-- Migration 001 — Add OAuth + profile fields
-- Safe: ADD COLUMN NULL only, no data loss
-- Run: mysql -u <user> -p clickerz < migrations/001_add_oauth_profile_fields.sql

ALTER TABLE users
  ADD COLUMN IF NOT EXISTS firstname VARCHAR(50) NULL,
  ADD COLUMN IF NOT EXISTS lastname VARCHAR(50) NULL,
  ADD COLUMN IF NOT EXISTS super_oauth_id VARCHAR(36) NULL;

-- Unique index separately (idempotent)
CREATE UNIQUE INDEX IF NOT EXISTS uq_users_super_oauth_id
  ON users (super_oauth_id);
