feat: add voice-to-text input using Web Speech API

src/components/EditPanel.tsx

@@ -1,8 +1,9 @@
-import React, { useState } from 'react';
+import React, { useState, useRef, useCallback } from 'react';
 import { ExcelRow, COLUMNS } from '../types';
-import { X, Sparkles, Save, Loader2, Languages, Package, CheckCircle2 } from 'lucide-react';
+import { X, Sparkles, Save, Loader2, Languages, Package, CheckCircle2, Mic, MicOff } from 'lucide-react';
 import { generateGemini } from '../services/gemini';
 import { cn } from '../lib/utils';
+import { useSpeechRecognition } from '../lib/useSpeechRecognition';
 import { ConfirmModal } from './ConfirmModal';
 
 interface EditPanelProps {
@@ -49,6 +50,9 @@ interface FieldEditorProps {
   onGenerate: () => void;
   onChange: (val: string) => void;
   onKeyDown: (e: React.KeyboardEvent) => void;
+  isListening?: boolean;
+  onToggleVoice?: () => void;
+  voiceSupported?: boolean;
 }
 
 const FieldEditor = ({ 
@@ -61,7 +65,10 @@ const FieldEditor = ({
   isLoading, 
   onGenerate, 
   onChange, 
-  onKeyDown 
+  onKeyDown,
+  isListening,
+  onToggleVoice,
+  voiceSupported
 }: FieldEditorProps) => (
   <div className="flex flex-col gap-2">
     <div className="flex items-center justify-between">
@@ -73,6 +80,21 @@ const FieldEditor = ({
             Can translate from existing
           </div>
         )}
+        {voiceSupported && (
+          <button
+            onClick={onToggleVoice}
+            className={cn(
+              "flex items-center gap-1.5 text-xs font-medium px-2 py-1 rounded transition-colors",
+              isListening 
+                ? "bg-red-600/20 text-red-400 animate-pulse" 
+                : "bg-slate-700/50 text-slate-400 hover:bg-slate-600 hover:text-white"
+            )}
+            title={isListening ? "Stop recording" : "Voice input"}
+          >
+            {isListening ? <MicOff className="w-3 h-3" /> : <Mic className="w-3 h-3" />}
+            {isListening ? 'Stop' : 'Voice'}
+          </button>
+        )}
         <button
           onClick={onGenerate}
           disabled={isLoading}
@@ -127,6 +149,17 @@ export function EditPanel({ row, rowIndex, onSave, onClose, onCaptureState }: Ed
   const [pendingGeminiField, setPendingGeminiField] = useState<keyof typeof formData | null>(null);
   const [generatedFields, setGeneratedFields] = useState<Set<string>>(new Set());
 
+  const handleSpeechResult = useCallback((transcript: string) => {
+    setFormData(prev => ({ ...prev, longDe: prev.longDe + ' ' + transcript }));
+  }, []);
+
+  const { isListening: isListeningDe, start: startListeningDe, stop: stopListeningDe, isSupported: speechSupported } = useSpeechRecognition({ onResult: handleSpeechResult });
+
+  const handleSpeechResultEn = useCallback((transcript: string) => {
+    setFormData(prev => ({ ...prev, longEn: prev.longEn + ' ' + transcript }));
+  }, []);
+  const { isListening: isListeningEn, start: startListeningEn, stop: stopListeningEn } = useSpeechRecognition({ onResult: handleSpeechResultEn, lang: 'en-US' });
+
   const isModified = (field: keyof typeof formData) => {
     const colMap: Record<string, number> = {
       longDe: COLUMNS.LONG_DE,
@@ -351,6 +384,9 @@ export function EditPanel({ row, rowIndex, onSave, onClose, onCaptureState }: Ed
             onGenerate={() => handleGenerate('longDe')}
             onChange={(val) => setFormData(p => ({...p, longDe: val}))}
             onKeyDown={handleInputKeyDown}
+            isListening={isListeningDe}
+            onToggleVoice={isListeningDe ? stopListeningDe : startListeningDe}
+            voiceSupported={speechSupported}
           />
           <FieldEditor 
             title="Long Description (EN)" 
@@ -363,6 +399,9 @@ export function EditPanel({ row, rowIndex, onSave, onClose, onCaptureState }: Ed
             onGenerate={() => handleGenerate('longEn')}
             onChange={(val) => setFormData(p => ({...p, longEn: val}))}
             onKeyDown={handleInputKeyDown}
+            isListening={isListeningEn}
+            onToggleVoice={isListeningEn ? stopListeningEn : startListeningEn}
+            voiceSupported={speechSupported}
           />
           <FieldEditor 
             title="Short Description (DE)" 

src/lib/useSpeechRecognition.ts

@@ -0,0 +1,74 @@
+import { useState, useCallback, useRef, useEffect } from 'react';
+
+interface UseSpeechRecognitionOptions {
+  onResult: (transcript: string) => void;
+  lang?: string;
+}
+
+interface UseSpeechRecognitionReturn {
+  isListening: boolean;
+  start: () => void;
+  stop: () => void;
+  isSupported: boolean;
+}
+
+export function useSpeechRecognition({ onResult, lang = 'en-US' }: UseSpeechRecognitionOptions): UseSpeechRecognitionReturn {
+  const [isListening, setIsListening] = useState(false);
+  const recognitionRef = useRef<any>(null);
+
+  const isSupported = typeof window !== 'undefined' && ('SpeechRecognition' in window || 'webkitSpeechRecognition' in window);
+
+  useEffect(() => {
+    if (!isSupported) return;
+
+    const SpeechRecognition = (window as any).SpeechRecognition || (window as any).webkitSpeechRecognition;
+    const recognition = new SpeechRecognition();
+    recognition.continuous = true;
+    recognition.interimResults = true;
+    recognition.lang = lang;
+
+    recognition.onresult = (event: any) => {
+      let transcript = '';
+      for (let i = event.resultIndex; i < event.results.length; i++) {
+        transcript += event.results[i][0].transcript;
+      }
+      if (event.results[event.resultIndex].isFinal) {
+        onResult(transcript);
+      }
+    };
+
+    recognition.onerror = () => {
+      setIsListening(false);
+    };
+
+    recognition.onend = () => {
+      setIsListening(false);
+    };
+
+    recognitionRef.current = recognition;
+
+    return () => {
+      try {
+        recognition.stop();
+      } catch (e) {}
+    };
+  }, [isSupported, lang, onResult]);
+
+  const start = useCallback(() => {
+    if (!recognitionRef.current || isListening) return;
+    try {
+      recognitionRef.current.start();
+      setIsListening(true);
+    } catch (e) {}
+  }, [isListening]);
+
+  const stop = useCallback(() => {
+    if (!recognitionRef.current || !isListening) return;
+    try {
+      recognitionRef.current.stop();
+      setIsListening(false);
+    } catch (e) {}
+  }, [isListening]);
+
+  return { isListening, start, stop, isSupported };
+}