用户管理增加查找筛选

后台用户列表此前仅分页，数据量大时无法定位用户。

- 后端：List 新增 ListQuery（关键词 + 状态），抽出 applyUserFilter
  对总数与列表查询统一加筛选；关键词为纯数字时同时按用户 ID 精确匹配，
  否则按手机号/昵称模糊匹配
- 前端：AdminUsersView 新增筛选栏（关键词：手机号/昵称/用户ID，
  状态：正常/已冻结/已禁用），回车/清空/选择即查，查询重置到第 1 页

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

backend/internal/modules/adminuser/repository.go

@@ -3,6 +3,8 @@ package adminuser
 import (
 	"context"
 	"errors"
+	"strconv"
+	"strings"
 
 	"hfb_sys/backend/internal/auditlog"
 	"hfb_sys/backend/internal/model"
@@ -21,14 +23,15 @@ func NewRepository(db *gorm.DB) *Repository {
 	return &Repository{db: db}
 }
 
-func (r *Repository) List(ctx context.Context, page, pageSize int) (*PaginatedResult, error) {
+func (r *Repository) List(ctx context.Context, page, pageSize int, query ListQuery) (*PaginatedResult, error) {
 	var total int64
-	if err := r.db.WithContext(ctx).Model(&model.User{}).Count(&total).Error; err != nil {
+	countTx := applyUserFilter(r.db.WithContext(ctx).Table("users AS u"), query)
+	if err := countTx.Count(&total).Error; err != nil {
 		return nil, err
 	}
 	offset := (page - 1) * pageSize
 	var rows []userRow
-	err := r.db.WithContext(ctx).Table("users AS u").
+	listTx := r.db.WithContext(ctx).Table("users AS u").
 		Select(`u.*,
 			COALESCE(o.order_count, 0) AS order_count,
 			COALESCE(l.listing_count, 0) AS listing_count,
@@ -37,7 +40,9 @@ func (r *Repository) List(ctx context.Context, page, pageSize int) (*PaginatedRe
 		Joins("LEFT JOIN (SELECT user_id, COUNT(*) AS order_count FROM (SELECT renter_id AS user_id FROM rental_orders UNION ALL SELECT owner_id AS user_id FROM rental_orders) AS order_users GROUP BY user_id) AS o ON o.user_id = u.id").
 		Joins("LEFT JOIN (SELECT owner_id AS user_id, COUNT(*) AS listing_count FROM rental_listings GROUP BY owner_id) AS l ON l.user_id = u.id").
 		Joins("LEFT JOIN (SELECT user_id, COUNT(*) AS dispute_count FROM (SELECT initiator_id AS user_id FROM disputes UNION ALL SELECT target_user_id AS user_id FROM disputes) AS dispute_users GROUP BY user_id) AS d ON d.user_id = u.id").
-		Joins("LEFT JOIN (SELECT renter_id AS user_id, SUM(deposit_waived_amount_cent) AS deposit_free_used_cent FROM rental_orders WHERE status NOT IN ('completed', 'cancelled', 'closed') GROUP BY renter_id) AS df ON df.user_id = u.id").
+		Joins("LEFT JOIN (SELECT renter_id AS user_id, SUM(deposit_waived_amount_cent) AS deposit_free_used_cent FROM rental_orders WHERE status NOT IN ('completed', 'cancelled', 'closed') GROUP BY renter_id) AS df ON df.user_id = u.id")
+	listTx = applyUserFilter(listTx, query)
+	err := listTx.
 		Order("u.id DESC").
 		Offset(offset).Limit(pageSize).
 		Scan(&rows).Error
@@ -51,6 +56,23 @@ func (r *Repository) List(ctx context.Context, page, pageSize int) (*PaginatedRe
 	return &PaginatedResult{Items: items, Total: total, Page: page, PageSize: pageSize}, nil
 }
 
+// applyUserFilter 将列表筛选条件应用到查询（基于 users 表别名 u）。
+func applyUserFilter(tx *gorm.DB, query ListQuery) *gorm.DB {
+	if query.Status != "" {
+		tx = tx.Where("u.status = ?", query.Status)
+	}
+	if keyword := strings.TrimSpace(query.Keyword); keyword != "" {
+		like := "%" + keyword + "%"
+		// 关键词为纯数字时一并按用户 ID 精确匹配
+		if id, err := strconv.ParseUint(keyword, 10, 64); err == nil {
+			tx = tx.Where("u.id = ? OR u.phone LIKE ? OR u.nickname LIKE ?", id, like, like)
+		} else {
+			tx = tx.Where("u.phone LIKE ? OR u.nickname LIKE ?", like, like)
+		}
+	}
+	return tx
+}
+
 func (r *Repository) Freeze(ctx context.Context, adminID uint64, userID uint64, req FreezeRequest, meta AuditMeta) (*UserDTO, error) {
 	return r.updateStatus(ctx, adminID, userID, "frozen", "frozen", "admin_user.freeze", req.Reason, meta)
 }