fix(shell): keep Add Playlist reachable on Settings; fix dashboard e2e

Two Electron E2E regressions from this branch's redesigns:

1. Hiding the playlist switcher on /settings (a playlist-scoped control)
   also hid the global "Add playlist" button, which lives in the same
   header-actions block. A user configuring Settings before importing
   their first source had no way to add a playlist — and the settings /
   playlist-switcher E2E suites, which add a portal right after saving a
   setting, timed out waiting for the button. The Add Playlist button is
   a global action, so it now stays visible on Settings; only the
   per-playlist context shortcut and bulk actions are hidden there.

2. dashboard-activation.e2e.ts asserted on `dashboard-global-favorites-
   rail`, the mixed Favorites rail removed earlier in this branch. The
   test now targets the v0.22 rails: live favorites resolve through the
   favorites-first `dashboard-live-recent-rail`, and the played movie /
   series resolve through `dashboard-continue-watching-rail` (renamed
   from `dashboard-recently-watched-rail`). The movie-from-favorites
   assertion was dropped — that dashboard surface no longer exists; the
   favorites collection still has its own page-level coverage.

Verified locally: dashboard-activation, settings, and playlist-switcher
E2E specs all pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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

@@ -59,17 +59,22 @@
         </label>
     }
 
-    @if (!isSettingsRoute()) {
-        <div class="header-actions header-actions--leading">
-            <button
-                type="button"
-                mat-icon-button
-                (click)="onAddPlaylistRequested()"
-                [matTooltip]="'WORKSPACE.SHELL.ADD_PLAYLIST_ALL' | translate"
-                [attr.aria-label]="'WORKSPACE.SHELL.ADD_PLAYLIST' | translate"
-            >
-                <mat-icon>add</mat-icon>
-            </button>
+    <!-- The "Add playlist" button stays visible on /settings — adding a
+         playlist is a global action, not playlist-scoped, so it must
+         remain reachable (e.g. a fresh user configuring the app before
+         importing their first source). Only the per-playlist shortcut
+         and bulk actions are hidden on Settings. -->
+    <div class="header-actions header-actions--leading">
+        <button
+            type="button"
+            mat-icon-button
+            (click)="onAddPlaylistRequested()"
+            [matTooltip]="'WORKSPACE.SHELL.ADD_PLAYLIST_ALL' | translate"
+            [attr.aria-label]="'WORKSPACE.SHELL.ADD_PLAYLIST' | translate"
+        >
+            <mat-icon>add</mat-icon>
+        </button>
+        @if (!isSettingsRoute()) {
             @if (headerShortcut(); as action) {
                 <button
                     type="button"
@@ -95,8 +100,8 @@
                     <mat-icon>{{ bulk.icon }}</mat-icon>
                 </button>
             }
-        </div>
-    }
+        }
+    </div>
 
     @if (isElectron()) {
         <div class="header-actions header-actions--trailing">