feat(editor): duplicate annotations

src/components/video-editor/AnnotationSettingsPanel.tsx

@@ -1,6 +1,7 @@
 import Block from "@uiw/react-color-block";
 import {
 	AlignCenter,
+	Copy,
 	AlignLeft,
 	AlignRight,
 	Bold,
@@ -40,6 +41,7 @@ interface AnnotationSettingsPanelProps {
 	onTypeChange: (type: AnnotationType) => void;
 	onStyleChange: (style: Partial<AnnotationRegion["style"]>) => void;
 	onFigureDataChange?: (figureData: FigureData) => void;
+	onDuplicate?: () => void;
 	onDelete: () => void;
 }
 
@@ -62,6 +64,7 @@ export function AnnotationSettingsPanel({
 	onTypeChange,
 	onStyleChange,
 	onFigureDataChange,
+	onDuplicate,
 	onDelete,
 }: AnnotationSettingsPanelProps) {
 	const t = useScopedT("settings");
@@ -597,15 +600,28 @@ export function AnnotationSettingsPanel({
 					</TabsContent>
 				</Tabs>
 
-				<Button
-					onClick={onDelete}
-					variant="destructive"
-					size="sm"
-					className="w-full gap-2 bg-red-500/10 text-red-400 border border-red-500/20 hover:bg-red-500/20 hover:border-red-500/30 transition-all mt-4"
-				>
-					<Trash2 className="w-4 h-4" />
-					{t("annotation.deleteAnnotation")}
-				</Button>
+				<div className="mt-4 grid grid-cols-2 gap-2">
+					<Button
+						onClick={() => onDuplicate?.()}
+						variant="outline"
+						size="sm"
+						disabled={!onDuplicate}
+						className="w-full gap-2 bg-white/5 text-slate-200 border border-white/10 hover:bg-white/10 hover:border-white/20 transition-all"
+					>
+						<Copy className="w-4 h-4" />
+						Duplicate
+					</Button>
+
+					<Button
+						onClick={onDelete}
+						variant="destructive"
+						size="sm"
+						className="w-full gap-2 bg-red-500/10 text-red-400 border border-red-500/20 hover:bg-red-500/20 hover:border-red-500/30 transition-all"
+					>
+						<Trash2 className="w-4 h-4" />
+						{t("annotation.deleteAnnotation")}
+					</Button>
+				</div>
 
 				<div className="mt-6 p-3 bg-white/5 rounded-lg border border-white/5">
 					<div className="flex items-center gap-2 mb-2 text-slate-300">

src/components/video-editor/SettingsPanel.tsx

@@ -140,6 +140,7 @@ interface SettingsPanelProps {
 	onAnnotationTypeChange?: (id: string, type: AnnotationType) => void;
 	onAnnotationStyleChange?: (id: string, style: Partial<AnnotationRegion["style"]>) => void;
 	onAnnotationFigureDataChange?: (id: string, figureData: FigureData) => void;
+	onAnnotationDuplicate?: (id: string) => void;
 	onAnnotationDelete?: (id: string) => void;
 	selectedSpeedId?: string | null;
 	selectedSpeedValue?: PlaybackSpeed | null;
@@ -213,6 +214,7 @@ export function SettingsPanel({
 	onAnnotationTypeChange,
 	onAnnotationStyleChange,
 	onAnnotationFigureDataChange,
+	onAnnotationDuplicate,
 	onAnnotationDelete,
 	selectedSpeedId,
 	selectedSpeedValue,
@@ -466,6 +468,7 @@ export function SettingsPanel({
 						? (figureData) => onAnnotationFigureDataChange(selectedAnnotation.id, figureData)
 						: undefined
 				}
+				onDuplicate={onAnnotationDuplicate ? () => onAnnotationDuplicate(selectedAnnotation.id) : undefined}
 				onDelete={() => onAnnotationDelete(selectedAnnotation.id)}
 			/>
 		);

src/components/video-editor/VideoEditor.tsx

@@ -831,6 +831,33 @@ export default function VideoEditor() {
 		[pushState],
 	);
 
+	const handleAnnotationDuplicate = useCallback(
+		(id: string) => {
+			const duplicateId = `annotation-${nextAnnotationIdRef.current++}`;
+			const duplicateZIndex = nextAnnotationZIndexRef.current++;
+			pushState((prev) => {
+				const source = prev.annotationRegions.find((region) => region.id === id);
+				if (!source) return {};
+
+				const duplicate: AnnotationRegion = {
+					...source,
+					id: duplicateId,
+					zIndex: duplicateZIndex,
+					position: { x: source.position.x + 4, y: source.position.y + 4 },
+					size: { ...source.size },
+					style: { ...source.style },
+					figureData: source.figureData ? { ...source.figureData } : undefined,
+				};
+
+				return { annotationRegions: [...prev.annotationRegions, duplicate] };
+			});
+			setSelectedAnnotationId(duplicateId);
+			setSelectedZoomId(null);
+			setSelectedTrimId(null);
+		},
+		[pushState],
+	);
+
 	const handleAnnotationDelete = useCallback(
 		(id: string) => {
 			pushState((prev) => ({
@@ -1680,6 +1707,7 @@ export default function VideoEditor() {
 						onAnnotationTypeChange={handleAnnotationTypeChange}
 						onAnnotationStyleChange={handleAnnotationStyleChange}
 						onAnnotationFigureDataChange={handleAnnotationFigureDataChange}
+						onAnnotationDuplicate={handleAnnotationDuplicate}
 						onAnnotationDelete={handleAnnotationDelete}
 						selectedSpeedId={selectedSpeedId}
 						selectedSpeedValue={