTMLButtonElement | undefined;
+        const manageButton = fixture.nativeElement.querySelector(
+            '[data-test-id="context-manage-categories"]'
+        ) as HTMLButtonElement | null;
 
         expect(countTexts).toEqual(['3', '0']);
         expect(categoryButtons.every((button) => !button.disabled)).toBe(true);
@@ -493,6 +496,189 @@ describe('WorkspaceContextPanelComponent', () => {
         ).toBeNull();
     });
 
+    describe('folded categories rail', () => {
+        let liveSidebarService: LiveLayoutSidebarStateService;
+
+        beforeEach(() => {
+            liveSidebarService = TestBed.inject(LiveLayoutSidebarStateService);
+            liveSidebarService.setState('portal', 'expanded');
+        });
+
+        afterEach(() => {
+            liveSidebarService.setState('portal', 'expanded');
+        });
+
+        function hideButton(): HTMLButtonElement | null {
+            return fixture.nativeElement.querySelector(
+                '[data-test-id="context-hide-categories"]'
+            );
+        }
+
+        it('offers the hide-categories chevron on live sections of the sidebar and folds the rail', () => {
+            fixture.componentRef.setInput('section', 'live');
+            xtreamSelectedCategoryId.set(1);
+            fixture.detectChanges();
+
+            const button = hideButton();
+            expect(button).not.toBeNull();
+            expect(button?.getAttribute('aria-label')).toBe(
+                'LAYOUT.HIDE_CATEGORIES'
+            );
+
+            button?.click();
+
+            expect(liveSidebarService.stateOf('portal')()).toBe('categories-hidden');
+        });
+
+        it('offers it for Stalker itv and radio too', () => {
+            fixture.componentRef.setInput('context', {
+                provider: 'stalker',
+                playlistId: 'stalker-1',
+            });
+            fixture.componentRef.setInput('section', 'radio');
+            stalkerStore.selectedCategoryId.set('12');
+            fixture.detectChanges();
+
+            expect(hideButton()).not.toBeNull();
+        });
+
+        it('withholds the chevron inside the open phone drawer, whose stylesheet ignores the folded state', () => {
+            fixture.componentRef.setInput('section', 'live');
+            xtreamSelectedCategoryId.set(1);
+            drawerOpen.set(true);
+            fixture.detectChanges();
+
+            expect(hideButton()).toBeNull();
+        });
+
+        it('names the chevron as focus target, the first header action without one, and nothing while categories are absent', () => {
+            fixture.componentRef.setInput('section', 'live');
+            xtreamSelectedCategoryId.set(1);
+            fixture.detectChanges();
+            expect(fixture.componentInstance.focusTarget()).toBe(hideButton());
+
+            // Live root: no chevron, the search action stands in.
+            xtreamSelectedCategoryId.set(null);
+            fixture.detectChanges();
+            expect(fixture.componentInstance.focusTarget()).toBe(
+                fixture.nativeElement.querySelector('.context-header__action')
+            );
+
+            // Nothing loaded yet: no control at all, the caller falls back.
+            xtreamCategories.set([]);
+            fixture.detectChanges();
+            expect(fixture.componentInstance.focusTarget()).toBeNull();
+        });
+
+        it('withholds the chevron while no category is selected (live root has no channels rail)', () => {
+            fixture.componentRef.setInput('section', 'live');
+            xtreamSelectedCategoryId.set(null);
+            fixture.detectChanges();
+
+            expect(hideButton()).toBeNull();
+        });
+
+        it('keeps VOD and series rails without the chevron', () => {
+            fixture.componentRef.setInput('section', 'vod');
+            xtreamSelectedCategoryId.set(1);
+            fixture.detectChanges();
+
+            expect(hideButton()).toBeNull();
+        });
+
+        it('renders no chevron in the popover presentation, whose footer restores the rail instead', () => {
+            fixture.componentRef.setInput('section', 'live');
+            fixture.componentRef.setInput('presentation', 'popover');
+            xtreamSelectedCategoryId.set(1);
+            fixture.detectChanges();
+
+            expect(hideButton()).toBeNull();
+        });
+
+        it('shares the category sort with a second (popover) instance of the panel', () => {
+            fixture.componentRef.setInput('section', 'live');
+            xtreamSelectedCategoryId.set(1);
+            fixture.detectChanges();
+            fixture.componentInstance.setCategorySortMode('name-desc');
+
+            const popover = TestBed.createComponent(
+                WorkspaceContextPanelComponent
+            );
+            popover.componentRef.setInput('context', {
+                provider: 'xtreams',
+                playlistId: 'playlist-1',
+            });
+            popover.componentRef.setInput('section', 'live');
+            popover.componentRef.setInput('presentation', 'popover');
+            popover.detectChanges();
+            expect(popover.componentInstance.categorySortMode()).toBe(
+                'name-desc'
+            );
+
+            popover.componentInstance.setCategorySortMode('name-asc');
+            expect(fixture.componentInstance.categorySortMode()).toBe(
+                'name-asc'
+            );
+            popover.destroy();
+        });
+
+        it('keeps the live-TV column keyboard contract out of the popover', () => {
+            fixture.componentRef.setInput('section', 'live');
+            xtreamSelectedCategoryId.set(1);
+            xtreamSelectedTypeContentState.set('ready');
+            fixture.detectChanges();
+            expect(
+                fixture.nativeElement.querySelector('#portal-categories')
+            ).not.toBeNull();
+
+            fixture.componentRef.setInput('presentation', 'popover');
+            fixture.detectChanges();
+            expect(
+                fixture.nativeElement.querySelector('#portal-categories')
+            ).toBeNull();
+
+            // ArrowRight on the selected category must not reach the
+            // background channels pane from inside the dialog.
+            const pane = document.createElement('div');
+            pane.id = 'live-channels';
+            pane.tabIndex = -1;
+            document.body.appendChild(pane);
+            pane.checkVisibility = () => true;
+            try {
+                const selected = fixture.nativeElement.querySelector(
+                    '.category-item[aria-current="true"]'
+                ) as HTMLButtonElement;
+                selected.focus();
+                const event = new KeyboardEvent('keydown', {
+                    key: 'ArrowRight',
+                    bubbles: true,
+                    cancelable: true,
+                });
+                selected.dispatchEvent(event);
+
+                expect(event.defaultPrevented).toBe(false);
+                expect(document.activeElement).toBe(selected);
+            } finally {
+                pane.remove();
+            }
+        });
+
+        it('reports a category selection so a popover host can close', () => {
+            fixture.componentRef.setInput('section', 'live');
+            xtreamSelectedTypeContentState.set('ready');
+            fixture.detectChanges();
+            const selected = jest.fn();
+            fixture.componentInstance.categorySelected.subscribe(selected);
+
+            const categoryButtons = Array.from(
+                fixture.nativeElement.querySelectorAll('.category-item')
+            ) as HTMLButtonElement[];
+            categoryButtons[1]?.click();
+
+            expect(selected).toHaveBeenCalledTimes(1);
+        });
+    });
+
     it('preserves the active xtream live item when switching live categories', () => {
         fixture.componentRef.setInput('section', 'live');
         xtreamSelectedTypeContentState.set('ready');

libs/workspace/shell/feature/src/lib/workspace-context-panel/workspace-context-panel.component.ts

@@ -5,6 +5,7 @@ import {
     effect,
     inject,
     input,
+    output,
     signal,
     viewChild,
     ElementRef,
@@ -22,9 +23,9 @@ import {
     asStalkerPortalError,
 } from '@iptvnator/portal/stalker/data-access';
 import {
+    LiveLayoutSidebarStateService,
     PortalCategorySortMode,
-    persistPortalCategorySortMode,
-    restorePortalCategorySortMode,
+    PortalCategorySortStateService,
     sortPortalCategoryItems,
 } from '@iptvnator/portal/shared/util';
 import { XtreamStore } from '@iptvnator/portal/xtream/data-access';
@@ -80,9 +81,49 @@ export class WorkspaceContextPanelComponent {
     private readonly contextDrawer = inject(WorkspaceShellContextDrawerService, {
         optional: true,
     });
+    private readonly liveSidebarState = inject(LiveLayoutSidebarStateService);
 
     readonly context = input.required<WorkspaceContextRoute>();
     readonly section = input.required<string>();
+    /**
+     * `sidebar` is the in-flow shell rail and offers the "hide categories"
+     * chevron on live sections; `popover` is the same panel stamped into the
+     * live categories dropdown while that rail is folded, where the chevron
+     * would be meaningless (the popover's own footer restores the rail).
+     */
+    readonly presentation = input<'sidebar' | 'popover'>('sidebar');
+    /** A category was picked; the popover host closes on it. */
+    readonly categorySelected = output<void>();
+
+    readonly isLiveSection = computed(() => {
+        const section = this.section();
+        return (
+            (this.context().provider === 'xtreams' && section === 'live') ||
+            (this.context().provider === 'stalker' &&
+                (section === 'itv' || section === 'radio'))
+        );
+    });
+    // Only while a category is selected: that is when the live layout
+    // renders the channels rail whose header offers the way back. Not in the
+    // open phone drawer either: its stylesheet ignores the folded state, so
+    // the tap would change nothing visible while persisting a preference
+    // that only bites once the window is wide again.
+    readonly canHideCategories = computed(
+        () =>
+            this.presentation() === 'sidebar' &&
+            this.isLiveSection() &&
+            !this.contextDrawer?.isOpen() &&
+            (this.context().provider === 'xtreams'
+                ? this.xtreamSelectedCategoryId() !== null
+                : !!this.stalkerSelectedCategoryId())
+    );
+    private readonly hideCategoriesButton = viewChild(
+        'hideCategoriesButton',
+        { read: ElementRef<HTMLElement> }
+    );
+    private readonly firstHeaderAction = viewChild('firstHeaderAction', {
+        read: ElementRef<HTMLElement>,
+    });
 
     readonly isXtreamCategories = computed(
         () =>
@@ -212,9 +253,9 @@ export class WorkspaceContextPanelComponent {
         viewChild<ElementRef<HTMLInputElement>>('searchInput');
     readonly isSearchOpen = signal(false);
     readonly categorySearchTerm = signal('');
-    readonly categorySortMode = signal<PortalCategorySortMode>(
-        restorePortalCategorySortMode()
-    );
+    // Shared with the popover copy of this panel; see the service's note.
+    private readonly categorySort = inject(PortalCategorySortStateService);
+    readonly categorySortMode = this.categorySort.mode;
     readonly categorySortLabelKey = computed(() =>
         this.getCategorySortLabelKey(this.categorySortMode())
     );
@@ -333,6 +374,22 @@ export class WorkspaceContextPanelComponent {
         });
     }
 
+    /**
+     * The control the shell sidebar hands focus to once this rail has
+     * unfolded (the button the user activated to bring it back is gone by
+     * then): the hide chevron when it is offered, else the first header
+     * action. `null` while neither is rendered — categories still loading,
+     * or a failed Stalker load — and the sidebar falls back to the rail
+     * itself.
+     */
+    focusTarget(): HTMLElement | null {
+        return (
+            this.hideCategoriesButton()?.nativeElement ??
+            this.firstHeaderAction()?.nativeElement ??
+            null
+        );
+    }
+
     toggleCategorySearch(): void {
         const opening = !this.isSearchOpen();
         this.isSearchOpen.set(opening);
@@ -352,8 +409,7 @@ export class WorkspaceContextPanelComponent {
     }
 
     setCategorySortMode(mode: PortalCategorySortMode): void {
-        this.categorySortMode.set(mode);
-        persistPortalCategorySortMode(mode);
+        this.categorySort.setMode(mode);
     }
 
     openManageCategories(): void {
@@ -398,6 +454,10 @@ export class WorkspaceContextPanelComponent {
         );
     }
 
+    hideCategories(): void {
+        this.liveSidebarState.hideCategories('portal');
+    }
+
     onXtreamCategoryClicked(category: XtreamCategoryLike): void {
         if (!this.isXtreamCategoryInteractionEnabled()) {
             return;
@@ -415,6 +475,7 @@ export class WorkspaceContextPanelComponent {
         }
         const categoryId = numericCategoryId;
         this.contextDrawer?.close();
+        this.categorySelected.emit();
 
         if (section === 'live') {
             this.xtreamStore.setSelectedCategory(categoryId);
@@ -456,6 +517,7 @@ export class WorkspaceContextPanelComponent {
         const categoryId = String(item.category_id ?? '*');
 
         this.contextDrawer?.close();
+        this.categorySelected.emit();
         this.stalkerStore.setSelectedCategory(categoryId);
         this.stalkerStore.setPage(0);
 

libs/workspace/shell/feature/src/lib/workspace-live-categories-popover/workspace-live-categories-popover.component.html

@@ -0,0 +1,22 @@
+@if (context(); as context) {
+    @if (section(); as section) {
+        <app-workspace-context-panel
+            class="popover-panel"
+            presentation="popover"
+            [context]="context"
+            [section]="section"
+            (categorySelected)="onCategorySelected()"
+        />
+    }
+}
+<div class="popover-footer">
+    <button
+        type="button"
+        class="popover-footer__action"
+        data-test-id="live-categories-popover-show-panel"
+        (click)="showCategoriesPanel()"
+    >
+        <mat-icon>chevron_right</mat-icon>
+        <span>{{ 'LAYOUT.SHOW_CATEGORIES_PANEL' | translate }}</span>
+    </button>
+</div>

libs/workspace/shell/feature/src/lib/workspace-live-categories-popover/workspace-live-categories-popover.component.scss

@@ -0,0 +1,61 @@
+// Height-capped by the overlay to the space below the anchor: the embedded
+// panel's own list scrolls, header and footer stay put.
+:host {
+    display: flex;
+    flex-direction: column;
+    min-height: 0;
+    max-height: 100%;
+    width: 300px;
+    padding: 8px 6px 6px;
+    border-radius: 14px;
+    // Widget surface, one step above the channels rail it floats over, plus a
+    // hairline so the two do not merge where their edges meet.
+    background: var(--app-widget-bg, var(--mat-sys-surface-container));
+    outline: 1px solid var(--mat-sys-outline-variant);
+    box-shadow: 0 16px 40px -16px rgba(0, 0, 0, 0.5);
+    color: var(--mat-sys-on-surface);
+}
+
+.popover-panel {
+    flex: 1 1 auto;
+    min-height: 0;
+}
+
+.popover-footer {
+    flex: none;
+    margin-top: 6px;
+    padding-top: 6px;
+    border-top: 1px solid var(--mat-sys-outline-variant);
+}
+
+.popover-footer__action {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    width: 100%;
+    padding: 6px 8px;
+    border: 0;
+    border-radius: 8px;
+    background: transparent;
+    color: var(--mat-sys-primary);
+    font: inherit;
+    font-size: 0.82rem;
+    font-weight: 500;
+    cursor: pointer;
+    text-align: left;
+
+    mat-icon {
+        font-size: 18px;
+        width: 18px;
+        height: 18px;
+    }
+
+    &:hover {
+        background: var(--app-hover-overlay, rgba(255, 255, 255, 0.08));
+    }
+
+    &:focus-visible {
+        outline: 2px solid var(--mat-sys-primary);
+        outline-offset: -2px;
+    }
+}

libs/workspace/shell/feature/src/lib/workspace-live-categories-popover/workspace-live-categories-popover.component.ts

@@ -0,0 +1,72 @@
+import { CdkTrapFocus } from '@angular/cdk/a11y';
+import {
+    ChangeDetectionStrategy,
+    Component,
+    inject,
+    output,
+} from '@angular/core';
+import { MatIcon } from '@angular/material/icon';
+import { TranslatePipe, TranslateService } from '@ngx-translate/core';
+import { LIVE_CATEGORIES_POPOVER } from '@iptvnator/portal/shared/util';
+import { WorkspaceContextPanelComponent } from '../workspace-context-panel/workspace-context-panel.component';
+import { WorkspaceShellRouteStateService } from '../workspace-shell/services/workspace-shell-route-state.service';
+
+/**
+ * The live categories rail stamped into a popover while that rail is folded
+ * (`LiveSidebarState` `categories-hidden`). It renders the very same
+ * `WorkspaceContextPanelComponent` the shell sidebar uses, so search, sort,
+ * counts, selection and the category click handlers stay one implementation;
+ * only the presentation differs (no hide chevron, a footer that restores the
+ * rail). Opened by `WorkspaceLiveCategoriesPopoverService`.
+ *
+ * The trigger advertises `aria-haspopup="dialog"`, so the host is that
+ * dialog: it carries the role and label, and `CdkTrapFocus` (a host
+ * directive) moves focus into the panel on open and keeps Tab inside it
+ * while the backdrop hides the page underneath. The service returns focus
+ * to the trigger on close.
+ */
+@Component({
+    selector: 'app-workspace-live-categories-popover',
+    imports: [MatIcon, TranslatePipe, WorkspaceContextPanelComponent],
+    templateUrl: './workspace-live-categories-popover.component.html',
+    styleUrl: './workspace-live-categories-popover.component.scss',
+    changeDetection: ChangeDetectionStrategy.OnPush,
+    hostDirectives: [CdkTrapFocus],
+    host: {
+        role: 'dialog',
+        'aria-modal': 'true',
+        '[attr.aria-label]': 'dialogLabel',
+    },
+})
+export class WorkspaceLiveCategoriesPopoverComponent {
+    private readonly routeState = inject(WorkspaceShellRouteStateService);
+    // The shell-provided popover bridge that hosts this component.
+    private readonly popover = inject(LIVE_CATEGORIES_POPOVER);
+    readonly dialogLabel = inject(TranslateService).instant(
+        'LAYOUT.CHOOSE_CATEGORY'
+    );
+
+    constructor() {
+        // Host directive inputs cannot be bound from a portal-created
+        // component, so the trap is configured here; the directive's own
+        // AfterContentInit runs after this constructor and captures focus.
+        const focusTrap = inject(CdkTrapFocus, { self: true });
+        focusTrap.enabled = true;
+        focusTrap.autoCapture = true;
+    }
+
+    readonly context = this.routeState.currentContext;
+    readonly section = this.routeState.currentSection;
+    /** Fired when the popover wants to be closed by its host. */
+    readonly closed = output<void>();
+
+    onCategorySelected(): void {
+        this.closed.emit();
+    }
+
+    showCategoriesPanel(): void {
+        // Restores the rail (and opens the phone drawer where the rail is
+        // one); the service closes this popover as part of it.
+        this.popover.showCategoriesPanel();
+    }
+}

libs/workspace/shell/feature/src/lib/workspace-live-categories-popover/workspace-live-categories-popover.service.spec.ts

@@ -0,0 +1,286 @@
+import { OverlayModule } from '@angular/cdk/overlay';
+import {
+    ApplicationRef,
+    Component,
+    input,
+    output,
+    signal,
+} from '@angular/core';
+import { TestBed } from '@angular/core/testing';
+import { NoopAnimationsModule } from '@angular/platform-browser/animations';
+import { NavigationEnd, NavigationStart, Router } from '@angular/router';
+import { TranslatePipe, TranslateService } from '@ngx-translate/core';
+import { MockPipe } from 'ng-mocks';
+import { Subject, of } from 'rxjs';
+import {
+    LIVE_CATEGORIES_POPOVER,
+    LiveLayoutSidebarStateService,
+    liveSidebarStateStorageKey,
+} from '@iptvnator/portal/shared/util';
+import { WorkspaceShellContextDrawerService } from '@iptvnator/workspace/shell/util';
+import { WorkspaceContextPanelComponent } from '../workspace-context-panel/workspace-context-panel.component';
+import { WorkspaceShellRouteStateService } from '../workspace-shell/services/workspace-shell-route-state.service';
+import { WorkspaceLiveCategoriesPopoverComponent } from './workspace-live-categories-popover.component';
+import { WorkspaceLiveCategoriesPopoverService } from './workspace-live-categories-popover.service';
+
+@Component({
+    selector: 'app-workspace-context-panel',
+    template: `<div data-test-id="stub-context-panel">{{ section() }}</div>
+        <button data-test-id="stub-pick" (click)="categorySelected.emit()">
+            pick
+        </button>`,
+    standalone: true,
+})
+class StubWorkspaceContextPanelComponent {
+    readonly context = input.required<unknown>();
+    readonly section = input.required<string>();
+    readonly presentation = input<'sidebar' | 'popover'>('sidebar');
+    readonly categorySelected = output<void>();
+}
+
+describe('WorkspaceLiveCategoriesPopoverService', () => {
+    let service: WorkspaceLiveCategoriesPopoverService;
+    let sidebarState: LiveLayoutSidebarStateService;
+    let origin: HTMLButtonElement;
+    let routerEvents: Subject<unknown>;
+    const drawer = { open: jest.fn(), close: jest.fn(), isOpen: () => false };
+    let phoneViewport = false;
+
+    // Portal-attached views render on the next application tick; no fixture
+    // drives change detection here.
+    function open(): void {
+        service.open(origin);
+        TestBed.inject(ApplicationRef).tick();
+    }
+
+    function pane(): HTMLElement | null {
+        return document.querySelector(
+            '.workspace-live-categories-popover-pane'
+        );
+    }
+
+    beforeEach(async () => {
+        localStorage.removeItem(liveSidebarStateStorageKey('portal'));
+        routerEvents = new Subject();
+        drawer.open.mockClear();
+        phoneViewport = false;
+        Object.defineProperty(window, 'matchMedia', {
+            configurable: true,
+            writable: true,
+            value: (query: string) => ({
+                matches: query.includes('640') && phoneViewport,
+                media: query,
+                addEventListener: jest.fn(),
+                removeEventListener: jest.fn(),
+            }),
+        });
+        await TestBed.configureTestingModule({
+            imports: [OverlayModule, NoopAnimationsModule],
+            providers: [
+                WorkspaceLiveCategoriesPopoverService,
+                {
+                    provide: LIVE_CATEGORIES_POPOVER,
+                    useExisting: WorkspaceLiveCategoriesPopoverService,
+                },
+                { provide: WorkspaceShellContextDrawerService, useValue: drawer },
+                {
+                    provide: Router,
+                    useValue: { events: routerEvents.asObservable() },
+                },
+                {
+                    provide: WorkspaceShellRouteStateService,
+                    useValue: {
+                        currentContext: signal({
+                            provider: 'xtreams',
+                            playlistId: 'pl-1',
+                        }),
+                        currentSection: signal('live'),
+                    },
+                },
+                {
+                    provide: TranslateService,
+                    useValue: {
+                        instant: (key: string) => key,
+                        get: (key: string) => of(key),
+                        stream: (key: string) => of(key),
+                        onLangChange: of(null),
+                        onTranslationChange: of(null),
+                        onDefaultLangChange: of(null),
+                        currentLang: 'en',
+                        defaultLang: 'en',
+                    },
+                },
+            ],
+        })
+            .overrideComponent(WorkspaceLiveCategoriesPopoverComponent, {
+                remove: {
+                    imports: [WorkspaceContextPanelComponent, TranslatePipe],
+                },
+                add: {
+                    imports: [
+                        StubWorkspaceContextPanelComponent,
+                        MockPipe(TranslatePipe, (value: string) => value),
+                    ],
+                },
+            })
+            .compileComponents();
+
+        service = TestBed.inject(WorkspaceLiveCategoriesPopoverService);
+        sidebarState = TestBed.inject(LiveLayoutSidebarStateService);
+        sidebarState.hideCategories('portal');
+        origin = document.createElement('button');
+        document.body.appendChild(origin);
+    });
+
+    afterEach(() => {
+        service.close();
+        origin.remove();
+        sidebarState.setState('portal', 'expanded');
+        localStorage.removeItem(liveSidebarStateStorageKey('portal'));
+    });
+
+    it('opens the categories panel in popover presentation under the origin', () => {
+        open();
+
+        const panel = pane()?.querySelector(
+            '[data-test-id="stub-context-panel"]'
+        );
+        expect(panel).not.toBeNull();
+        expect(panel?.textContent).toContain('live');
+        expect(origin.getAttribute('aria-expanded')).toBe('true');
+    });
+
+    it('toggles closed when opened again from the same origin', () => {
+        open();
+        open();
+
+        expect(pane()).toBeNull();
+        expect(origin.getAttribute('aria-expanded')).toBe('false');
+    });
+
+    it('restores the rail from the footer and closes', () => {
+        open();
+
+        (
+            pane()?.querySelector(
+                '[data-test-id="live-categories-popover-show-panel"]'
+            ) as HTMLButtonElement
+        ).click();
+
+        expect(sidebarState.stateOf('portal')()).toBe('expanded');
+        expect(pane()).toBeNull();
+        expect(drawer.open).not.toHaveBeenCalled();
+    });
+
+    it('opens the phone context drawer as well, since the rail is that drawer there', () => {
+        phoneViewport = true;
+        open();
+
+        service.showCategoriesPanel();
+
+        expect(sidebarState.stateOf('portal')()).toBe('expanded');
+        expect(pane()).toBeNull();
+        expect(drawer.open).toHaveBeenCalledTimes(1);
+    });
+
+    it('closes after a category selection', () => {
+        open();
+
+        (
+            pane()?.querySelector(
+                '[data-test-id="stub-pick"]'
+            ) as HTMLButtonElement
+        ).click();
+
+        expect(pane()).toBeNull();
+        expect(sidebarState.stateOf('portal')()).toBe('categories-hidden');
+    });
+
+    it('closes on backdrop click and leaves the rail folded', () => {
+        open();
+
+        const backdrop = document.querySelector(
+            '.cdk-overlay-backdrop'
+        ) as HTMLElement;
+        expect(backdrop).not.toBeNull();
+        backdrop.click();
+
+        expect(pane()).toBeNull();
+        expect(sidebarState.stateOf('portal')()).toBe('categories-hidden');
+    });
+
+    it('is a labelled modal dialog that traps and takes focus on open', async () => {
+        // JSDOM lays nothing out, so the CDK interactivity checker sees every
+        // element as invisible and never focuses one; give them geometry.
+        const geometry = jest
+            .spyOn(HTMLElement.prototype, 'offsetWidth', 'get')
+            .mockReturnValue(10);
+        try {
+            open();
+            // CdkTrapFocus captures focus once the zone settles.
+            await new Promise((resolve) => setTimeout(resolve));
+
+            const host = pane()?.querySelector(
+                'app-workspace-live-categories-popover'
+            );
+            expect(host?.getAttribute('role')).toBe('dialog');
+            expect(host?.getAttribute('aria-modal')).toBe('true');
+            expect(host?.getAttribute('aria-label')).toBe(
+                'LAYOUT.CHOOSE_CATEGORY'
+            );
+            expect(
+                pane()?.querySelectorAll('.cdk-focus-trap-anchor').length
+            ).toBe(2);
+            expect(host?.contains(document.activeElement)).toBe(true);
+
+            service.close();
+
+            expect(document.activeElement).toBe(origin);
+        } finally {
+            geometry.mockRestore();
+        }
+    });
+
+    it('closes when a navigation starts, so it cannot float over the next route', () => {
+        open();
+
+        routerEvents.next(new NavigationEnd(1, '/a', '/a'));
+        expect(pane()).not.toBeNull();
+
+        routerEvents.next(new NavigationStart(2, '/b'));
+
+        expect(pane()).toBeNull();
+    });
+
+    it('closes on any live-panel level change, e.g. Cmd/Ctrl+B reaching the layout through the dialog', () => {
+        open();
+
+        sidebarState.collapse('portal');
+        TestBed.inject(ApplicationRef).tick();
+
+        expect(pane()).toBeNull();
+    });
+
+    it('does not hand focus back to a trigger inside a folded, inert rail', () => {
+        const rail = document.createElement('div');
+        rail.appendChild(origin);
+        document.body.appendChild(rail);
+        open();
+
+        rail.setAttribute('inert', '');
+        service.close();
+
+        expect(document.activeElement).not.toBe(origin);
+        rail.remove();
+    });
+
+    it('closes on Escape', () => {
+        open();
+
+        document.body.dispatchEvent(
+            new KeyboardEvent('keydown', { key: 'Escape', bubbles: true })
+        );
+
+        expect(pane()).toBeNull();
+    });
+});

libs/workspace/shell/feature/src/lib/workspace-live-categories-popover/workspace-live-categories-popover.service.ts

@@ -0,0 +1,168 @@
+import { Overlay, OverlayRef } from '@angular/cdk/overlay';
+import { ComponentPortal } from '@angular/cdk/portal';
+import {
+    DestroyRef,
+    effect,
+    inject,
+    Injectable,
+    Injector,
+    untracked,
+} from '@angular/core';
+import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
+import { NavigationStart, Router } from '@angular/router';
+import { filter } from 'rxjs';
+import {
+    LiveCategoriesPopover,
+    LiveLayoutSidebarStateService,
+} from '@iptvnator/portal/shared/util';
+import { WorkspaceShellContextDrawerService } from '@iptvnator/workspace/shell/util';
+import { WorkspaceLiveCategoriesPopoverComponent } from './workspace-live-categories-popover.component';
+
+/**
+ * Shell-side implementation of `LIVE_CATEGORIES_POPOVER`. Provided on the
+ * workspace shell so the live layouts rendered in its router outlet can open
+ * the folded categories rail as a popover under their category dropdown.
+ *
+ * One popover at a time: opening from the origin that already owns it closes
+ * it (toggle), opening from another origin moves it. The transparent backdrop
+ * and Escape close it, and so does any category selection or the footer's
+ * "show categories panel" action, which the component reports through
+ * `closed`. Any router navigation closes it too: the shell (and so this
+ * service) outlives the child route that owns the trigger, and browser
+ * Back/Forward or a global shortcut route would otherwise leave the panel
+ * floating over the destination page, re-rendered for the new route's
+ * context. So does any live-panel level change: `Cmd/Ctrl+B` reaches the
+ * layout's document-level handler through the dialog, and the trigger that
+ * owns this popover is then inside a folded, `inert` rail.
+ */
+@Injectable()
+export class WorkspaceLiveCategoriesPopoverService
+    implements LiveCategoriesPopover
+{
+    private readonly overlay = inject(Overlay);
+    private readonly injector = inject(Injector);
+    private readonly sidebarState = inject(LiveLayoutSidebarStateService);
+    private readonly contextDrawer = inject(WorkspaceShellContextDrawerService);
+    private overlayRef: OverlayRef | null = null;
+    private origin: HTMLElement | null = null;
+
+    constructor() {
+        inject(DestroyRef).onDestroy(() => this.close());
+        inject(Router)
+            .events.pipe(
+                filter((event) => event instanceof NavigationStart),
+                takeUntilDestroyed()
+            )
+            .subscribe(() => this.close());
+        // Seeded by the effect's first run, not at construction: the state
+        // may move between the two before anything is open.
+        const sidebarState = this.sidebarState.stateOf('portal');
+        let previous: string | null = null;
+        effect(() => {
+            const next = sidebarState();
+            const changed = previous !== null && next !== previous;
+            previous = next;
+            if (changed) {
+                untracked(() => this.close());
+            }
+        });
+    }
+
+    open(origin: HTMLElement): void {
+        if (this.overlayRef && this.origin === origin) {
+            this.close();
+            return;
+        }
+        this.close();
+
+        const overlayRef = this.overlay.create({
+            hasBackdrop: true,
+            backdropClass: 'cdk-overlay-transparent-backdrop',
+            panelClass: 'workspace-live-categories-popover-pane',
+            scrollStrategy: this.overlay.scrollStrategies.reposition(),
+            positionStrategy: this.overlay
+                .position()
+                .flexibleConnectedTo(origin)
+                .withPositions([
+                    {
+                        originX: 'start',
+                        originY: 'bottom',
+                        overlayX: 'start',
+                        overlayY: 'top',
+                        offsetY: 6,
+                    },
+                    {
+                        originX: 'start',
+                        originY: 'top',
+                        overlayX: 'start',
+                        overlayY: 'bottom',
+                        offsetY: -6,
+                    },
+                ])
+                .withFlexibleDimensions(true)
+                .withGrowAfterOpen(true)
+                .withPush(true)
+                .withViewportMargin(8),
+            maxHeight: 'min(480px, calc(100vh - 16px))',
+        });
+        this.overlayRef = overlayRef;
+        this.origin = origin;
+
+        const componentRef = overlayRef.attach(
+            new ComponentPortal(
+                WorkspaceLiveCategoriesPopoverComponent,
+                null,
+                this.injector
+            )
+        );
+        componentRef.instance.closed.subscribe(() => this.close());
+        overlayRef.backdropClick().subscribe(() => this.close());
+        overlayRef.keydownEvents().subscribe((event) => {
+            if (event.key === 'Escape' && !event.defaultPrevented) {
+                event.preventDefault();
+                this.close();
+            }
+        });
+        origin.setAttribute('aria-expanded', 'true');
+    }
+
+    showCategoriesPanel(): void {
+        this.close();
+        this.sidebarState.showCategories('portal');
+        // At phone widths the rail renders as the off-canvas context drawer,
+        // whose open state the fold level does not drive.
+        if (isPhoneViewport()) {
+            this.contextDrawer.open();
+        }
+    }
+
+    close(): void {
+        const overlayRef = this.overlayRef;
+        const origin = this.origin;
+        this.overlayRef = null;
+        this.origin = null;
+        origin?.setAttribute('aria-expanded', 'false');
+        overlayRef?.dispose();
+        // Focus returns to the trigger that opened the popover so keyboard
+        // users continue where they acted instead of dropping to <body> —
+        // unless that trigger sits in a rail that folded meanwhile; then the
+        // layout's own handoff picks focus up.
+        if (
+            origin &&
+            origin.isConnected &&
+            overlayRef &&
+            !origin.closest('[inert]')
+        ) {
+            origin.focus();
+        }
+    }
+}
+
+/** Same breakpoint as the shell's phone drawer styles (≤640px). */
+function isPhoneViewport(): boolean {
+    return (
+        typeof window !== 'undefined' &&
+        typeof window.matchMedia === 'function' &&
+        window.matchMedia('(max-width: 640px)').matches
+    );
+}

libs/workspace/shell/feature/src/lib/workspace-shell/components/workspace-shell-context-sidebar/workspace-shell-context-sidebar.component.html

@@ -31,10 +31,12 @@
     @if (context(); as context) {
         @if (section(); as section) {
             <aside
+                #routePanel
                 tabindex="-1"
                 cdkFocusInitial
                 class="context-panel context-panel--route"
                 [class.context-panel--collapsed]="isContextPanelCollapsed()"
+                [attr.inert]="isContextPanelInert() ? '' : null"
                 appResizable
                 [minWidth]="240"
                 [maxWidth]="560"
@@ -42,6 +44,7 @@
                 storageKey="sidebar-width"
             >
                 <app-workspace-context-panel
+                    #contextPanel
                     [context]="context"
                     [section]="section"
                 />

libs/workspace/shell/feature/src/lib/workspace-shell/components/workspace-shell-context-sidebar/workspace-shell-context-sidebar.component.scss

@@ -31,8 +31,11 @@
 .context-panel--collapsed {
     width: 0 !important;
     min-width: 0 !important;
-    padding-left: 0;
-    padding-right: 0;
+    // !important: the `--route` / `--sources` variants set their padding
+    // later in the cascade at equal specificity, and 22px of padding left a
+    // visible empty strip beside the channels rail while "collapsed".
+    padding-left: 0 !important;
+    padding-right: 0 !important;
     border-right-color: transparent;
 
     .resize-handle {

libs/workspace/shell/feature/src/lib/workspace-shell/components/workspace-shell-context-sidebar/workspace-shell-context-sidebar.component.spec.ts

@@ -1,13 +1,12 @@
-import {
-    Component,
-    Directive,
-    input,
-} from '@angular/core';
+import { Component, Directive, input, signal } from '@angular/core';
 import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { By } from '@angular/platform-browser';
 import { MatIcon } from '@angular/material/icon';
 import { TranslatePipe, TranslateService } from '@ngx-translate/core';
 import { of } from 'rxjs';
 import { LiveLayoutSidebarStateService } from '@iptvnator/portal/shared/util';
+import { StalkerStore } from '@iptvnator/portal/stalker/data-access';
+import { XtreamStore } from '@iptvnator/portal/xtream/data-access';
 import { WorkspaceShellContextSidebarComponent } from './workspace-shell-context-sidebar.component';
 import { WorkspaceShellContextDrawerService } from '@iptvnator/workspace/shell/util';
 
@@ -30,6 +29,7 @@ class MockResizableDirective {
 class MockWorkspaceContextPanelComponent {
     readonly context = input.required<unknown>();
     readonly section = input.required<string>();
+    readonly focusTarget = jest.fn<HTMLElement | null, []>(() => null);
 }
 
 @Component({
@@ -56,16 +56,30 @@ class MockWorkspaceSourcesFiltersPanelComponent {}
 describe('WorkspaceShellContextSidebarComponent', () => {
     let fixture: ComponentFixture<WorkspaceShellContextSidebarComponent>;
     let liveSidebarService: LiveLayoutSidebarStateService;
+    const xtreamSelectedCategoryId = signal<number | null>(1);
+    const stalkerSelectedCategoryId = signal<string | null>('7');
+    const drawerOpen = signal(false);
 
     beforeEach(async () => {
         localStorage.removeItem('live-sidebar-state:portal');
+        xtreamSelectedCategoryId.set(1);
+        stalkerSelectedCategoryId.set('7');
+        drawerOpen.set(false);
 
         await TestBed.configureTestingModule({
             imports: [WorkspaceShellContextSidebarComponent],
             providers: [
                 {
                     provide: WorkspaceShellContextDrawerService,
-                    useValue: { close: jest.fn() },
+                    useValue: { close: jest.fn(), isOpen: drawerOpen },
+                },
+                {
+                    provide: XtreamStore,
+                    useValue: { selectedCategoryId: xtreamSelectedCategoryId },
+                },
+                {
+                    provide: StalkerStore,
+                    useValue: { selectedCategoryId: stalkerSelectedCategoryId },
                 },
                 {
                     provide: TranslateService,
@@ -181,6 +195,100 @@ describe('WorkspaceShellContextSidebarComponent', () => {
             );
         });
 
+        it('folds the categories rail on the first level already (categories-hidden)', () => {
+            setupLiveCategory('live');
+
+            liveSidebarService.setState('portal', 'categories-hidden');
+            fixture.detectChanges();
+
+            const aside = fixture.nativeElement.querySelector(
+                'aside.context-panel--route'
+            );
+            expect(aside.classList.contains('context-panel--collapsed')).toBe(
+                true
+            );
+        });
+
+        it('keeps the rail on the live root (no selected category) at categories-hidden, since no channels rail exists to host the way back', () => {
+            xtreamSelectedCategoryId.set(null);
+            setupLiveCategory('live');
+
+            liveSidebarService.setState('portal', 'categories-hidden');
+            fixture.detectChanges();
+
+            const aside = fixture.nativeElement.querySelector(
+                'aside.context-panel--route'
+            );
+            expect(aside.classList.contains('context-panel--collapsed')).toBe(
+                false
+            );
+
+            // Player-only still folds it: the floating restore handle lives
+            // in the content area and stays reachable there.
+            liveSidebarService.setState('portal', 'collapsed');
+            fixture.detectChanges();
+            expect(aside.classList.contains('context-panel--collapsed')).toBe(
+                true
+            );
+        });
+
+        it('takes the folded rail out of the focus order with inert, except inside the open phone drawer', () => {
+            setupLiveCategory('live');
+            const aside = fixture.nativeElement.querySelector(
+                'aside.context-panel--route'
+            );
+
+            liveSidebarService.setState('portal', 'categories-hidden');
+            fixture.detectChanges();
+            expect(aside.hasAttribute('inert')).toBe(true);
+
+            drawerOpen.set(true);
+            fixture.detectChanges();
+            expect(aside.hasAttribute('inert')).toBe(false);
+
+            drawerOpen.set(false);
+            liveSidebarService.setState('portal', 'expanded');
+            fixture.detectChanges();
+            expect(aside.hasAttribute('inert')).toBe(false);
+        });
+
+        it('hands focus to the panel whenever the rail actually unfolds, including from player-only on the live root', async () => {
+            xtreamSelectedCategoryId.set(null);
+            liveSidebarService.setState('portal', 'categories-hidden');
+            setupLiveCategory('live');
+            const panel = fixture.debugElement.query(
+                By.directive(MockWorkspaceContextPanelComponent)
+            ).componentInstance as MockWorkspaceContextPanelComponent;
+
+            (document.activeElement as HTMLElement | null)?.blur();
+
+            // Root at categories-hidden: the rail is visible, no transition.
+            liveSidebarService.collapse('portal');
+            fixture.detectChanges();
+            liveSidebarService.expand('portal');
+            fixture.detectChanges();
+            await new Promise((resolve) => queueMicrotask(resolve));
+
+            // The panel offered no control (categories not loaded), so the
+            // rail itself takes focus.
+            expect(panel.focusTarget).toHaveBeenCalledTimes(1);
+            expect(document.activeElement).toBe(
+                fixture.nativeElement.querySelector('aside.context-panel--route')
+            );
+
+            const control = document.createElement('button');
+            fixture.nativeElement.appendChild(control);
+            panel.focusTarget.mockReturnValue(control);
+            (document.activeElement as HTMLElement | null)?.blur();
+            liveSidebarService.collapse('portal');
+            fixture.detectChanges();
+            liveSidebarService.expand('portal');
+            fixture.detectChanges();
+            await new Promise((resolve) => queueMicrotask(resolve));
+
+            expect(document.activeElement).toBe(control);
+        });
+
         it('also collapses on the Stalker itv section', () => {
             setupLiveCategory('itv');
 

libs/workspace/shell/feature/src/lib/workspace-shell/components/workspace-shell-context-sidebar/workspace-shell-context-sidebar.component.ts

@@ -2,16 +2,22 @@ import {
     ChangeDetectionStrategy,
     Component,
     computed,
+    effect,
+    ElementRef,
     inject,
     input,
+    viewChild,
 } from '@angular/core';
 import { MatIcon } from '@angular/material/icon';
 import { TranslatePipe } from '@ngx-translate/core';
 import { ResizableDirective } from '@iptvnator/ui/components';
 import {
+    focusIfFocusLost,
     LiveLayoutSidebarStateService,
     PortalRailSection,
 } from '@iptvnator/portal/shared/util';
+import { StalkerStore } from '@iptvnator/portal/stalker/data-access';
+import { XtreamStore } from '@iptvnator/portal/xtream/data-access';
 import {
     WorkspaceShellContextDrawerService,
     WorkspacePortalContext,
@@ -47,6 +53,8 @@ export class WorkspaceShellContextSidebarComponent {
     private readonly liveSidebarStateService = inject(
         LiveLayoutSidebarStateService
     );
+    private readonly xtreamStore = inject(XtreamStore);
+    private readonly stalkerStore = inject(StalkerStore);
     // Root-provided; optional keeps standalone unit tests light. Only relevant
     // when the sidebar renders as the phone drawer — the close button that
     // calls this is CSS-hidden above the phone breakpoint.
@@ -67,11 +75,82 @@ export class WorkspaceShellContextSidebarComponent {
             LIVE_SECTIONS.has(section)
         );
     });
+    /**
+     * A live category is selected, so the layout renders a channels rail
+     * whose header carries the way back to the folded categories rail (the
+     * category dropdown + show chevron). On the live root there is no such
+     * rail, and folding the categories there would leave no way back.
+     */
+    readonly hasLiveCategorySelection = computed(() => {
+        const provider = this.context()?.provider;
+        if (provider === 'xtreams') {
+            return this.xtreamStore.selectedCategoryId() !== null;
+        }
+        if (provider === 'stalker') {
+            return !!this.stalkerStore.selectedCategoryId();
+        }
+        return false;
+    });
+    // The categories rail is the outermost panel, so it folds on the first
+    // collapse level already (`categories-hidden`, gated on a channels rail
+    // existing to host the way back), and always on `collapsed`.
     readonly isContextPanelCollapsed = computed(
         () =>
             this.isLiveCategoryRoute() &&
-            this.liveSidebarStateService.isCollapsedFor('portal')()
+            (this.liveSidebarStateService.isCollapsedFor('portal')() ||
+                (this.liveSidebarStateService.areCategoriesHiddenFor(
+                    'portal'
+                )() &&
+                    this.hasLiveCategorySelection()))
     );
+    /**
+     * A folded rail is only 0px wide; its search, sort and category buttons
+     * would still take Tab stops and screen-reader focus. `inert` removes
+     * them from both. Not while the panel renders as the open phone drawer,
+     * whose stylesheet ignores the folded state.
+     */
+    readonly isContextPanelInert = computed(
+        () =>
+            this.isContextPanelCollapsed() && !this.contextDrawer?.isOpen()
+    );
+
+    // By template ref, not class token, so a spec's stand-in panel is found
+    // the same way the real one is.
+    private readonly contextPanel =
+        viewChild<Pick<WorkspaceContextPanelComponent, 'focusTarget'>>(
+            'contextPanel'
+        );
+    private readonly routePanel = viewChild('routePanel', {
+        read: ElementRef<HTMLElement>,
+    });
+
+    constructor() {
+        // Unfolding the rail removes the control the user activated (the
+        // layout's show-categories button or the floating restore handle),
+        // so focus drops to <body>; the rail picks it up once rendered. This
+        // watches the rail's ACTUAL fold state rather than the raw level:
+        // on the live root the rail stays visible at `categories-hidden`,
+        // and only `collapsed` ↔ visible is a real transition there. The
+        // panel names its control; with none rendered (categories loading,
+        // a failed load) the `tabindex="-1"` aside itself takes focus, so a
+        // keyboard user always lands inside the rail.
+        // Seeded on the first run: the required inputs are not readable in
+        // the constructor yet.
+        let wasCollapsed: boolean | null = null;
+        effect(() => {
+            const collapsed = this.isContextPanelCollapsed();
+            const unfolded = wasCollapsed === true && !collapsed;
+            wasCollapsed = collapsed;
+            if (unfolded) {
+                queueMicrotask(() =>
+                    focusIfFocusLost(
+                        this.contextPanel()?.focusTarget() ??
+                            this.routePanel()?.nativeElement
+                    )
+                );
+            }
+        });
+    }
 
     closeDrawer(): void {
         this.contextDrawer?.close();

libs/workspace/shell/feature/src/lib/workspace-shell/workspace-shell.component.ts

@@ -28,7 +28,9 @@ import { WorkspaceShellRouteStateService } from './services/workspace-shell-rout
 import { WorkspaceShellSearchSyncService } from './services/workspace-shell-search-sync.service';
 import { WorkspaceShellSearchService } from './services/workspace-shell-search.service';
 import { WorkspaceKeyboardShortcutsService } from '../workspace-keyboard-shortcuts/workspace-keyboard-shortcuts.service';
+import { WorkspaceLiveCategoriesPopoverService } from '../workspace-live-categories-popover/workspace-live-categories-popover.service';
 import { WorkspaceShellContextDrawerService } from '@iptvnator/workspace/shell/util';
+import { LIVE_CATEGORIES_POPOVER } from '@iptvnator/portal/shared/util';
 
 @Component({
     selector: 'app-workspace-shell',
@@ -55,6 +57,12 @@ import { WorkspaceShellContextDrawerService } from '@iptvnator/workspace/shell/u
         WorkspaceShellXtreamImportService,
         WorkspaceShellCommandPaletteService,
         WorkspaceKeyboardShortcutsService,
+        // The live layouts inside the router outlet open the folded categories
+        // rail through this token; see `LiveCategoriesPopover`.
+        {
+            provide: LIVE_CATEGORIES_POPOVER,
+            useClass: WorkspaceLiveCategoriesPopoverService,
+        },
     ],
 })
 export class WorkspaceShellComponent {