feat: Hands Dashboard Routes and UI (Phase 3.6)

Add dashboard for managing autonomous Hands:

Routes (src/dashboard/routes/hands.py):
- GET /api/hands - List all Hands with status
- GET /api/hands/{name} - Get Hand details
- POST /api/hands/{name}/trigger - Manual trigger
- POST /api/hands/{name}/pause - Pause scheduled Hand
- POST /api/hands/{name}/resume - Resume paused Hand
- GET /api/approvals - List pending approvals
- POST /api/approvals/{id}/approve - Approve request
- POST /api/approvals/{id}/reject - Reject request
- GET /api/executions - List execution history

Templates:
- hands.html - Main dashboard page
- partials/hands_list.html - Active Hands list
- partials/approvals_list.html - Pending approvals
- partials/hand_executions.html - Execution history

Integration:
- Wired up in app.py
- Navigation links in base.html

src/dashboard/templates/base.html

@@ -41,6 +41,7 @@
       <a href="/router/status" class="mc-test-link">ROUTER</a>
       <a href="/self-modify/queue" class="mc-test-link">UPGRADES</a>
       <a href="/self-coding" class="mc-test-link">SELF-CODING</a>
+      <a href="/hands" class="mc-test-link">HANDS</a>
       <a href="/work-orders/queue" class="mc-test-link">WORK ORDERS</a>
       <a href="/creative/ui" class="mc-test-link">CREATIVE</a>
       <a href="/mobile" class="mc-test-link" title="Mobile-optimized view">MOBILE</a>
@@ -73,6 +74,7 @@
     <a href="/memory" class="mc-mobile-link">MEMORY</a>
     <a href="/work-orders/queue" class="mc-mobile-link">WORK ORDERS</a>
     <a href="/self-coding" class="mc-mobile-link">SELF-CODING</a>
+    <a href="/hands" class="mc-mobile-link">HANDS</a>
     <a href="/creative/ui" class="mc-mobile-link">CREATIVE</a>
     <a href="/voice/button" class="mc-mobile-link">VOICE</a>
     <a href="/mobile" class="mc-mobile-link">MOBILE</a>