docs(ui): document live panel ownership

.changes/ui-live-panel-toggles.md

@@ -0,0 +1,10 @@
+---
+type: feature
+area: ui
+issues: [1118]
+---
+
+Live TV now remembers Groups and Channels visibility independently across M3U,
+Xtream, Stalker, Favorites, and Recently Viewed. Consistent accessible controls
+restore each panel, while Cmd/Ctrl+B temporarily clears the viewing area
+without overwriting those choices. Guide toggles now appear only when usable.

CLAUDE.md

@@ -929,6 +929,23 @@ engine` (restart required) or
 - Keyboard shortcuts: ArrowUp/ArrowDown (volume), M (mute)
 - Component: `libs/ui/playback/src/lib/audio-player/audio-player.component.ts`
 
+**Live Panel Controls**:
+
+- Groups and Channels keep independent persisted intent through
+  `LiveLayoutPanelStateService` in `@iptvnator/portal/shared/data-access`;
+  missing new values migrate per panel from the legacy
+  `live-sidebar-state`.
+- M3U, Xtream, Stalker, Favorites, and Recently Viewed use the same
+  header-hide/boundary-restore pattern with retained `inert` panels, ARIA
+  relationships, focus transfer, and 40px minimum targets.
+- `Cmd/Ctrl+B` temporarily suppresses applicable left panels without changing
+  their saved combination. Responsive suppression also preserves intent and
+  omits unfulfillable restore controls.
+- Guide disclosure appears only beside a working inline player. External
+  MPV/VLC keeps a static EPG heading, and radio has no Guide panel.
+- Canonical UX and ownership contract:
+  `docs/architecture/iptvnator-ui-guidelines.md` ("Live Panel Disclosures").
+
 **EPG (Electronic Program Guide)**:
 
 - XMLTV format support

docs/architecture/iptvnator-ui-guidelines.md

@@ -214,48 +214,68 @@ remain local when the meaning is explicit.
 - Keep the EPG content mounted while collapsed so current-program state can
   continue updating.
 
-### Collapsible Live Sidebar
+### Live Panel Disclosures
 
-- M3U, Xtream, and Stalker live layouts share a single sidebar collapse toggle
-  that hides the channels rail to give the player and EPG full width.
-- Xtream Live TV's root view (`/live` with no selected category) follows the
-  same paginated `All Items` shell as VOD and Series: a widget header with the
-  total channel count, page-size controls, and page navigation above the shared
-  `app-grid-list`. Use the grid list's logo-oriented live variant so channel
-  logos stay contained in 16:9 thumbnails instead of being cropped like
-  VOD/series posters. Selecting a channel from that root grid starts playback,
-  selects the channel's category, highlights the active category and channel,
-  and scrolls the category rail plus virtual channels list to the selected rows
-  when those rails are visible.
-- In Xtream and Stalker live TV, the same toggle also collapses the workspace
-  shell context sidebar (the "Live Categories" rail rendered by
-  `WorkspaceShellContextSidebarComponent`), matching M3U's "everything quiets"
-  behaviour. The shell categories rail only collapses when the active section
-  is `live` (Xtream) or `itv`/`radio` (Stalker); movies, series, favorites,
-  and recent routes leave it untouched.
-- Collapsed state is owned by `LiveLayoutSidebarStateService`
-  (`providedIn: 'root'`) in `@iptvnator/portal/shared/util`. Every surface that
-  participates injects the service and reads `isCollapsed`; any toggle calls
-  `service.toggle()`. Persistence delegates to the existing
-  `live-sidebar-state` helpers, so the localStorage key stays unchanged and
-  missing/invalid values restore to expanded.
-- A `mat-icon-button` with `chevron_left` lives in the sidebar header and
-  toggles state. While collapsed, a floating `chevron_right` mini-fab appears
-  at the left edge of `.content-container` to restore the rail (and the
-  categories rail, in Xtream/Stalker live).
-- Keyboard shortcut: `Cmd/Ctrl+B`. The handler ignores events that originate
-  inside `<input>`, `<textarea>`, `<select>`, or content-editable elements via
-  the shared `isTypingInInput` helper.
-- The CSS class `.sidebar-collapsed` (channels rail) and
-  `.context-panel--collapsed` (workspace shell categories rail) both override
-  the inline width set by the `appResizable` directive with
-  `width: 0 !important; min-width: 0 !important`. The directive's persisted
-  width is preserved so uncollapsing restores the user's previous resized
-  width. Both rails share the same 180 ms width transition so motion stays in
-  lockstep.
-- Below 600 px viewport, the M3U layout's mobile bottom-drawer rule overrides
-  the desktop collapse to `height: 0` instead of `width: 0`, and the floating
-  restore handle is hidden.
+Live layouts treat Groups, Channels, and Guide as separate capabilities. Never
+derive one panel's visibility from another panel's state, and never render a
+disclosure control for an action the current layout cannot perform.
+
+| Panel    | Applicable surfaces                                                                     | UI owner                                         |
+| -------- | --------------------------------------------------------------------------------------- | ------------------------------------------------ |
+| Groups   | M3U Groups; Xtream Live TV; Stalker TV/Radio                                            | M3U groups view or the workspace context sidebar |
+| Channels | M3U All/Groups; selected Xtream/Stalker live category; Favorites/Recent live collection | The route's channel-list or collection header    |
+| Guide    | EPG timeline/list beside a working inline player                                        | `app-epg-timeline` or `app-epg-list-view`        |
+
+`LiveLayoutPanelStateService` in
+`@iptvnator/portal/shared/data-access` owns only persisted user intent for the
+two left panels:
+
+- `live-groups-panel-state`
+- `live-channels-panel-state`
+
+Both values are independently `expanded` or `collapsed`. On first use, each
+missing or invalid new value is seeded from a valid legacy
+`live-sidebar-state`; otherwise it defaults to expanded. Migration writes the
+new keys and never rewrites or removes the legacy key.
+
+Routes resolve effective visibility from intent plus local applicability,
+responsive suppression, and the service's non-persisted master suppression.
+That distinction is intentional: hiding a panel updates its own persisted
+intent, while `Cmd/Ctrl+B` temporarily suppresses all applicable left panels
+without overwriting either choice. Pressing the shortcut again restores the
+saved combination. A direct panel action clears master suppression and then
+applies the requested intent. Shortcut handlers ignore input, textarea,
+select, and content-editable targets.
+
+Disclosure controls follow one placement and accessibility contract:
+
+- Expanded panels put a labelled Hide action in their own header.
+- Collapsed panels put a labelled Show action on the boundary where the panel
+  will return. If Groups and Channels are both collapsed, the restore rails
+  stay in spatial panel order.
+- Favorites and Recently Viewed keep their single Channels action in the
+  collection header; do not duplicate it inside loading, empty, or zero-result
+  content.
+- The controlled panel stays mounted with `aria-hidden="true"` and `inert`
+  while effectively hidden. The control uses `aria-controls`,
+  `aria-expanded`, an action-oriented translated label, and a minimum 40px
+  target. Move focus to the corresponding restore/hide control after a direct
+  state change.
+- Loading, empty-category, and zero-search-results states keep every applicable
+  control operable. Applicability, not item count, decides whether a panel can
+  be disclosed.
+
+Responsive suppression must not manufacture no-op controls. The workspace
+Groups panel is suppressed at 1023px and below; the M3U Groups panel is
+suppressed below 600px. In both cases its persisted intent remains unchanged
+and no Groups restore control appears. The M3U Channels bottom drawer remains
+independently restorable on mobile.
+
+Guide disclosure is a separate EPG capability. It is interactive only beside a
+working inline player. External MPV/VLC layouts keep their full static EPG
+heading without a Guide toggle, and radio layouts render no Guide panel. This
+contract does not make the external-player right area content-aware; that is a
+separate layout concern.
 
 ### EPG Card
 

docs/superpowers/plans/2026-07-31-live-panel-toggle-consistency.md

@@ -656,14 +656,14 @@ git commit -m "feat(i18n): translate live panel controls"
 - Reuse: `apps/electron-backend-e2e/src/electron-test-fixtures.ts`
 - Reuse: `apps/electron-backend-e2e/src/portal-mock-fixtures.ts`
 
-- [ ] **Step 1: Write the M3U Electron flow**
+- [x] **Step 1: Write the M3U Electron flow**
 
 Import the mock M3U fixture, enter Groups, independently hide/restore Groups and
 Channels, verify focus/ARIA/inert/width reclamation, exercise `Control+B`, seed
 legacy storage before reload, and check the mobile Channels restore path at a
 narrow viewport.
 
-- [ ] **Step 2: Run the M3U test and verify RED if a gap remains**
+- [x] **Step 2: Run the M3U test and verify RED if a gap remains**
 
 ```bash
 pnpm nx run electron-backend-e2e:e2e-ci--src/live-panel-toggles.e2e.ts \
@@ -673,14 +673,14 @@ pnpm nx run electron-backend-e2e:e2e-ci--src/live-panel-toggles.e2e.ts \
 Expected after implementation: PASS. Any failure must identify a functional or
 layout gap before adding provider flows.
 
-- [ ] **Step 3: Add Xtream and Stalker flows**
+- [x] **Step 3: Add Xtream and Stalker flows**
 
 Use the existing mock-server add helpers. Verify root Groups-only placement,
 category Groups+Channels independence, persistence across navigation,
 Groups-then-Channels restore ordering, zero-search-result controls, and no
 Guide toggle for external player/radio.
 
-- [ ] **Step 4: Run the full atomized target**
+- [x] **Step 4: Run the full atomized target**
 
 ```bash
 pnpm nx run electron-backend-e2e:e2e-ci--src/live-panel-toggles.e2e.ts
@@ -688,7 +688,7 @@ pnpm nx run electron-backend-e2e:e2e-ci--src/live-panel-toggles.e2e.ts
 
 Expected: all `@live-panels` tests pass.
 
-- [ ] **Step 5: Lint and commit**
+- [x] **Step 5: Lint and commit**
 
 ```bash
 pnpm nx lint electron-backend-e2e
@@ -704,19 +704,19 @@ git commit -m "test(e2e): cover live panel toggles"
 - Modify: `CLAUDE.md`
 - Create: `.changes/ui-live-panel-toggles.md`
 
-- [ ] **Step 1: Replace the obsolete shared-sidebar documentation**
+- [x] **Step 1: Replace the obsolete shared-sidebar documentation**
 
 Document independent Groups/Channels storage keys, data-access ownership,
 intent versus effective state, boundary controls, master suppression,
 responsive Groups-first suppression, collection-header exception, and Guide
 capability. Preserve the channel-row responsive contract from #1312 verbatim.
 
-- [ ] **Step 2: Update `CLAUDE.md` where it describes live sidebar state**
+- [x] **Step 2: Update `CLAUDE.md` where it describes live sidebar state**
 
 Mirror the canonical names, service location, and shortcut semantics without
 adding the future content-aware right-region behavior.
 
-- [ ] **Step 3: Add the user-facing release note**
+- [x] **Step 3: Add the user-facing release note**
 
 ```md
 ---
@@ -730,7 +730,7 @@ reliable restore controls across providers and screen sizes, and hides Guide
 toggles when they cannot work.
 ```
 
-- [ ] **Step 4: Validate documentation and release note**
+- [x] **Step 4: Validate documentation and release note**
 
 ```bash
 git diff --check
@@ -739,7 +739,7 @@ pnpm run release:notes:validate
 
 Expected: both commands exit 0.
 
-- [ ] **Step 5: Commit**
+- [x] **Step 5: Commit**
 
 ```bash
 git add docs/architecture/iptvnator-ui-guidelines.md CLAUDE.md \