Comprehensive plan with 6 chunks, each containing bite-sized TDD tasks:
- Chunk 1: Theme class and registry
- Chunk 2: Config integration
- Chunk 3: Render pipeline
- Chunk 4: Message gradient integration
- Chunk 5: Color picker UI
- Chunk 6: Integration and validation
Each step includes exact code, test commands, and expected output.
- Clarify boot messages use hardcoded green, not theme gradients
- Finalize all gradient ANSI color codes (no TBD)
- Add initialization guarantee for ACTIVE_THEME
- Resolve circular import risk with data-only themes.py
- Update theme ID naming to match menu labels
- Expand test strategy and mock approach
