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/application/src/lib/ports/find-issues.repository.ts

@@ -43,6 +43,7 @@ export interface CrossProjectIssueFilter {
   assigneeId?: string;
   statuses?: string[];
   categories?: StatusCategory[];
+  search?: string;
   limit: number;
   offset: number;
 }

libs/api/tracker/application/src/lib/queries/search-my-issues.query-handler.ts

@@ -21,6 +21,7 @@ export class SearchMyIssuesQueryHandler
       assigneeId: query.filter.assignedToMe ? query.viewerId : undefined,
       statuses: query.filter.statuses,
       categories: query.filter.categories,
+      search: query.filter.search?.trim().slice(0, 200) || undefined,
       limit: Math.min(query.filter.limit, 200),
       offset: query.filter.offset,
     });

libs/api/tracker/application/src/lib/queries/search-my-issues.query.ts

@@ -11,6 +11,8 @@ export interface MyIssuesFilter {
   statuses?: string[];
   /** e.g. TODO + IN_PROGRESS + QA = still open, whatever the project calls them. */
   categories?: StatusCategory[];
+  /** Matches key, title or description. */
+  search?: string;
   limit: number;
   offset: number;
 }