feat(desktop): 稳定桌面端界面与文件操作反馈

- 重构 DesktopPreferences 为分栏式设置面板，整合连接、外观、通知、更新与诊断信息分区，并补充过渡动效与暗色主题样式
- DesktopLayout 侧边栏导航分组支持展开折叠，调整管理/项目区块顺序并统一图标与标题
- 新增 fileTaskFeedback 工具，统一 pickFiles/saveFile/openFile 的成功/取消提示，替换审计导出、权限日志、附件、文档、线程、项目配置等处的直接调用
- desktopUpdateManager 暴露更新状态快照与状态变更监听，区分检查中、安装中、已推迟、失败等状态
- DesktopServerSettings 增加连接诊断信息（检查时间、健康地址、耗时、HTTP 状态）
- unified-page.css 与 ProjectMilestones 引入 CSS 变量以适配暗色主题
- WebLayout 将服务器设置入口改为打开系统偏好面板，管理菜单中邮件服务归入系统设置分组
- ProfileSettings 移除已迁入偏好面板的桌面端专属区块
- 补充 Layout.desktop 布局与偏好面板契约测试

frontend/src/views/ProfileSettings.vue

@@ -64,45 +64,6 @@
             </el-form-item>
           </section>
 
-          <section class="form-section form-section--desktop">
-            <div class="section-heading">
-              <span class="section-kicker">Desktop</span>
-              <h4>客户端与通知</h4>
-            </div>
-            <el-form-item v-if="isDesktop" label="系统通知">
-              <div class="desktop-setting-stack">
-                <div class="desktop-setting-row">
-                  <el-switch
-                    v-model="desktopNotificationsEnabled"
-                    :loading="desktopNotificationLoading"
-                    @change="onDesktopNotificationChange"
-                  />
-                  <el-tag size="small" :type="notificationPermissionTagType">{{ notificationPermissionText }}</el-tag>
-                </div>
-                <span class="desktop-setting-hint">仅推送不含项目详情的文件更新提示</span>
-              </div>
-            </el-form-item>
-            <el-form-item v-if="isDesktop && desktopUpdaterAvailable" label="桌面更新">
-              <div class="desktop-setting-row">
-                <el-button size="small" :loading="desktopUpdateChecking" @click="checkDesktopUpdateNow">
-                  检查更新
-                </el-button>
-                <span class="desktop-setting-hint">正式版本会按发布源检查签名更新</span>
-              </div>
-            </el-form-item>
-            <el-form-item label="客户端信息">
-              <div class="client-metadata-panel">
-                <dl class="client-metadata-list">
-                  <template v-for="row in clientMetadataRows" :key="row.label">
-                    <dt>{{ row.label }}</dt>
-                    <dd>{{ row.value }}</dd>
-                  </template>
-                </dl>
-                <el-button size="small" @click="copyClientMetadata">复制</el-button>
-              </div>
-            </el-form-item>
-          </section>
-
           <div class="actions">
             <el-button type="primary" :loading="submitting" @click="onSubmit">{{ TEXT.common.actions.save }}</el-button>
           </div>
@@ -118,25 +79,9 @@ import type { FormInstance, FormRules } from "element-plus";
 import { ElMessage } from "element-plus";
 import { Close, Upload } from "@element-plus/icons-vue";
 import { updateProfile, fetchMe, uploadAvatar } from "../api/auth";
-import {
-  getDesktopNotificationSubscription,
-  setDesktopNotificationSubscription,
-} from "../api/desktopNotifications";
 import { useAuthStore } from "../store/auth";
-import {
-  clientRuntime,
-  getAppMetadata,
-  getDesktopServerUrl,
-  getNotificationPermission,
-  isDesktopUpdaterAvailable,
-  isTauriRuntime,
-  pickFiles,
-  requestNotificationPermission,
-  type NotificationPermissionState,
-} from "../runtime";
-import { triggerDesktopNotificationPoll } from "../session/desktopNotificationManager";
-import { checkDesktopUpdateAndPrompt } from "../session/desktopUpdateManager";
 import { TEXT, requiredMessage } from "../locales";
+import { pickFilesWithFeedback } from "../utils/fileTaskFeedback";
 
 const emit = defineEmits<{
   "close-request": [];
@@ -144,31 +89,6 @@ const emit = defineEmits<{
   saved: [];
 }>();
 const auth = useAuthStore();
-const isDesktop = isTauriRuntime();
-const clientMetadata = getAppMetadata();
-const desktopCapabilities = clientRuntime.capabilities();
-const desktopUpdaterAvailable = isDesktopUpdaterAvailable();
-const clientMetadataRows = [
-  { label: "客户端", value: `${clientMetadata.clientType} ${clientMetadata.version}` },
-  { label: "平台", value: clientMetadata.platform },
-  { label: "构建通道", value: clientMetadata.channel },
-  { label: "提交", value: clientMetadata.commit },
-  { label: "服务器", value: getDesktopServerUrl() || "未配置" },
-  {
-    label: "能力",
-    value: [
-      desktopCapabilities.secureSessionStorage ? "安全会话" : "浏览器会话",
-      desktopCapabilities.nativeFiles ? "原生文件" : "浏览器文件",
-      desktopCapabilities.systemNotifications ? "系统通知" : "无系统通知",
-      desktopCapabilities.automaticUpdates ? "自动更新" : "无自动更新",
-    ].join(" / "),
-  },
-];
-const clientMetadataText = clientMetadataRows.map((row) => `${row.label}: ${row.value}`).join("\n");
-const desktopNotificationsEnabled = ref(false);
-const desktopNotificationLoading = ref(false);
-const desktopUpdateChecking = ref(false);
-const notificationPermission = ref<NotificationPermissionState>("unsupported");
 const formRef = ref<FormInstance>();
 const submitting = ref(false);
 const form = reactive({
@@ -247,72 +167,6 @@ const loadProfile = async () => {
   avatarPreview.value = data.avatar_url || undefined;
 };
 
-const loadDesktopNotificationSubscription = async () => {
-  if (!isDesktop) return;
-  notificationPermission.value = await getNotificationPermission().catch(() => "unsupported");
-  const { data } = await getDesktopNotificationSubscription();
-  desktopNotificationsEnabled.value = data.enabled;
-};
-
-const notificationPermissionText = computed(() => {
-  if (!isDesktop) return "不可用";
-  if (notificationPermission.value === "granted") return "系统已允许";
-  if (notificationPermission.value === "denied") return "系统已拒绝";
-  if (notificationPermission.value === "prompt") return "等待授权";
-  return "不可用";
-});
-
-const notificationPermissionTagType = computed<"success" | "warning" | "danger" | "info">(() => {
-  if (notificationPermission.value === "granted") return "success";
-  if (notificationPermission.value === "denied") return "danger";
-  if (notificationPermission.value === "prompt") return "warning";
-  return "info";
-});
-
-const onDesktopNotificationChange = async (value: string | number | boolean) => {
-  if (!isDesktop || desktopNotificationLoading.value) return;
-  desktopNotificationLoading.value = true;
-  try {
-    const enable = Boolean(value);
-    if (enable) {
-      const permission = await requestNotificationPermission();
-      notificationPermission.value = permission;
-      if (permission !== "granted") {
-        desktopNotificationsEnabled.value = false;
-        ElMessage.warning("系统通知权限未开启，请在系统设置中允许 CTMS 通知");
-        return;
-      }
-    }
-    const { data } = await setDesktopNotificationSubscription(enable);
-    desktopNotificationsEnabled.value = data.enabled;
-    if (data.enabled) triggerDesktopNotificationPoll();
-  } catch (error: any) {
-    desktopNotificationsEnabled.value = !Boolean(value);
-    ElMessage.error(error?.response?.data?.detail || "通知设置保存失败");
-  } finally {
-    desktopNotificationLoading.value = false;
-  }
-};
-
-const copyClientMetadata = async () => {
-  if (!navigator.clipboard?.writeText) {
-    ElMessage.warning("当前环境无法访问剪贴板");
-    return;
-  }
-  await navigator.clipboard.writeText(clientMetadataText);
-  ElMessage.success("客户端信息已复制");
-};
-
-const checkDesktopUpdateNow = async () => {
-  if (desktopUpdateChecking.value) return;
-  desktopUpdateChecking.value = true;
-  try {
-    await checkDesktopUpdateAndPrompt({ notifyWhenCurrent: true });
-  } finally {
-    desktopUpdateChecking.value = false;
-  }
-};
-
 const onSubmit = async () => {
   if (!formRef.value) return;
   await formRef.value.validate(async (valid) => {
@@ -345,7 +199,7 @@ const onSubmit = async () => {
 };
 
 const selectAndUploadAvatar = async () => {
-  const [file] = await pickFiles({
+  const [file] = await pickFilesWithFeedback({
     multiple: false,
     accept: ["png", "jpg", "jpeg", "gif", "webp"],
     title: TEXT.modules.profile.uploadAvatar,
@@ -368,7 +222,6 @@ const selectAndUploadAvatar = async () => {
 
 onMounted(() => {
   loadProfile();
-  loadDesktopNotificationSubscription().catch(() => {});
 });
 
 watch(hasUnsavedChanges, (dirty) => emit("dirty-change", dirty), { immediate: true });
@@ -483,59 +336,6 @@ watch(hasUnsavedChanges, (dirty) => emit("dirty-change", dirty), { immediate: tr
   border-top: 1px solid #e5ebf2;
 }
 
-.form-section--desktop {
-  margin-top: 26px;
-  padding-top: 28px;
-  border-top: 1px solid #e5ebf2;
-}
-
-.desktop-setting-stack {
-  display: flex;
-  flex-direction: column;
-  gap: 8px;
-}
-
-.desktop-setting-row {
-  display: flex;
-  flex-wrap: wrap;
-  align-items: center;
-  gap: 10px;
-}
-
-.desktop-setting-hint {
-  color: #7f92ad;
-  font-size: 12px;
-}
-
-.client-metadata-panel {
-  display: flex;
-  align-items: flex-start;
-  gap: 12px;
-  min-width: 0;
-}
-
-.client-metadata-list {
-  display: grid;
-  grid-template-columns: 76px minmax(0, 1fr);
-  gap: 6px 10px;
-  flex: 1;
-  min-width: 0;
-  margin: 0;
-  color: #40566f;
-  font-size: 12px;
-}
-
-.client-metadata-list dt {
-  color: #7f92ad;
-  font-weight: 700;
-}
-
-.client-metadata-list dd {
-  min-width: 0;
-  margin: 0;
-  overflow-wrap: anywhere;
-}
-
 .section-heading {
   margin-bottom: 18px;
   padding-left: 112px;