Add placeholder Whisper WASM modules

README.md

@@ -56,3 +56,5 @@ cd app
 npm install
 npm run dev
 ```
+
+If you skip the build step above, the repository ships small placeholder modules so the app still builds, but Whisper will not run until you generate the real WASM binaries.

app/public/wasm/whisper-web.js

@@ -0,0 +1,10 @@
+// Placeholder Whisper WASM factory used when the real bundle is not built.
+// Run ./scripts/build-wasm.sh to generate the optimized version.
+export default async function whisperFactory() {
+  console.warn('Using placeholder Whisper WASM bundle. Run ./scripts/build-wasm.sh to build the real binary.');
+  return {
+    FS_writeFile: () => {
+      // no-op placeholder
+    }
+  };
+}

app/public/wasm/whisper-web.single.js

@@ -0,0 +1,3 @@
+// Placeholder single-threaded Whisper WASM factory.
+import whisperFactory from './whisper-web.js';
+export default whisperFactory;