[Juliusolsson05]

Summary

• add a cached main-process worktree activity index for Claude/Codex transcript-derived activity
• expose richer worktree Git status and activity summary IPC APIs
• add a Worktrees side bar showing worktree status, live agents, and last indexed agent activity

Notes

• transcript cache stores query-independent compact events and resolves them against the current repo worktree set at query time
• background activity refreshes are throttled so panel polling does not walk transcript trees on every poll

Verification

• npm run test:work-context
• npm run test:worktree-activity
• npm run build