fix(overlay): thin centered trim handles and label-free subtitle boundaries in timing review (#274)

src/renderer/modals/media-timing-review.ts

@@ -449,8 +449,8 @@ export function createMediaTimingReviewModal(
   }
 
   /**
-   * Moves an untouched clip end back to where the line's dialogue ends. The Line end
-   * rail keeps marking the subtitle timing, and Reset restores it.
+   * Moves an untouched clip end back to where the line's dialogue ends. The orange
+   * end bar keeps marking the subtitle timing, and Reset restores it.
    */
   function trimTrailingSilence(peaks: readonly number[]): void {
     if (!payload || !trailingTrimPending || previewPlaying || previewRequest.isInFlight()) {