Extension Platform: API server + React dashboard

- Python API server with Gitea-based build (no local files needed)
- PostgreSQL on Coolify internal network
- React + Vite + Tailwind dashboard
- Endpoints: /publish, /deploy, /deploy-all, /api/*
- Dockerfile: multi-stage (Node build + Python runtime)

dashboard/vite.config.js

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+import tailwindcss from '@tailwindcss/vite'
+
+export default defineConfig({
+  plugins: [react(), tailwindcss()],
+})