feat(phase-30): add coverage snapshots, temporal comparison and auto re-testing (T-230 to T-232)

frontend/src/App.tsx

@@ -19,6 +19,7 @@ import ThreatActorsPage from "./pages/ThreatActorsPage";
 import ThreatActorDetailPage from "./pages/ThreatActorDetailPage";
 import CampaignsPage from "./pages/CampaignsPage";
 import CampaignDetailPage from "./pages/CampaignDetailPage";
+import ComparisonPage from "./pages/ComparisonPage";
 import Layout from "./components/Layout";
 import ProtectedRoute from "./components/ProtectedRoute";
 
@@ -58,6 +59,7 @@ export default function App() {
         <Route path="/threat-actors/:actorId" element={<ThreatActorDetailPage />} />
         <Route path="/campaigns" element={<CampaignsPage />} />
         <Route path="/campaigns/:campaignId" element={<CampaignDetailPage />} />
+        <Route path="/comparison" element={<ComparisonPage />} />
         <Route path="/compliance" element={<CompliancePage />} />
         <Route
           path="/system"