Readiness Dashboard: System status before external pilots

- Shows all systems: API, Database, Storage, Upload, Mission, Map,
  Replay, AI Processing, Decision Pipeline
- Color-coded status: Green/Ready, Yellow/Partial, Red/Not Ready
- Version info: Environment, Version, Commit, Build time
- Exit criteria checklist for external pilots

Next: Deploy pilot environment

packages/ui/src/App.tsx

@@ -5,6 +5,7 @@ import MissionUpload from './pages/MissionUpload';
 import FieldConsole from './pages/FieldConsole';
 import HealthDashboard from './pages/HealthDashboard';
 import PilotChecklist from './pages/PilotChecklist';
+import ReadinessDashboard from './pages/ReadinessDashboard';
 
 function App() {
   return (
@@ -17,6 +18,7 @@ function App() {
           <Link to="/console">Field Console</Link>
           <Link to="/health">Health</Link>
           <Link to="/pilot">Pilot 001</Link>
+          <Link to="/readiness">Readiness</Link>
         </nav>
       </header>
 
@@ -27,6 +29,7 @@ function App() {
         <Route path="/console" element={<FieldConsole />} />
         <Route path="/health" element={<HealthDashboard />} />
         <Route path="/pilot" element={<PilotChecklist />} />
+        <Route path="/readiness" element={<ReadinessDashboard />} />
       </Routes>
     </div>
   );