fix: review round 2 — Clear watch progress clears only the resume point, big view focus by the way it arrived, dialog name, reason tooltip, backfill locks

backend/app/reader/service.py

@@ -255,17 +255,6 @@ def mark(db: Session, user: User, video_id: str, status: str) -> None:
     )
 
 
-def clear_state(db: Session, user: User, video_id: str) -> None:
-    """The video back to pristine for this user: status, resume point and `watched_at` all go.
-    Playlist membership lives elsewhere and stays."""
-    lock_takeout(db, user)  # as `unmark`
-    row = queries.video_state(db, user, video_id)
-    if row is not None:
-        db.delete(row)
-        _remember_unmark(db, user, video_id)
-        db.flush()
-
-
 def set_progress(db: Session, user: User, video_id: str, position: int) -> None:
     """The player's resume point. 0 clears it: a row holding nothing else goes, one with a status
     (watched, hidden) keeps it with the position zeroed. The status itself is never changed here.