feat: Mission Control dashboard with sovereignty audit + scary path tests

Mission Control Dashboard:
- /swarm/mission-control page with real-time system status
- Sovereignty score display with visual progress bar
- Dependency health grid (Ollama, Redis, Lightning, SQLite)
- Recommendations based on dependency status
- Heartbeat monitor with tick counter
- System metrics: uptime, agents, tasks, sats earned

Health Endpoints:
- /health/sovereignty - Full sovereignty audit report
- /health/components - Component status and config

Tests (TDD approach):
- 11 Mission Control tests (all passing)
- 23 scary path tests for production scenarios
- Concurrent load, memory persistence, edge cases

Total: 525 tests passing

src/dashboard/templates/base.html

@@ -22,7 +22,8 @@
     </div>
     <div class="mc-header-right">
       <a href="/briefing" class="mc-test-link">BRIEFING</a>
-      <a href="/swarm/live" class="mc-test-link">SWARM</a>
+      <a href="/swarm/mission-control" class="mc-test-link">MISSION CONTROL</a>
+      <a href="/swarm/live" class="mc-test-link">SWARM LIVE</a>
       <a href="/marketplace/ui" class="mc-test-link">MARKET</a>
       <a href="/tools" class="mc-test-link">TOOLS</a>
       <a href="/mobile" class="mc-test-link">MOBILE</a>