feat(editor): edit transcript text in the transcript pane

src/components/ai-edition/NewEditorShell.tsx

@@ -22,6 +22,7 @@ import {
 	useTimelineTranscriptGate,
 	useTranscriptionStore,
 } from "@/lib/ai-edition/store/transcriptionStore";
+import { enqueueTranscriptTextEdit } from "@/lib/ai-edition/store/transcriptTextEdit";
 import { useUndoRedoShortcuts } from "@/lib/ai-edition/store/undo";
 import { useSequentialTimelineOps } from "@/lib/ai-edition/store/useSequentialTimelineOps";
 import { useTimeline } from "@/lib/ai-edition/store/useTimeline";
@@ -604,6 +605,32 @@ export function NewEditorShell() {
 		[applyTimelineOp],
 	);
 
+	// Capture the source project in the callback closure. Debounced saves and the pane's
+	// unmount flush can run after another project has loaded, so the queued task verifies
+	// this identity again before reading or persisting the current document.
+	const handleEditTranscriptText = useCallback(
+		async (assetId: string, wordIds: readonly string[], text: string): Promise<boolean> => {
+			if (!projectId) return false;
+			try {
+				return await enqueueTranscriptTextEdit({
+					sourceProjectId: projectId,
+					assetId,
+					wordIds,
+					text,
+					enqueue: enqueueTimelineWrite,
+					saveDocument,
+				});
+			} catch (error) {
+				console.error("[transcript] failed to edit text:", error);
+				toast.error("Could not edit transcript text", {
+					description: error instanceof Error ? error.message : String(error),
+				});
+				return false;
+			}
+		},
+		[enqueueTimelineWrite, projectId, saveDocument],
+	);
+
 	const handleSelectProject = useCallback(
 		async (id: string) => {
 			try {
@@ -1151,6 +1178,7 @@ export function NewEditorShell() {
 		onSeek: handleSeek,
 		onAddTrimRange: handleAddTrimRange,
 		onRemoveTrimRange: handleRemoveTrimRange,
+		onEditTranscriptText: handleEditTranscriptText,
 		onTranscribe: handleTranscribe,
 		canTranscribe: hasAsset,
 		isTranscribing: transcriptGate.state === "pending",