Update dashboard and Docker compose

DEV_GUIDE.md

@@ -59,7 +59,7 @@ The `./scripts/dev.sh` script provides comprehensive development automation:
 
 ### Docker Operations
 ```bash
-./scripts/dev.sh build           # Build Docker images
+./scripts/dev.sh build           # Build Docker images (bot + dashboard)
 ```
 
 ## 🐳 Development Services
@@ -76,6 +76,30 @@ When you run `./scripts/dev.sh up`, the following services are available:
 | Redis Commander | http://localhost:8081 | Redis administration |
 | MailHog | http://localhost:8025 | Email testing |
 
+## 🖥️ Dashboard Frontend
+
+The dashboard backend serves static assets from `dashboard/frontend/dist`.
+
+Build the static assets:
+```bash
+cd dashboard/frontend
+npm install
+npm run build
+```
+
+Or run the Vite dev server for UI iteration:
+```bash
+cd dashboard/frontend
+npm install
+npm run dev
+```
+
+The Vite dev server runs at `http://localhost:5173`.
+
+The Vite dev server proxies `/api` and `/auth` to `http://localhost:8000`. If you're
+using the Docker dev stack (dashboard at `http://localhost:8080`), either run the
+dashboard backend locally on port 8000 or update the proxy target.
+
 ## 🧪 Testing
 
 ### Running Tests
@@ -284,4 +308,4 @@ pytest tests/test_config.py::TestSettingsValidation::test_discord_token_validati
 
 ---
 
-Happy coding! 🎉
+Happy coding! 🎉