fix previews in Commander

vite.config.ts

@@ -27,6 +27,41 @@ export default defineConfig(async () => ({
     // ],
     plugins: [react()],
 
+    // Some viewer libs (e.g. @extend-ai/react-xlsx) ship code-splitting Web Workers,
+    // which require ES-module worker output rather than the default iife.
+    worker: { format: 'es' },
+
+    optimizeDeps: {
+        // These viewer libs create Web Workers via `new URL('./worker.js', import.meta.url)`.
+        // Vite's dep pre-bundler doesn't emit those worker files, so in dev the worker URL
+        // 404s ("file does not exist in the optimize deps directory"). Excluding them routes
+        // the workers through Vite's normal worker pipeline. (Prod/Rollup handles them fine.)
+        exclude: [
+            '@extend-ai/react-docx',
+            '@extend-ai/react-xlsx',
+            '@extend-ai/react-pptx',
+        ],
+        // Because the packages above are excluded, Vite never scans them to discover their
+        // own dependencies — so their (often CJS) imports like `react-dom/server` aren't
+        // pre-bundled and named imports fail ("Importing binding name ... is not found").
+        // Force-optimize the deps they import by name so interop is applied.
+        include: [
+            'react-dom/server',
+            'regl',
+            'topojson-client',
+            'utif',
+            'fast-png',
+            '@chenglou/pretext',
+            'fflate',
+            'd3-geo',
+            'd3-hierarchy',
+            'd3-scale',
+            'd3-shape',
+            '@tanstack/react-virtual',
+            '@tanstack/virtual-core',
+        ],
+    },
+
     build: { chunkSizeWarningLimit: 5120 },
 
     esbuild: {