feat(graph-explorer): implement interactive code relationship visualization with Cytoscape.js

- Added main render function to initialize the graph explorer view.
- Implemented data loading functions for graph nodes, edges, and search process data.
- Created UI layout with tabs for graph view and search process view.
- Developed filtering options for nodes and edges with corresponding UI elements.
- Integrated Cytoscape.js for graph visualization, including node and edge styling.
- Added functionality for node selection and details display.
- Implemented impact analysis feature with modal display for results.
- Included utility functions for refreshing data and managing UI states.

ccw/src/core/server.ts

@@ -11,6 +11,7 @@ import { handleMemoryRoutes } from './routes/memory-routes.js';
 import { handleMcpRoutes } from './routes/mcp-routes.js';
 import { handleHooksRoutes } from './routes/hooks-routes.js';
 import { handleCodexLensRoutes } from './routes/codexlens-routes.js';
+import { handleGraphRoutes } from './routes/graph-routes.js';
 import { handleSystemRoutes } from './routes/system-routes.js';
 import { handleFilesRoutes } from './routes/files-routes.js';
 import { handleSkillsRoutes } from './routes/skills-routes.js';
@@ -270,6 +271,11 @@ export async function startServer(options: ServerOptions = {}): Promise<http.Ser
         if (await handleCodexLensRoutes(routeContext)) return;
       }
 
+      // Graph routes (/api/graph/*)
+      if (pathname.startsWith('/api/graph/')) {
+        if (await handleGraphRoutes(routeContext)) return;
+      }
+
       // CCW routes (/api/ccw/*)
       if (pathname.startsWith('/api/ccw/')) {
         if (await handleCcwRoutes(routeContext)) return;