Implementation Plan: Encapsulate AppController Status\n\n## Phase 1: Execution\n- [ ] Task: Add private _ai_status and _mma_status to AppController.init\n- [ ] Task: Implement @property and @setter for ai_status and mma_status\n- [ ] Task: Replace all legacy _set_status calls with direct property assignment\n- [ ] Task: Run full test suite\n- [ ] Conductor - User Manual Verification (Protocol in workflow.md)\n
