platform: modularize api/gui, add docs-tests-web foundation, and refresh root config

selective-vpn-web/vite.config.ts

@@ -0,0 +1,25 @@
+import { defineConfig, loadEnv } from 'vite'
+import react from '@vitejs/plugin-react'
+
+export default defineConfig(({ mode }) => {
+  const env = loadEnv(mode, process.cwd(), '')
+  const target = (env.VITE_DEV_PROXY_TARGET || 'http://127.0.0.1:8080').trim()
+
+  return {
+    plugins: [react()],
+    server: {
+      host: '127.0.0.1',
+      port: 5173,
+      proxy: {
+        '/api': {
+          target,
+          changeOrigin: true,
+        },
+        '/healthz': {
+          target,
+          changeOrigin: true,
+        },
+      },
+    },
+  }
+})