-- Run once on existing databases (phpMyAdmin or mysql CLI).
-- Profile fields + sermon external video URL (keeps video_id UNIQUE for YouTube sync).

ALTER TABLE users
  ADD COLUMN phone VARCHAR(40) NULL DEFAULT NULL AFTER email,
  ADD COLUMN address TEXT NULL AFTER phone,
  ADD COLUMN profile_photo_url VARCHAR(512) NULL AFTER address;

ALTER TABLE youtube_videos
  ADD COLUMN watch_url TEXT NULL AFTER video_id;
