docs: rewrite roadmap to reflect current state, add post-work checklist to CLAUDE.md

Rewrote 03-DEVELOPMENT-ROADMAP.md — replaced outdated week-by-week format with
phase-based structure reflecting actual project state. Integrated all 13 open
GitHub issues into appropriate phases. Added "After Completing Work" checklist
to CLAUDE.md coding standards and roadmap/issues to quick reference table.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -345,6 +345,13 @@ navigate(`/trees/${newTree.id}/edit`)
 - Always create feature branch BEFORE committing: `git checkout -b feat/feature-name`
 - Large features: commit per phase with `npm run build` validation
 
+### After Completing Work
+When a feature, fix, or significant piece of work is finished and merged/committed:
+1. **Update `CURRENT-STATE.md`** — move completed items, update "In Progress" and "What's Next" sections
+2. **Update `03-DEVELOPMENT-ROADMAP.md`** — check off completed work, update phase status
+3. **Close related GitHub Issues** — use `gh issue close #N` for any issues resolved by the work
+4. **Update `CLAUDE.md`** if the work introduced new patterns, lessons learned, or changed project structure
+
 ---
 
 ## Deployment (Railway)
@@ -372,6 +379,8 @@ navigate(`/trees/${newTree.id}/edit`)
 |------|-------|
 | API Docs | http://localhost:8000/api/docs |
 | Detailed Status | [CURRENT-STATE.md](CURRENT-STATE.md) |
+| Development Roadmap | [03-DEVELOPMENT-ROADMAP.md](03-DEVELOPMENT-ROADMAP.md) |
+| GitHub Issues | `gh issue list --state open` |
 | Bugs & Fixes | [LESSONS-LEARNED.md](LESSONS-LEARNED.md) |
 | Feature Specs | [04-FEATURE-SPECIFICATIONS.md](04-FEATURE-SPECIFICATIONS.md) |
 | Design System | [docs/plans/Frontend/DESIGN_SYSTEM_GUIDE.md](docs/plans/Frontend/DESIGN_SYSTEM_GUIDE.md) |