1. Install dependencies:

   pip install -r requirements.txt

2. Run the app:

   python app.py

3. Access from LAN:

   • Open browser on any device in the same LAN.
   • Go to: http://<host-ip>:5000/ (host IP is shown in the terminal and login page)

• Real-time chat (public, private, group)
• File sharing (PDF, images, videos, docs, etc.)
• Online users panel
• Message history
• Responsive UI (Bootstrap 5)

• All uploaded files are saved in static/uploads/

• SQLite file: chat.db (auto-created)

Note:

• No password required, just username.
• All data stays on your LAN, no internet needed.