Introduced a new short-form mode optimized for 15-25s clips, ensuring structural integrity by strictly preserving the first and last beats while intelligently sampling intermediate content. Centralized critical timing constraints like 'readingFloorSeconds' and 'lineFitsDuration' into the core package to prevent logical drift across the director, planner, and authoring modules. These changes improve pacing and consistency, ensuring generated cuts remain watchable and punchy regardless of the source material length.