feat: Establish core backend services including SQLite database, structured logging, and initial owner management capabilities.

backend/internal/database/sqlite.go

@@ -459,6 +459,33 @@ func (d *DB) UpdateOwnerAccountID(id int64, accountID string) error {
 	return err
 }
 
+// GetTeamOwnerIDs 获取所有符合条件的 owner ID（用于全选）
+func (d *DB) GetTeamOwnerIDs(status string) ([]int64, error) {
+	query := "SELECT id FROM team_owners WHERE 1=1"
+	args := []interface{}{}
+	if status != "" {
+		query += " AND status = ?"
+		args = append(args, status)
+	}
+	query += " ORDER BY created_at DESC"
+
+	rows, err := d.db.Query(query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var ids []int64
+	for rows.Next() {
+		var id int64
+		if err := rows.Scan(&id); err != nil {
+			continue
+		}
+		ids = append(ids, id)
+	}
+	return ids, nil
+}
+
 // GetOwnerStats 获取统计
 func (d *DB) GetOwnerStats() map[string]int {
 	stats := map[string]int{