[x] Storyboard Image Workflow: Start/End Image Context Menus [x] Storyboard Frame Extraction: "Prev Video End" and "Prev Beat Frame" (exact sync) [x] Storyboard Frame Extraction: "Next Clip Start" copy for visual continuity [x] UI: Native Storyboard scrolling (removed VirtuosoGrid) to optimize layout shifts [x] Card Layout: Unified textarea heights (200px cap), hidden scrollbars, "Right-click editor" tooltips [ ] Manual BPM adjustment / Tap Tempo [ ] Section Boundaries: Auto-detect verse/chorus transitions