Fix react-ace import: add optimizeDeps to Vite config

- Added react-ace and ace-builds to optimizeDeps.include
- This forces Vite to properly bundle the CommonJS react-ace module
- Resolves 'Element type is invalid' error when opening files

The react-ace package uses CommonJS exports, and Vite needs to
pre-bundle it to properly handle the default export in ESM context.

gadget-code/frontend/vite.config.ts

@@ -11,6 +11,9 @@ export default defineConfig({
   plugins: [react()],
   root: '.',
   publicDir: 'public',
+  optimizeDeps: {
+    include: ['react-ace', 'ace-builds'],
+  },
   server: {
     port: 5174,
     host: '0.0.0.0',