feat(ui): add React Query hooks for data fetching

- Add useFeatures, useFeature, useAgentOutput for feature data
- Add useGitHubIssues, useGitHubPRs, useGitHubValidations, useGitHubIssueComments
- Add useClaudeUsage, useCodexUsage with polling intervals
- Add useRunningAgents, useRunningAgentsCount
- Add useWorktrees, useWorktreeInfo, useWorktreeStatus, useWorktreeDiffs
- Add useGlobalSettings, useProjectSettings, useCredentials
- Add useAvailableModels, useCodexModels, useOpencodeModels
- Add useSessions, useSessionHistory, useSessionQueue
- Add useIdeationPrompts, useIdeas
- Add CLI status queries (claude, cursor, codex, opencode, github)
- Add useCursorPermissionsQuery, useWorkspaceDirectories
- Add usePipelineConfig, useSpecFile, useSpecRegenerationStatus

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/ui/src/hooks/queries/use-workspace.ts

@@ -0,0 +1,42 @@
+/**
+ * Workspace Query Hooks
+ *
+ * React Query hooks for workspace operations.
+ */
+
+import { useQuery } from '@tanstack/react-query';
+import { getHttpApiClient } from '@/lib/http-api-client';
+import { queryKeys } from '@/lib/query-keys';
+import { STALE_TIMES } from '@/lib/query-client';
+
+interface WorkspaceDirectory {
+  name: string;
+  path: string;
+}
+
+/**
+ * Fetch workspace directories
+ *
+ * @param enabled - Whether to enable the query
+ * @returns Query result with directories
+ *
+ * @example
+ * ```tsx
+ * const { data: directories, isLoading, error } = useWorkspaceDirectories(open);
+ * ```
+ */
+export function useWorkspaceDirectories(enabled = true) {
+  return useQuery({
+    queryKey: queryKeys.workspace.directories(),
+    queryFn: async (): Promise<WorkspaceDirectory[]> => {
+      const api = getHttpApiClient();
+      const result = await api.workspace.getDirectories();
+      if (!result.success) {
+        throw new Error(result.error || 'Failed to load directories');
+      }
+      return result.directories ?? [];
+    },
+    enabled,
+    staleTime: STALE_TIMES.SETTINGS,
+  });
+}