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-pipeline.ts

@@ -0,0 +1,39 @@
+/**
+ * Pipeline Query Hooks
+ *
+ * React Query hooks for fetching pipeline configuration.
+ */
+
+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';
+import type { PipelineConfig } from '@/store/app-store';
+
+/**
+ * Fetch pipeline config for a project
+ *
+ * @param projectPath - Path to the project
+ * @returns Query result with pipeline config
+ *
+ * @example
+ * ```tsx
+ * const { data: pipelineConfig, isLoading } = usePipelineConfig(currentProject?.path);
+ * ```
+ */
+export function usePipelineConfig(projectPath: string | undefined) {
+  return useQuery({
+    queryKey: queryKeys.pipeline.config(projectPath ?? ''),
+    queryFn: async (): Promise<PipelineConfig | null> => {
+      if (!projectPath) throw new Error('No project path');
+      const api = getHttpApiClient();
+      const result = await api.pipeline.getConfig(projectPath);
+      if (!result.success) {
+        throw new Error(result.error || 'Failed to fetch pipeline config');
+      }
+      return result.config ?? null;
+    },
+    enabled: !!projectPath,
+    staleTime: STALE_TIMES.SETTINGS,
+  });
+}