implemented 15,12,18 didn't check 18

frontend/src/components/TranscriptEditor.tsx

@@ -49,6 +49,10 @@ export default function TranscriptEditor({
   const [searchQuery, setSearchQuery] = useState('');
   const [activeMatchIdx, setActiveMatchIdx] = useState(0);
   const searchInputRef = useRef<HTMLInputElement | null>(null);
+  const updateWordText = useEditorStore((s) => s.updateWordText);
+  const [editingWordIndex, setEditingWordIndex] = useState<number | null>(null);
+  const [editText, setEditText] = useState('');
+  const editInputRef = useRef<HTMLInputElement | null>(null);
 
   const selectedSet = useMemo(() => new Set(selectedWordIndices), [selectedWordIndices]);
   const matchIndices = useMemo(() => {
@@ -224,6 +228,61 @@ export default function TranscriptEditor({
     [setSelectedWordIndices],
   );
 
+  const startEditing = useCallback((index: number) => {
+    const word = words[index];
+    if (!word) return;
+    setEditingWordIndex(index);
+    setEditText(word.word);
+    requestAnimationFrame(() => {
+      editInputRef.current?.focus();
+      editInputRef.current?.select();
+    });
+  }, [words]);
+
+  const commitEdit = useCallback(() => {
+    if (editingWordIndex === null) return;
+    const trimmed = editText.trim();
+    if (trimmed && trimmed !== words[editingWordIndex]?.word) {
+      updateWordText(editingWordIndex, trimmed);
+    }
+    setEditingWordIndex(null);
+    setEditText('');
+  }, [editingWordIndex, editText, words, updateWordText]);
+
+  const cancelEdit = useCallback(() => {
+    setEditingWordIndex(null);
+    setEditText('');
+  }, []);
+
+  const handleWordDoubleClick = useCallback((index: number) => {
+    if (cutMode || muteMode || gainMode || speedMode) return;
+    startEditing(index);
+  }, [cutMode, muteMode, gainMode, speedMode, startEditing]);
+
+  // Focus edit input when it appears
+  useEffect(() => {
+    if (editingWordIndex !== null && editInputRef.current) {
+      editInputRef.current.focus();
+      editInputRef.current.select();
+    }
+  }, [editingWordIndex]);
+
+  // Global key handler for edit mode
+  useEffect(() => {
+    const onKeyDown = (e: KeyboardEvent) => {
+      if (editingWordIndex === null) return;
+      if (e.key === 'Enter') {
+        e.preventDefault();
+        commitEdit();
+      } else if (e.key === 'Escape') {
+        e.preventDefault();
+        cancelEdit();
+      }
+    };
+    window.addEventListener('keydown', onKeyDown);
+    return () => window.removeEventListener('keydown', onKeyDown);
+  }, [editingWordIndex, commitEdit, cancelEdit]);
+
   const cutSelectedWords = useCallback(() => {
     if (selectedWordIndices.length === 0) return;
     const sorted = [...selectedWordIndices].sort((a, b) => a - b);
@@ -319,15 +378,25 @@ export default function TranscriptEditor({
               const isSearchMatch = matchSet.has(globalIndex);
               const isActiveSearchMatch = matchIndices.length > 0 && matchIndices[safeActiveMatchIdx] === globalIndex;
 
+              const isEditing = globalIndex === editingWordIndex;
+
+              // Low-confidence highlighting
+              const CONFIDENCE_THRESHOLD_KEY = 'talkedit:confidenceThreshold';
+              const storedThreshold = typeof window !== 'undefined' ? Number(window.localStorage.getItem(CONFIDENCE_THRESHOLD_KEY)) : 0;
+              const confidenceThreshold = Number.isFinite(storedThreshold) ? storedThreshold : 0.6;
+              const isLowConfidence = word.confidence > 0 && word.confidence < confidenceThreshold && !cutRange && !muteRange && !gainRange && !speedRange;
+              const confidencePct = word.confidence > 0 ? Math.round(word.confidence * 100) : null;
+
               return (
                 <span
                   key={globalIndex}
                   id={`word-${globalIndex}`}
                   data-word-index={globalIndex}
-                  title={`${word.start.toFixed(2)}s — Ctrl+click to seek`}
+                  title={`${word.start.toFixed(2)}s — confidence: ${confidencePct !== null ? confidencePct + '%' : 'N/A'}${isLowConfidence ? ' ⚠️ Low confidence' : ''} — Ctrl+click to seek, double-click to edit`}
                   onMouseDown={(e) => handleWordMouseDown(globalIndex, e)}
                   onMouseEnter={() => handleWordMouseEnter(globalIndex)}
                   onMouseLeave={() => setHoveredWordIndex(null)}
+                  onDoubleClick={() => handleWordDoubleClick(globalIndex)}
                   className={`
                     relative px-[2px] py-[1px] rounded cursor-pointer transition-colors
                     ${cutRange ? 'bg-red-500/20 text-red-100' : ''}
@@ -343,9 +412,21 @@ export default function TranscriptEditor({
                     ${isSelected && !cutRange && !muteRange && !gainRange && !speedRange ? 'bg-editor-word-selected text-white' : ''}
                     ${isActive && !isSelected && !cutRange && !muteRange && !gainRange && !speedRange ? 'bg-editor-accent/20 text-editor-accent' : ''}
                     ${isHovered && !isSelected && !isActive && !cutRange && !muteRange && !gainRange && !speedRange ? 'bg-editor-word-hover' : ''}
+                    ${isLowConfidence ? 'border-b border-dashed border-orange-400/60' : ''}
                   `}
                 >
-                  {word.word}{' '}
+                  {isEditing ? (
+                    <input
+                      ref={editInputRef}
+                      value={editText}
+                      onChange={(e) => setEditText(e.target.value)}
+                      onBlur={commitEdit}
+                      className="w-24 px-1 py-0 text-xs bg-editor-bg border border-editor-accent rounded text-editor-text focus:outline-none"
+                      style={{ minWidth: `${Math.max(word.word.length * 8, 48)}px` }}
+                    />
+                  ) : (
+                    <>{word.word}{' '}</>
+                  )}
                   {(cutRange || muteRange || gainRange || speedRange) && isHovered && (
                     <button
                       onClick={(e) => {
@@ -367,7 +448,7 @@ export default function TranscriptEditor({
         </div>
       );
     },
-    [segments, selectedSet, matchSet, matchIndices, safeActiveMatchIdx, activeWordIndex, hoveredWordIndex, handleWordMouseDown, handleWordMouseEnter, setHoveredWordIndex, getCutRangeForWord, getMuteRangeForWord, getGainRangeForWord, getSpeedRangeForWord, removeCutRange, removeMuteRange, removeGainRange, removeSpeedRange, zoneDragRange, cutMode, muteMode, gainMode, speedMode],
+    [segments, selectedSet, matchSet, matchIndices, safeActiveMatchIdx, activeWordIndex, hoveredWordIndex, handleWordMouseDown, handleWordMouseEnter, setHoveredWordIndex, getCutRangeForWord, getMuteRangeForWord, getGainRangeForWord, getSpeedRangeForWord, removeCutRange, removeMuteRange, removeGainRange, removeSpeedRange, zoneDragRange, cutMode, muteMode, gainMode, speedMode, editingWordIndex, editText, editInputRef, handleWordDoubleClick, commitEdit, setEditText],
   );
 
   return (