## 1. Implementation
- [x] 1.1 Update `generate_ppt` to create outline-backed placeholder PPT frames without queuing image tasks.
- [x] 1.2 Add a lightweight UI event bridge for opening the project drawer on PPT editor outline mode.
- [x] 1.3 Add PPT editor view toggle and outline prompt editing UI.
- [x] 1.4 Add selected-slide generation with serial previous-slide reference and parallel concurrency limit of 5.
- [x] 1.5 Add `generate_ppt` to main-thread workflow tool routing.
- [x] 1.6 Update the built-in PPT Skill copy.
- [x] 1.7 Run targeted validation.