- new primitives: ripple_delete_in_to_out (ripple or gap fill plus
work-area state, one undo command), trim_clips_to (batch edge trim
returning a count), delete_empty_tracks (type-filtered batch), and
marker_remove_many (sparse marker deletion by timestamp array)
- delete-in-to-out, edit-to, delete-all-empty-tracks, and sequence
viewer marker deletion now go through the facade; empty operations
no longer push empty undo entries
- footage viewer marker deletion keeps its app path deliberately
(facade marker handles are Sequences, not generic viewers); the
tentative subtitle track and pointer drag chain stay as documented
leftovers
Mike-Solar
0fe37dba3c