feat: Add owner account management feature with a new frontend list component and backend API/database integration.

backend/internal/database/sqlite.go

@@ -237,6 +237,36 @@ func (d *DB) ClearTeamOwners() error {
 	return err
 }
 
+// GetOwnersWithoutAccountID 获取缺少 account_id 的 owners
+func (d *DB) GetOwnersWithoutAccountID() ([]TeamOwner, error) {
+	rows, err := d.db.Query(`
+		SELECT id, email, password, token, account_id, status, created_at 
+		FROM team_owners WHERE account_id = '' OR account_id IS NULL
+		ORDER BY created_at DESC
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var owners []TeamOwner
+	for rows.Next() {
+		var owner TeamOwner
+		err := rows.Scan(&owner.ID, &owner.Email, &owner.Password, &owner.Token, &owner.AccountID, &owner.Status, &owner.CreatedAt)
+		if err != nil {
+			continue
+		}
+		owners = append(owners, owner)
+	}
+	return owners, nil
+}
+
+// UpdateOwnerAccountID 更新 owner 的 account_id
+func (d *DB) UpdateOwnerAccountID(id int64, accountID string) error {
+	_, err := d.db.Exec("UPDATE team_owners SET account_id = ? WHERE id = ?", accountID, id)
+	return err
+}
+
 // GetOwnerStats 获取统计
 func (d *DB) GetOwnerStats() map[string]int {
 	stats := map[string]int{