feat(system): 通知管理与文件选择器来源筛选

- 新增通知管理（渠道卡片化、模板 CRUD、参数按钮插入）

- ImageSelector/AvatarSelector 增加上传来源 is_admin 筛选

- 宿主机详情页实时指标与硬件/网卡 IPv6 展示优化

Co-authored-by: Cursor <cursoragent@cursor.com>

src/components/admin/AvatarSelector.vue

@@ -13,9 +13,15 @@
             <div class="file-list-container">
               <div class="file-list-header">
                 <h4>文件列表</h4>
-                <el-button type="primary" @click="switchToUpload" :icon="Upload">
-                  上传新文件
-                </el-button>
+                <div class="header-actions">
+                  <el-select v-model="sourceFilter" placeholder="上传来源" clearable size="default" style="width: 120px" @change="handleSourceChange">
+                    <el-option label="管理员" :value="true" />
+                    <el-option label="用户" :value="false" />
+                  </el-select>
+                  <el-button type="primary" @click="switchToUpload" :icon="Upload">
+                    上传新文件
+                  </el-button>
+                </div>
               </div>
               <div class="file-grid" v-loading="loading">
                 <div 
@@ -137,6 +143,7 @@ import { closeAllMessage } from '../../utils/message'
   const currentPage = ref(1)
   const pageSize = ref(10)
   const total = ref(0)
+  const sourceFilter = ref(undefined)
   
   // 监听 modelValue 变化
   watch(() => props.modelValue, (newVal) => {
@@ -144,6 +151,7 @@ import { closeAllMessage } from '../../utils/message'
     if (newVal) {
       selectedId.value = props.currentCoverId
       currentPage.value = 1
+      sourceFilter.value = undefined
       fetchFileList()
     }
   })
@@ -161,10 +169,11 @@ import { closeAllMessage } from '../../utils/message'
     fileList.value = [] // 清空列表
     
     try {
-      const res = await getFileList({ 
-        page: currentPage.value,
-        count: pageSize.value
-      })
+      const params = { page: currentPage.value, count: pageSize.value }
+      if (sourceFilter.value !== undefined && sourceFilter.value !== null && sourceFilter.value !== '') {
+        params.is_admin = sourceFilter.value
+      }
+      const res = await getFileList(params)
       
       console.log("获取文件列表：", res)
       
@@ -219,6 +228,12 @@ import { closeAllMessage } from '../../utils/message'
     fetchFileList()
   }
   
+  // 来源筛选变化
+  const handleSourceChange = () => {
+    currentPage.value = 1
+    fetchFileList()
+  }
+
   // 切换到上传标签页
   const switchToUpload = () => {
     activeTab.value = 'upload'
@@ -312,6 +327,7 @@ import { closeAllMessage } from '../../utils/message'
     fileList.value = []
     currentPage.value = 1
     total.value = 0
+    sourceFilter.value = undefined
   }
   
   // 确认选择
@@ -347,6 +363,12 @@ import { closeAllMessage } from '../../utils/message'
     margin: 0;
     color: #303133;
   }
+
+  .header-actions {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+  }
   
   .file-grid {
     display: grid;