fix bug

src/public/js/app.js

@@ -146,14 +146,11 @@ function createRecognition() {
   if (!SpeechRecognition) return null;
   const r = new SpeechRecognition();
   r.lang = 'de-DE';
-  r.continuous = true;
-  r.interimResults = true;
+  r.continuous = false;   // one phrase per session — avoids all Android e.resultIndex bugs
+  r.interimResults = true; // stream words within the phrase
   r.maxAlternatives = 1;
 
-  // Android Chrome bug: onresult re-fires old results with e.resultIndex=0.
-  // highestFinalIndex guards against processing the same final result twice.
-  let highestFinalIndex = -1;
-  let sessionFinal = ''; // final text committed within this recognition session
+  let committed = false; // guard: each session commits at most one final result
 
   r.onstart = () => {
     recordBtn.classList.add('recording');
@@ -162,35 +159,27 @@ function createRecognition() {
   };
 
   r.onresult = (e) => {
-    let interim = '';
-    for (let i = 0; i < e.results.length; i++) {
-      if (e.results[i].isFinal) {
-        if (i > highestFinalIndex) {
-          sessionFinal += (sessionFinal ? ' ' : '') + e.results[i][0].transcript;
-          highestFinalIndex = i;
-        }
+    if (committed) return;
+    const result = e.results[0];
+    const text   = result[0].transcript;
+    if (result.isFinal) {
+      committed = true;
+      state.finalTranscript += (state.finalTranscript ? ' ' : '') + text;
+      state.transcript = state.finalTranscript;
     } else {
-        interim = e.results[i][0].transcript; // only the latest interim matters
+      // interim — show but don't commit
+      state.transcript = (state.finalTranscript ? state.finalTranscript + ' ' : '') + text;
     }
-    }
-    const base    = state.finalTranscript;
-    const combined = base + (base && sessionFinal ? ' ' : '') + sessionFinal;
-    const display  = combined + (interim ? (combined ? ' ' : '') + interim : '');
-    if (display.trim().split(/\s+/).length >= MAX_RECORD_WORDS) {
+    if (state.transcript.trim().split(/\s+/).length >= MAX_RECORD_WORDS) {
       stopRecording();
       return;
     }
-    updateTranscriptBox(display);
-    state.transcript = display;
-    checkBtn.disabled = !display.trim();
+    updateTranscriptBox(state.transcript);
+    checkBtn.disabled = !state.transcript.trim();
   };
 
   r.onend = () => {
     if (!state.isRecording) return;
-    // Merge this session's final text into the persistent accumulator before restarting
-    if (sessionFinal) {
-      state.finalTranscript += (state.finalTranscript ? ' ' : '') + sessionFinal;
-    }
     setTimeout(() => {
       if (!state.isRecording) return;
       recognition = createRecognition();
@@ -198,7 +187,6 @@ function createRecognition() {
     }, 100);
   };
 
-  // 'aborted' fires during normal restart cycle — ignore it
   r.onerror = (e) => {
     if (e.error !== 'no-speech' && e.error !== 'aborted') stopRecording();
   };