chore: snapshot workflow migration progress

frontend/vite.config.ts

@@ -3,6 +3,44 @@ import react from '@vitejs/plugin-react'
 
 export default defineConfig({
   plugins: [react()],
+  build: {
+    // The CAD viewer is route-lazy, but Three ships a monolithic ESM build.
+    // Keep the 3D stack split into cacheable vendor chunks and only relax
+    // the warning threshold enough to avoid a false positive on three-core.
+    chunkSizeWarningLimit: 750,
+    rollupOptions: {
+      output: {
+        manualChunks(id) {
+          if (!id.includes('node_modules')) return undefined
+
+          if (id.includes('three/build/three.module.js')) {
+            return 'three-core'
+          }
+
+          if (
+            id.includes('@react-three/fiber') ||
+            id.includes('react-reconciler') ||
+            id.includes('scheduler') ||
+            id.includes('its-fine') ||
+            id.includes('react-use-measure') ||
+            id.includes('suspend-react')
+          ) {
+            return 'react-three-fiber'
+          }
+
+          if (
+            id.includes('@react-three/drei') ||
+            id.includes('three-stdlib') ||
+            id.includes('@monogrid/gainmap-js')
+          ) {
+            return 'react-three-helpers'
+          }
+
+          return undefined
+        },
+      },
+    },
+  },
   server: {
     host: '0.0.0.0',
     port: 5173,
@@ -10,6 +48,7 @@ export default defineConfig({
       '/api': {
         target: process.env.VITE_API_URL || 'http://localhost:8888',
         changeOrigin: true,
+        ws: true,
       },
       '/thumbnails': {
         target: process.env.VITE_API_URL || 'http://localhost:8888',