Claude Code: fix GET / route to return simple JSON for stability

app.py

@@ -199,9 +199,15 @@ def get_brain_response(message: str) -> str:
     return handle_brain_response(message)
 
 
-@app.get("/", response_class=FileResponse)
+@app.get("/")
 async def root():
-    """Root endpoint serving the dashboard."""
+    """Root endpoint - simple health check."""
+    return {"message": "Cain is running"}
+
+
+@app.get("/dashboard", response_class=FileResponse)
+async def dashboard():
+    """Dashboard endpoint serving the UI."""
     index_path = f"{static_dir}/index.html"
     if os.path.exists(index_path):
         return FileResponse(index_path)