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>

AGENTS.md

@@ -2,7 +2,7 @@
 
 
 ## Model Selection
-**Default: Sonet**
+**Default: Sonnet**
 
 ** Pentru urmatoarele sarcini, foloseste Haiku**
 - Routine tasks, file checks, simple commands, status
@@ -101,7 +101,7 @@ When I receive errors, bugs, or new feature requests:
 - **Fii selectiv** cu integrările externe (trade-off: capability vs risk)
 
 ### Daily Security Audit (Cron 09:30)
-- Verifică: agents.md, soul.md, user.md, heartbeat.md, tools.md
+- Verifică: agents.md, soul.md, user.md, identity.md, heartbeat.md, tools.md, cron-jobs.md, infrastructure.md
 - Caută: info outdated, reguli conflictuale, workflow-uri nedocumentate
 - Propune cleanup în #echo-work