Netzwerkanalyse in eigenständige App ausgelagert

- Router-Import und Einbindung entfernt
- Dashboard: Netzwerk-UI, CSS, JS-Referenzen entfernt
- Netzwerk-Sidebar-Sektion und network-view entfernt

src/main.py

@@ -332,7 +332,6 @@ from routers.notifications import router as notifications_router
 from routers.feedback import router as feedback_router
 from routers.public_api import router as public_api_router
 from routers.chat import router as chat_router
-from routers.network_analysis import router as network_analysis_router
 from routers.tutorial import router as tutorial_router
 
 app.include_router(auth_router)
@@ -342,7 +341,6 @@ app.include_router(notifications_router)
 app.include_router(feedback_router)
 app.include_router(public_api_router)
 app.include_router(chat_router, prefix="/api/chat")
-app.include_router(network_analysis_router)
 app.include_router(tutorial_router)