Add mobile IP auto-discovery and fix hardcoded IPs

- Use Docker host network mode for automatic IP detection
- Add FastAPI startup event to display Mobile URL
- Change frontend API path from hardcoded IP to relative path

backend/main.py

@@ -75,6 +75,33 @@ app = FastAPI(
     version="1.0.0"
 )
 
+
+@app.on_event("startup")
+async def startup_event():
+    """Display server info on startup"""
+    import socket
+
+    print("\n" + "=" * 60)
+    print("DiaryML - Your Private Creative Companion")
+    print("=" * 60)
+
+    # Get local IP for mobile setup
+    try:
+        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        s.connect(("8.8.8.8", 80))
+        local_ip = s.getsockname()[0]
+        s.close()
+
+        print(f"\n  Desktop: http://localhost:8000")
+        print(f"  Mobile:  http://{local_ip}:8000/api")
+        print(f"\n  Enter the Mobile URL in your phone's DiaryML app")
+        print("=" * 60 + "\n")
+    except Exception as e:
+        print(f"\n  Desktop: http://localhost:8000")
+        print(f"  Mobile:  (Could not detect IP: {e})")
+        print("=" * 60 + "\n")
+
+
 # CORS middleware for local development
 app.add_middleware(
     CORSMiddleware,

docker-compose.yml

@@ -6,8 +6,7 @@ services:
       context: .
       dockerfile: Dockerfile
     container_name: diaryml
-    ports:
-      - "8000:8000"
+    network_mode: host
     volumes:
       # Persist database and data
       - ./diary.db:/app/diary.db

frontend/app.js

@@ -1,6 +1,7 @@
 // DiaryML Frontend - Vanilla JavaScript
 
-const API_BASE = 'http://192.168.0.123:8000/api';
+// Use relative path since frontend is served from same server
+const API_BASE = '/api';
 
 // State
 const state = {