Editing a video with a newly-uploaded file produced a new content-addressed
object and orphaned the old one. editModalController.handleSubmit now removes the
old object (best-effort) when the hosted URL was genuinely replaced — guarded so
it only fires when both old and new URLs are present and different (so clearing
the URL, which may still be referenced by a magnet web-seed, never deletes it),
and it deliberately leaves thumbnails alone (the new note may still point at
them). Reuses R2Service.deleteVideoStorage (owned-objects-only, never throws).
Documented the cleanup contract in AGENTS.md §4a.
Test: tests/ui/edit-modal-storage-cleanup.test.mjs (3). Full suite green.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
