feat(frontend): replace Topology/Flow tabs with interactive Code Graph treemap

Reviewed and approved by Principal Engineer. All blocking issues resolved:
- Stale cytoscape vendor chunks deleted
- Dead Topology/Flow API methods and types removed
- @radix-ui/react-tabs dead dependency removed

Co-Authored-By: Paperclip <noreply@paperclip.ing>

Author: aksOps

src/main/frontend/package-lock.json

@@ -14,11 +14,10 @@
     "@radix-ui/react-dropdown-menu": "^2.1.6",
     "@radix-ui/react-scroll-area": "^1.2.3",
     "@radix-ui/react-select": "^2.1.6",
-    "@radix-ui/react-tabs": "^1.1.3",
     "@radix-ui/react-tooltip": "^1.1.8",
+    "@types/d3": "^7.4.3",
     "clsx": "^2.1.1",
-    "cytoscape": "^3.30.4",
-    "cytoscape-dagre": "^2.5.0",
+    "d3": "^7.9.0",
     "lucide-react": "^0.474.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
@@ -30,7 +29,6 @@
     "dompurify": "^3.3.3"
   },
   "devDependencies": {
-    "@types/cytoscape": "^3.21.9",
     "@types/react": "^18.3.18",
     "@types/react-dom": "^18.3.5",
     "@types/swagger-ui-react": "^4.18.3",

src/main/frontend/package.json

@@ -1,9 +1,8 @@
 import { Routes, Route, Navigate } from 'react-router-dom';
 import Layout from './components/Layout';
 import Dashboard from './components/Dashboard';
-import TopologyView from './components/TopologyView';
+import CodeGraphView from './components/CodeGraphView';
 import ExplorerView from './components/ExplorerView';
-import FlowView from './components/FlowView';
 import McpConsole from './components/McpConsole';
 import SwaggerView from './components/SwaggerView';
 
@@ -12,10 +11,9 @@ export default function App() {
     <Routes>
       <Route element={<Layout />}>
         <Route path="/" element={<Dashboard />} />
-        <Route path="/topology" element={<TopologyView />} />
+        <Route path="/graph" element={<CodeGraphView />} />
         <Route path="/explorer" element={<ExplorerView />} />
         <Route path="/explorer/:kind" element={<ExplorerView />} />
-        <Route path="/flow" element={<FlowView />} />
         <Route path="/console" element={<McpConsole />} />
         <Route path="/api-docs" element={<SwaggerView />} />
         <Route path="*" element={<Navigate to="/" replace />} />