fix(annotations): reset liveWidth/liveHeight in handleKeyDown error rollback [M1, M6]

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/lib/components/AnnotationEditOverlay.svelte

@@ -219,9 +219,12 @@ function handleKeyDown(event: KeyboardEvent): void {
 				width: liveWidth,
 				height: liveHeight
 			});
-		} catch {
+		} catch (err) {
+			console.error('annotation keyboard update failed', err);
 			liveX = annotation.x;
 			liveY = annotation.y;
+			liveWidth = annotation.width;
+			liveHeight = annotation.height;
 		}
 	}, 300);
 }