feat: global search and keyboard shortcuts

Ctrl/⌘ K (or /) opens a search over the projects and tickets of all my
projects, driven by the keyboard. g plus a letter moves between project
pages, c creates a ticket on the board, e edits the open ticket and ?
lists every shortcut. My work can now be searched by text through the API.

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

apps/web/src/app/app.ts

@@ -11,7 +11,10 @@ import { filter, map } from 'rxjs';
 import { AuthFacade } from '@task-stream/web/identity/application';
 import { UserMenuComponent } from '@task-stream/web/identity/presenters';
 import { AppShellComponent } from '@task-stream/web/shared/ui';
-import { NotificationsBell } from '@task-stream/web/tracker/presenters';
+import {
+  CommandPalette,
+  NotificationsBell,
+} from '@task-stream/web/tracker/presenters';
 
 @Component({
   selector: 'ts-root',
@@ -23,6 +26,7 @@ import { NotificationsBell } from '@task-stream/web/tracker/presenters';
     AppShellComponent,
     UserMenuComponent,
     NotificationsBell,
+    CommandPalette,
   ],
   template: `
     <ts-app-shell>
@@ -48,6 +52,7 @@ import { NotificationsBell } from '@task-stream/web/tracker/presenters';
       @if (auth.isAuthenticated()) {
         <!-- One projectable node per @if branch, or neither reaches the slot. -->
         <ng-container shellUser>
+          <ts-command-palette />
           <ts-notifications-bell />
           <ts-user-menu />
         </ng-container>