修复工单、日志、卡密管理页面的分页和筛选功能

- 工单管理：后端添加分页和筛选支持（status, priority, type, 日期范围）
- 日志管理：前端使用服务端分页和筛选（后端已支持）
- 卡密管理：前端使用服务端分页和筛选（后端已支持）
- 所有页面移除前端筛选逻辑，改为服务端筛选
- 修复分页总数与筛选数据不匹配的问题
- 添加watch监听筛选条件变化，自动刷新数据

backend/internal/router/admin/tickets.go

@@ -1,8 +1,9 @@
-package admin
+package admin
 
 import (
 	"fmt"
 	"log"
+	"strconv"
 
 	"verification-platform-backend/internal/database"
 	"verification-platform-backend/internal/model"
@@ -49,12 +50,55 @@ func handleGetTicketStats(c *gin.Context) {
 
 func handleGetTickets(c *gin.Context) {
 	userID := c.GetUint("user_id")
+	
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
+	statusFilter := c.Query("status")
+	priorityFilter := c.Query("priority")
+	typeFilter := c.Query("type")
+	createdStartDate := c.Query("created_start_date")
+	createdEndDate := c.Query("created_end_date")
+	updatedStartDate := c.Query("updated_start_date")
+	updatedEndDate := c.Query("updated_end_date")
+
+	query := database.DB.Model(&model.Ticket{}).Where("user_id = ? OR assigned_to = ?", userID, userID)
+
+	if statusFilter != "" {
+		query = query.Where("status = ?", statusFilter)
+	}
+	if priorityFilter != "" {
+		query = query.Where("priority = ?", priorityFilter)
+	}
+	if typeFilter != "" {
+		query = query.Where("type = ?", typeFilter)
+	}
+	if createdStartDate != "" {
+		query = query.Where("created_at >= ?", createdStartDate+" 00:00:00")
+	}
+	if createdEndDate != "" {
+		query = query.Where("created_at <= ?", createdEndDate+" 23:59:59")
+	}
+	if updatedStartDate != "" {
+		query = query.Where("updated_at >= ?", updatedStartDate+" 00:00:00")
+	}
+	if updatedEndDate != "" {
+		query = query.Where("updated_at <= ?", updatedEndDate+" 23:59:59")
+	}
+
+	var total int64
+	query.Count(&total)
+
+	offset := (page - 1) * pageSize
+
 	var tickets []model.Ticket
-	if err := database.DB.Where("user_id = ? OR assigned_to = ?", userID, userID).
+	if err := query.
 		Preload("Replies").
 		Preload("Application").
 		Preload("User").
 		Preload("AssignedUser").
+		Order("created_at DESC").
+		Offset(offset).
+		Limit(pageSize).
 		Find(&tickets).Error; err != nil {
 		response.Error(c, 500, "获取工单列表失败")
 		return
@@ -84,8 +128,11 @@ func handleGetTickets(c *gin.Context) {
 	}
 
 	response.Success(c, gin.H{
-		"tickets": result,
-		"total":   len(result),
+		"tickets":    result,
+		"total":      total,
+		"page":       page,
+		"page_size":  pageSize,
+		"total_page": (total + int64(pageSize) - 1) / int64(pageSize),
 	})
 }