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>

dashboard/notes.html

@@ -696,6 +696,10 @@
                 <i data-lucide="file-text"></i>
                 <span>KB</span>
             </a>
+            <a href="/echo/habits.html" class="nav-item">
+                <i data-lucide="dumbbell"></i>
+                <span>Habits</span>
+            </a>
             <a href="/echo/files.html" class="nav-item">
                 <i data-lucide="folder"></i>
                 <span>Files</span>