fix: type STT text char-by-char, increase TTS debounce to 2s

dashboard/frontend/src/lib/voice.js

@@ -34,7 +34,7 @@ export class VoiceSession {
   _onOutput() {
     if (!this.ttsEnabled || this.listening) return;
     clearTimeout(this._debounce);
-    this._debounce = setTimeout(() => this._readBuffer(), 600);
+    this._debounce = setTimeout(() => this._readBuffer(), 2000);
   }
 
   _readBuffer() {
@@ -84,6 +84,17 @@ export class VoiceSession {
     this._notify();
   }
 
+  _typeText(text) {
+    let i = 0;
+    const next = () => {
+      if (i < text.length && this.ws?.readyState === 1) {
+        this.ws.send(new TextEncoder().encode(text[i++]));
+        setTimeout(next, 20);
+      }
+    };
+    next();
+  }
+
   toggleMic() {
     this.listening ? this.stopListening() : this.startListening();
   }
@@ -101,9 +112,7 @@ export class VoiceSession {
       for (let i = e.resultIndex; i < e.results.length; i++) {
         if (e.results[i].isFinal) {
           const text = e.results[i][0].transcript.trim();
-          if (text && this.ws?.readyState === 1) {
-            this.ws.send(new TextEncoder().encode(text + "\r"));
-          }
+          if (text && this.ws?.readyState === 1) this._typeText(text + "\r");
         }
       }
     };