- Refactor merger.js mock to use importOriginal and spread actual exports - Preserve aiMergeTask export while still mocking findWorktreeUser - Add missing listTasks mock to merger worktree pool integration test
- Refactor merger.js mock to use importOriginal and spread actual exports - Preserve aiMergeTask export while still mocking findWorktreeUser - Add missing listTasks mock to merger worktree pool integration test