feat: add speech synthesis demo

2026-07-30 15:26:57 +08:00
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+# Demo Speech Synthesis
+
+CUTOS 4.0 LWA demo for `@cutos/speech-synthesis`. It uses the browser-side Web Speech API and Windows-installed voices. It does not require a CUTOS Provider, Device Driver, or Gateway service.
+
+## Local Development
+
+Build the sibling SDK first:
+
+```sh
+cd ../sdk
+npm install
+npm run build
+
+cd ../demo-speech-synthesis
+npm install
+npm run dev
+```
+
+## LWA Build And Release
+
+```sh
+npx cutos lwa build
+npx cutos login --username office
+npx cutos lwa upload
+npx cutos lwa list demo-speech-synthesis
+npx cutos lwa publish --device <device-id>
+```
+
+The release version is managed only by `public/config.json`.
+
+## Offline Validation
+
+1. Run the LWA on a Windows CUTOS Runtime.
+2. Confirm **Speech API Ready** and at least one listed voice.
+3. Prefer a voice marked **Local** for offline operation.
+4. Enter text and click **Speak**; the Activity card should show start and completion events.
+
+If no voices are listed, install a Windows speech voice pack and restart the Runtime. Some WebView implementations require speech to start from a user interaction, so this demo always uses an explicit Speak button.