feat: 工单列表添加关键词搜索功能

- 添加关键词搜索输入框，支持搜索工单标题/内容
- 300ms 防抖优化搜索性能
- 支持与用户筛选同时使用

src/views/ticket/TicketList.vue

@@ -46,6 +46,19 @@
             <el-icon @click.stop="clearUserFilter" style="cursor: pointer"><Close /></el-icon>
           </template>
         </el-input>
+        <!-- 关键词搜索 -->
+        <el-input
+          v-model="searchKeyword"
+          placeholder="搜索工单标题/内容"
+          clearable
+          style="width: 200px"
+          @input="handleKeywordSearch"
+          @clear="handleKeywordSearch"
+        >
+          <template #prefix>
+            <el-icon><Search /></el-icon>
+          </template>
+        </el-input>
         <el-button icon="Refresh" @click="refreshList">刷新</el-button>
       </div>
     </div>
@@ -187,6 +200,10 @@ const isLoading = ref(false)
 const ticketList = ref([])
 const activeStatus = ref('pending') // 默认选中"待处理"
 
+// 关键词搜索
+const searchKeyword = ref('')
+const keywordSearchTimer = ref(null)
+
 // 用户搜索
 const userSearchKeyword = ref('')
 const userList = ref([])
@@ -248,7 +265,8 @@ const fetchTicketList = async () => {
       statusParam,
       sortBy.value,
       sortOrder.value,
-      selectedUser.value?.user_id
+      selectedUser.value?.user_id,
+      searchKeyword.value.trim()
     )
 
     if (res.code === 200) {
@@ -348,6 +366,17 @@ const clearUserFilter = () => {
   fetchTicketList()
 }
 
+// 关键词搜索
+const handleKeywordSearch = () => {
+  if (keywordSearchTimer.value) {
+    clearTimeout(keywordSearchTimer.value)
+  }
+  keywordSearchTimer.value = setTimeout(() => {
+    currentPage.value = 1
+    fetchTicketList()
+  }, 300)
+}
+
 // 按状态过滤
 const filterByStatus = (status) => {
   if (activeStatus.value === status) return
@@ -479,6 +508,9 @@ onBeforeUnmount(() => {
   if (userSearchTimer.value) {
     clearTimeout(userSearchTimer.value)
   }
+  if (keywordSearchTimer.value) {
+    clearTimeout(keywordSearchTimer.value)
+  }
 })
 </script>