fix(HAI-074): add missing imports in triage.ts and executor.test.ts

- Add Static type import from pi-ai in triage.ts
- Add aiMergeTask import from merger.js in executor.test.ts
- Add WorktreePool import from worktree-pool.js in executor.test.ts

packages/engine/src/executor.test.ts

@@ -30,7 +30,8 @@ vi.mock("node:fs", () => ({
 import { TaskExecutor, buildExecutionPrompt } from "./executor.js";
 import { createHaiAgent } from "./pi.js";
 import { execSync } from "node:child_process";
-import { findWorktreeUser } from "./merger.js";
+import { findWorktreeUser, aiMergeTask } from "./merger.js";
+import { WorktreePool } from "./worktree-pool.js";
 import type { Column, Task, TaskDetail } from "@hai/core";
 
 const mockedCreateHaiAgent = vi.mocked(createHaiAgent);

packages/engine/src/triage.ts

@@ -1,6 +1,6 @@
 import type { TaskStore, Task, TaskDetail, TaskAttachment, Settings } from "@hai/core";
 import type { ImageContent } from "@mariozechner/pi-ai";
-import { Type } from "@mariozechner/pi-ai";
+import { Type, type Static } from "@mariozechner/pi-ai";
 import type { ToolDefinition } from "@mariozechner/pi-coding-agent";
 import { createHaiAgent } from "./pi.js";
 import type { AgentSemaphore } from "./concurrency.js";