Merge pull request #458 from bayma888/feature/admin-user-balance-history

feat(admin): 管理员可查看每个用户充值和并发变动记录、点击余额可直接查看、优化弹框UI

backend/internal/handler/admin/admin_service_stub_test.go

@@ -290,5 +290,9 @@ func (s *stubAdminService) ExpireRedeemCode(ctx context.Context, id int64) (*ser
 	return &code, nil
 }
 
+func (s *stubAdminService) GetUserBalanceHistory(ctx context.Context, userID int64, page, pageSize int, codeType string) ([]service.RedeemCode, int64, float64, error) {
+	return s.redeems, int64(len(s.redeems)), 100.0, nil
+}
+
 // Ensure stub implements interface.
 var _ service.AdminService = (*stubAdminService)(nil)

backend/internal/handler/admin/user_handler.go

@@ -277,3 +277,44 @@ func (h *UserHandler) GetUserUsage(c *gin.Context) {
 
 	response.Success(c, stats)
 }
+
+// GetBalanceHistory handles getting user's balance/concurrency change history
+// GET /api/v1/admin/users/:id/balance-history
+// Query params:
+//   - type: filter by record type (balance, admin_balance, concurrency, admin_concurrency, subscription)
+func (h *UserHandler) GetBalanceHistory(c *gin.Context) {
+	userID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid user ID")
+		return
+	}
+
+	page, pageSize := response.ParsePagination(c)
+	codeType := c.Query("type")
+
+	codes, total, totalRecharged, err := h.adminService.GetUserBalanceHistory(c.Request.Context(), userID, page, pageSize, codeType)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	// Convert to admin DTO (includes notes field for admin visibility)
+	out := make([]dto.AdminRedeemCode, 0, len(codes))
+	for i := range codes {
+		out = append(out, *dto.RedeemCodeFromServiceAdmin(&codes[i]))
+	}
+
+	// Custom response with total_recharged alongside pagination
+	pages := int((total + int64(pageSize) - 1) / int64(pageSize))
+	if pages < 1 {
+		pages = 1
+	}
+	response.Success(c, gin.H{
+		"items":           out,
+		"total":           total,
+		"page":            page,
+		"page_size":       pageSize,
+		"pages":           pages,
+		"total_recharged": totalRecharged,
+	})
+}