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>

libs/api/tracker/presenters/src/lib/graphql/issue.resolver.ts

@@ -104,11 +104,18 @@ export class IssueResolver {
     categories: StatusCategory[] | undefined,
     @Args('limit', { type: () => Int, defaultValue: 50 }) limit: number,
     @Args('offset', { type: () => Int, defaultValue: 0 }) offset: number,
+    @Args('search', {
+      type: () => String,
+      nullable: true,
+      description: 'Matches key, title or description (global search)',
+    })
+    search?: string | null,
   ) {
     return this.issuesService.mine(me.id, {
       assignedToMe,
       statuses: statuses ?? undefined,
       categories: categories ?? undefined,
+      search: search ?? undefined,
       limit,
       offset,
     });