feat: habit tracker with gamification + KB updates

Merge feature/habit-tracker into master (squashed):

✨ Habit Tracker Features:
- Bead chain visualization (30-day history)
- Weekly lives recovery system (+1 life/week)
- Lucide icons (zap, shield) replacing emoji
- Responsive layout (mobile-optimized)
- Navigation links added to all dashboard pages

📚 Knowledge Base:
- 40+ trading basics articles with metadata
- Daily notes (2026-02-10, 2026-02-11)
- Health & insights content
- KB index restructuring

🧪 Tests:
- Comprehensive test suite (4 test files)
- Integration tests for lives recovery
- 28/29 tests passing

Commits squashed:
- feat(habits): bead chain visualization + weekly lives recovery + nav integration
- docs(memory): update KB content + daily notes
- chore(data): update habits and status data

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitignore

@@ -31,3 +31,6 @@ tools/anaf-monitor/versions.json
 tools/anaf-monitor/snapshots/
 tools/anaf-monitor/monitor.log
 workspace/
+
+# Claude Code session handoff
+.claude/HANDOFF.md