bug fix

src/public/js/app.js

@@ -176,7 +176,12 @@ function initRecognition() {
     checkBtn.disabled = !display.trim();
   };
 
-  r.onend   = () => { if (state.isRecording) stopRecording(); };
+  r.onend = () => {
+    if (state.isRecording) {
+      // Android stops recognition on its own after silence — restart it
+      try { r.start(); } catch (_) {}
+    }
+  };
   r.onerror = (e) => { if (e.error !== 'no-speech') stopRecording(); };
 
   return r;
@@ -207,7 +212,9 @@ async function startRecording() {
   clearTimeout(recordingTimer);
   recordingTimer = setTimeout(stopRecording, MAX_RECORD_SECONDS * 1000);
 
-  // MediaRecorder for audio download — best-effort, after recognition starts
+  // MediaRecorder for audio download — desktop only; on mobile it conflicts with SpeechRecognition
+  const isMobile = /Android|iPhone|iPad/i.test(navigator.userAgent);
+  if (!isMobile) {
     try {
       const stream   = await navigator.mediaDevices.getUserMedia({ audio: true });
       const mimeType = MediaRecorder.isTypeSupported('audio/webm;codecs=opus')
@@ -224,6 +231,7 @@ async function startRecording() {
       console.warn('MediaRecorder unavailable:', e);
     }
   }
+}
 
 function stopRecording() {
   clearTimeout(recordingTimer);