iptvnator/docs/architecture/workspace-shell.md

# Workspace Shell

This document records the current workspace-first shell contract. It is the
stable replacement for the older UI refactor summary.

Related:

- [Workspace Dashboard](./workspace-dashboard.md)

## Summary

- `/workspace` is the primary app surface.
- `WorkspaceShellComponent` owns the persistent frame: rail, header, optional
  context panel, content outlet, and external playback footer.
- Descendant workspace pages inherit `layout = 'workspace'` from the
  `/workspace` root route.
- Provider route trees now bootstrap through route-scoped session providers
  instead of nested provider shell components.

Core implementation:

1. `apps/web/src/app/app.routes.ts`
2. `libs/workspace/shell/feature/src/lib/workspace-shell/workspace-shell.component.ts`
3. `libs/workspace/shell/feature/src/lib/workspace-shell/workspace-shell.component.html`
4. `libs/workspace/shell/feature/src/lib/workspace-shell/services/workspace-shell.facade.ts`
5. `libs/workspace/shell/feature/src/lib/workspace-shell/services/workspace-shell-route-state.service.ts`
6. `libs/workspace/shell/feature/src/lib/workspace-shell/services/workspace-shell-search.service.ts`
7. `libs/workspace/shell/feature/src/lib/workspace-shell/services/workspace-shell-search-sync.service.ts`
8. `libs/workspace/shell/feature/src/lib/workspace-shell/services/workspace-shell-header.service.ts`
9. `libs/workspace/shell/feature/src/lib/workspace-shell/services/workspace-shell-command-palette.service.ts`
10. `libs/workspace/shell/feature/src/lib/workspace-shell/services/workspace-shell-xtream-import.service.ts`
11. `libs/portal/shared/util/src/lib/navigation/portal-route.utils.ts`
12. `libs/portal/shared/util/src/lib/navigation/portal-rail-links.ts`
13. `libs/portal/shared/ui/src/lib/navigation/portal-rail-links.component.ts`

## Route Contract

Current workspace routes:

1. `/` -> `/workspace`
2. `/workspace` -> `/workspace/dashboard`
3. `/workspace/dashboard`
4. `/workspace/sources`
5. `/workspace/playlists/:id/:view`
6. `/workspace/global-favorites`
7. `/workspace/global-recent`
8. `/workspace/search`
9. `/workspace/downloads`
10. `/workspace/settings`
11. `/workspace/xtreams/:id/...`
12. `/workspace/stalker/:id/...`

Compatibility redirect:

1. `/settings` -> `/workspace/settings`

Provider route integration:

1. `apps/web/src/app/app.routes.ts` marks the `/workspace` root route with
   `data.layout = 'workspace'`.
2. `isWorkspaceLayoutRoute(...)` treats that layout marker as inherited route
   state for all descendants.
3. Xtream and Stalker parent routes attach route-scoped session providers that
   bootstrap the active playlist, sync provider section state, and clean up
   provider-local state when the route is destroyed.
4. Xtream route bootstrap is DB-first for already imported Electron playlists:
   if the requested section has persisted categories and content, the route
   hydrates from SQLite even when the portal status probe reports unavailable,
   expired, or inactive. Fresh/no-cache Xtream routes still use the status probe
   to block remote imports before the loading overlay starts.
5. Workspace routes no longer rely on nested provider shell components for
   hidden local chrome.

## Shell Structure

The shell is intentionally split into four persistent regions:

1. Left rail:
    1. Static workspace links for dashboard, sources, global favorites, and
       recently viewed. The routed global-search rail link is Electron-only
       because its data source is the SQLite worker bridge.
    2. Provider-aware context links derived from the active or current playlist.
    3. Settings remains a persistent footer shortcut in the rail.
2. Top header:
    1. Playlist switcher.
    2. Route-aware search input and command palette trigger.
    3. Add source action.
    4. Optional playlist refresh and route-specific shortcut actions.
    5. Downloads shortcut in Electron.
3. Main body:
    1. Optional left context panel.
    2. Main router outlet content.
4. Optional footer:
    1. External playback session bar when a docked session is visible.

`WorkspaceShellComponent` binds only to `WorkspaceShellFacade`. The facade is
kept as a thin template-facing API and delegates ownership to component-scoped
services:

1. `WorkspaceShellRouteStateService` owns current route parsing, rail links,
   context-panel state, dashboard startup preference, and playlist source
   signals.
2. `WorkspaceShellSearchService` owns the route-aware header search capability
   and public search actions.
3. `WorkspaceShellSearchSyncService` owns the search query signals, debounced
   application, provider-store synchronization, and query-param sync.
4. `WorkspaceShellHeaderService` owns playlist title/subtitle, account/info
   actions, refresh action state, and recent-items bulk cleanup.
5. `WorkspaceShellCommandPaletteService` owns command-palette dialog lifecycle
   and recent-command recording.
6. `WorkspaceShellXtreamImportService` owns Xtream import/refresh overlay
   state and labels.

When adding shell behavior, prefer placing it in the service that owns the
nearest existing state. Keep `WorkspaceShellFacade` as a stable re-export layer
for the template unless the template contract itself intentionally changes.

## Context Panel Rules

The shell decides which secondary panel to show from the current route:

1. `/workspace/sources`
    1. `WorkspaceSourcesFiltersPanelComponent`
2. Xtream category sections (`live`, `vod`, `series`)
    1. `WorkspaceContextPanelComponent`
3. Stalker category sections (`itv`, `radio`, `vod`, `series`)
    1. `WorkspaceContextPanelComponent`
4. `/workspace/settings`
    1. `WorkspaceSettingsContextPanelComponent`
5. Downloads sections
    1. `WorkspaceCollectionContextPanelComponent`

The context panel is part of the shell contract. New workspace-level routes
should explicitly decide whether they need one rather than adding local
sidebars inside feature pages.

Xtream and Stalker category panels preserve provider/server category order by
default. The panel header exposes a sort menu next to category search with
`Server sorting`, `A-Z`, and `Z-A`; when alphabetical sorting is active,
synthetic "all categories" entries stay pinned before sorted provider
categories.

## Search And Navigation Rules

Search is shell-owned and route-aware:

1. Disabled on settings routes.
2. Enabled on sources routes.
3. Enabled for `/workspace/search`, which is the Electron-only routed
   global-search view. `Ctrl/Cmd+F` in Electron opens this route and
   focuses/selects the header search input instead of opening a fullscreen
   dialog.
4. Enabled for supported Xtream and Stalker content/search views.
5. Placeholder text and search handling vary by provider and section.
6. Input changes are debounced before route/store updates are applied.
7. Global search uses the header input as its primary input and writes the
   search phrase to the `q` query parameter, so history/back-forward behavior
   matches the rest of the workspace.

Rail navigation is also shell-owned:

1. Workspace-global entries are static.
2. Provider entries come from `buildPortalRailLinks(...)`.
3. On dashboard, sources, settings, global search, global favorites, and global
   recent, the shell falls back to the currently selected playlist so provider
   navigation remains available even outside a provider route.

Command palette behavior is shell-owned but view-extensible:

1. The shell resolves commands into three groups in fixed order: current view,
   this playlist, then global.
2. Shell-owned commands are derived from route context and current playlist
   state; empty groups are omitted instead of rendering disabled placeholders.
3. Workspace features contribute current-view commands through
   `WorkspaceViewCommandService`.
4. Header shortcut actions can opt into palette exposure by attaching palette
   metadata through `WorkspaceHeaderContextService`.
5. Filtering matches command labels, descriptions, and keywords, and keyboard
   selection always lands on the first enabled command.
6. A "Recently used" section is rendered above the standard groups when the
   query is empty and at least one stored id resolves to a visible+enabled
   command; ids are persisted via `RecentCommandsService` (capped at 5,
   stored at `STORE_KEY.RecentCommands`). Storage is **not** pruned by route
   visibility — a navigation command like `Open sources` is invisible while
   the user is on `/workspace/sources` but the id stays in storage so it
   reappears in the recent section after navigating away.
7. Five "Switch player to X" commands are registered globally by
   `WorkspacePlayerCommandsContributor`. The MPV/VLC entries are visible only
   in Electron, and the entry matching the current `SettingsStore.player()`
   value is disabled. The new player setting applies to the next playback
   session; an existing stream is not re-mounted.

Keyboard shortcut help is shell-owned:

1. `WorkspaceKeyboardShortcutsService` is provided by `WorkspaceShellComponent`.
   It owns the workspace-scoped `document:keydown` listener for `?` /
   `Shift+/`.
2. The listener ignores events from inputs, textareas, selects, and
   content-editable elements via `isTypingInInput(...)`.
3. `libs/portal/shared/util/src/lib/keyboard-shortcut-definitions.ts` is the
   metadata registry for shortcuts shown in the help dialog and documented in
   README. `keyboard-shortcuts.ts` owns the display transformation and help
   trigger detection.
   Shortcuts that only work through the Electron bridge, such as embedded MPV
   controls, must set `electronOnly: true` so the PWA dialog does not advertise
   unavailable commands.
4. New custom shortcuts should be added to that registry when the handler is
   added. Do not include native browser/editor behavior such as `Tab` or
   platform text editing shortcuts.

## Window Chrome And Custom Title Bar

The Electron window hides the native title bar on all desktop platforms
(`titleBarStyle: 'hidden'` in `apps/electron-backend/src/app/app.ts`):

1. macOS keeps the native traffic lights (`titleBarOverlay: true`,
   `trafficLightPosition`); the renderer draws no window buttons.
2. Windows and Linux use renderer-drawn window controls
   (`app-window-controls`, `libs/ui/components/src/lib/window-controls/`).
   `frame` is intentionally left untouched so native resize borders and
   window snapping keep working.

The controls are mounted once in `app-root` (not inside the workspace
header) as a `position: fixed` top-right overlay so they stay clickable
above full-window content such as the multi-EPG cdk overlay and Material
dialog backdrops — the same behavior as the macOS traffic lights. Because
CDK overlays render as popovers in the browser top layer (above any
z-index), the component host is itself a `popover="manual"` element: it
enters the top layer on init and re-enters it (hide + show) whenever
another popover opens, so the controls always paint last. The
`z-index: 10000` remains only as a fallback when the popover API is
unavailable. They render only when
`RuntimeCapabilitiesService.usesCustomWindowControls` is true (Windows/Linux
Electron with the window-control bridge methods available); the PWA and
macOS never mount them.

IPC contract (constants in `libs/shared/interfaces/src/lib/ipc-commands.ts`,
handlers in `apps/electron-backend/src/app/events/window.events.ts`):

1. `WINDOW:MINIMIZE`, `WINDOW:TOGGLE_MAXIMIZE`, `WINDOW:CLOSE`,
   `WINDOW:GET_STATE` are `ipcMain.handle` channels resolved from the sender
   WebContents. Close goes through `win.close()` so the existing
   window-bounds persistence in `app.ts` still runs.
2. `WINDOW:STATE_CHANGED` is pushed main → renderer on
   maximize/unmaximize/enter-full-screen/leave-full-screen so the
   maximize/restore glyph stays correct for externally triggered changes
   (double-click on a drag region, OS snap, F11). The controls hide
   themselves while the window is fullscreen.

Layout integration:

1. `document.body` gets a `frameless-platform` class (set in
   `AppComponent`, same mechanism as `dark-theme`) — body-level so rules
   also reach cdk-overlay content rendered outside `app-root`.
2. `apps/web/src/styles.scss` reserves `padding-right: 150px` in
   top-aligned drag regions (`.workspace-header`, multi-EPG
   `#epg-navigation`) for the 3 × 46px button strip.
3. Button colors follow the theme via CSS variables (`--app-on-surface`,
   `--app-hover-overlay`); the close button uses the Windows-style red
   hover (`#e81123`). No theme IPC is involved.

Window decorations on Linux (shadows, corners):

1. Hiding the title bar removes the window manager's decorations, so the
   shadow/rounded corners must come from client-side decorations (CSD).
   Electron only draws CSD on native Wayland, and frameless-window CSD
   (GTK drop shadow + extended resize boundaries, `hasShadow: true` by
   default) requires **Electron >= 41** — the reason the dependency was
   bumped from 39. Electron picks Wayland automatically on Wayland
   sessions since 38.2.
2. On X11 sessions frameless windows stay undecorated (square, no
   shadow) — an upstream platform limitation shared by e.g. VS Code.
3. Rounded corners for frameless Linux windows are not yet supported by
   Electron (tracked upstream as planned work); Windows 11 keeps its DWM
   rounded corners and shadow because the standard frame is retained.

Toolchain notes for the Electron 41 upgrade:

1. `better-sqlite3` is pinned to exactly `12.9.0` — the last release that
   ships prebuilt binaries for BOTH Node 20 (ABI 115, used by Jest) and
   Electron 41 (ABI 145, used at runtime). `12.10.0` dropped the Node 20
   prebuilds, which forces a from-source build that fails on machines
   without a C++ toolchain.
2. The pnpm override `node-abi@3.85.0 -> 3.92.0` is required so
   `@electron/rebuild` (via `electron-builder install-app-deps`) can map
   Electron 41 to its ABI.

Known caveats:

1. DIY buttons cannot show the Windows 11 Snap Layouts flyout (only native
   caption buttons or the Window Controls Overlay get that).
2. Double-click-to-maximize on drag regions is handled natively by
   Electron/Chromium; on Linux the exact behavior depends on the window
   manager.

## Maintenance Guidance

Use this document as the source of truth when changing workspace shell behavior.

1. New top-level user destinations should default to child routes under
   `/workspace`.
2. Shared provider navigation logic belongs in portal-shared util/UI libraries,
   not duplicated inside the shell.
3. If a provider route changes how playlist/session bootstrap works, update the
   route-session provider and shell-facing route contract together.
4. When adding a non-native keyboard shortcut, update the shared shortcuts
   registry, the help dialog tests, README, and the closest behavior test.
5. Historical migration notes, cleanup lists, and one-off refactor steps should
   stay out of this file; track them in issues or PR notes instead.