with open('backend/app/db.py', 'r', encoding='utf-8') as f:
    content = f.read()

new_func = '''def list_segment_edits(video_id: str) -> list[dict]:
    with _DB_LOCK:
        conn = get_conn()
        cur = conn.cursor()
        cur.execute(
            "SELECT * FROM segment_edits WHERE video_id = ? ORDER BY segment_key",
            (video_id,),
        )
        rows = cur.fetchall()
        conn.close()
        return [_row_to_dict(row) for row in rows]

def replace_segment_edits'''

content = content.replace('def replace_segment_edits', new_func)

with open('backend/app/db.py', 'w', encoding='utf-8') as f:
    f.write(content)
print('db.py patched')