docs(04-02): create Phase 5 implementation roadmap

Comprehensive roadmap with 9 preliminary plans, risk analysis, and success metrics.

Key insights:
- JamTrack 2.5-3x more complex than Backing Track
- 9 plans: Redux → Thunks → Component Core → Playback → Mixdown → Download UI → Modal → Errors → UAT
- High risks: download/sync state machine, native client race conditions, fqId bugs
- 5 critical decisions: popup mode, stem controls, error recovery, download cancellation, UAT threshold
- Testing strategy: unit tests for Redux, integration tests for flows, comprehensive UAT checklist
- Applies Phase 3 lessons: popup mode from start, race condition mitigation, performance built-in

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
This commit is contained in:
Nuwan 2026-01-14 22:27:22 +05:30
parent 2e5e30f8b1
commit 7d7aa9760d
1 changed files with 1030 additions and 0 deletions

File diff suppressed because it is too large Load Diff