fixes that made it work

mock_server.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+"""Mock WebSocket server that sends randomized Pi stats every 2 seconds."""
+
+import asyncio
+import json
+import random
+import time
+
+import websockets
+
+
+def generate_stats():
+    services = [
+        {"name": "docker", "status": random.choice(["running", "running", "running", "stopped"])},
+        {"name": "pihole", "status": random.choice(["running", "running", "running", "stopped"])},
+        {"name": "nginx", "status": random.choice(["running", "running", "stopped"])},
+        {"name": "sshd", "status": "running"},
+    ]
+    return {
+        "cpu_pct": round(random.uniform(5, 95), 1),
+        "mem_pct": round(random.uniform(30, 85), 1),
+        "mem_used_mb": random.randint(512, 3200),
+        "disk_pct": round(random.uniform(20, 80), 1),
+        "cpu_temp": round(random.uniform(35, 78), 1),
+        "uptime_hrs": round(random.uniform(1, 2000), 1),
+        "net_rx_kbps": round(random.uniform(0, 5000), 1),
+        "net_tx_kbps": round(random.uniform(0, 2000), 1),
+        "services": services,
+        "timestamp": int(time.time()),
+    }
+
+
+async def handler(websocket):
+    addr = websocket.remote_address
+    print(f"Client connected: {addr}")
+    try:
+        while True:
+            stats = generate_stats()
+            await websocket.send(json.dumps(stats))
+            await asyncio.sleep(2)
+    except websockets.ConnectionClosed:
+        print(f"Client disconnected: {addr}")
+
+
+async def main():
+    print("Mock Pi stats server starting on ws://0.0.0.0:8765")
+    async with websockets.serve(handler, "0.0.0.0", 8765):
+        await asyncio.Future()  # run forever
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

requirements.txt

@@ -0,0 +1 @@
+websockets>=12.0