解决超话签到中选择性签到的逻辑问题

init-db.sql

@@ -28,6 +28,7 @@ CREATE TABLE IF NOT EXISTS accounts (
     encrypted_cookies TEXT NOT NULL,
     iv VARCHAR(32) NOT NULL,
     status VARCHAR(20) DEFAULT 'pending',
+    selected_topics JSON DEFAULT NULL,
     last_checked_at TIMESTAMP NULL,
     created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
     INDEX idx_accounts_user_id (user_id),