功能(提醒)：统一项目提醒中心与桌面通知链路

增加通用提醒状态、数据库迁移和定时同步，覆盖风险时效、文件回执、项目里程碑、访视窗口与协作申请。

新增网页端和桌面端提醒中心、真实投递诊断与固定隐私通知正文，并补齐登录来源聚合、测试和说明文档。

frontend/src/components/Layout.desktop.test.ts

@@ -15,6 +15,7 @@ const readTauriLibSource = () => readSource(resolve(__dirname, "../../src-tauri/
 const readDesktopPreferencesSource = () => readSource(resolve(__dirname, "../views/DesktopPreferences.vue"));
 const readDesktopServerSettingsSource = () => readSource(resolve(__dirname, "../views/DesktopServerSettings.vue"));
 const readDesktopUpdateManagerSource = () => readSource(resolve(__dirname, "../session/desktopUpdateManager.ts"));
+const readDesktopNotificationManagerSource = () => readSource(resolve(__dirname, "../session/desktopNotificationManager.ts"));
 const readDesktopActivityCenterSource = () => readSource(resolve(__dirname, "../session/desktopActivityCenter.ts"));
 const readProfileSettingsSource = () => readSource(resolve(__dirname, "../views/ProfileSettings.vue"));
 const readLoginSource = () => readSource(resolve(__dirname, "../views/Login.vue"));
@@ -484,9 +485,10 @@ describe("desktop layout shell", () => {
     expect(navigation).toContain("item.children?.length ? item.children : [item]");
   });
 
-  it("keeps notification and update preferences lightweight", () => {
+  it("shows the real notification delivery path and keeps native notification access constrained", () => {
     const serverSettings = readDesktopServerSettingsSource();
     const preferences = readDesktopPreferencesSource();
+    const desktopNotificationManager = readDesktopNotificationManagerSource();
     const desktopUpdateManager = readDesktopUpdateManagerSource();
     const desktopLayout = readDesktopLayoutSource();
 
@@ -503,17 +505,25 @@ describe("desktop layout shell", () => {
     expect(preferences).not.toContain("服务器连通性正常");
     expect(preferences).not.toContain("服务器连接已确认");
     expect(preferences).toContain("auth.logout({ rememberCurrentStudy: false })");
-    expect(preferences).not.toContain("系统通知已开启");
-    expect(preferences).not.toContain("系统通知已关闭");
-    expect(preferences).not.toContain("已授权");
-    expect(preferences).toContain("showNotificationPermissionTag");
+    expect(preferences).toContain("系统权限：{{ notificationPermissionText }}");
+    expect(preferences).toContain("服务端订阅");
+    expect(preferences).toContain("真实业务路径");
+    expect(preferences).toContain("授权并开启");
+    expect(preferences).toContain("重新检测权限");
+    expect(preferences).toContain("立即检查业务提醒");
+    expect(preferences).toContain("系统设置 → 通知 → CTMS");
+    expect(preferences).toContain("设置 → 系统 → 通知 → CTMS");
     expect(preferences).toContain("showSystemNotificationProbe");
     expect(preferences).toContain("sendDesktopNotificationTest");
-    expect(preferences).toContain("测试通知");
-    expect(preferences).not.toContain("通知诊断");
+    expect(preferences).toContain("发送测试通知");
+    expect(preferences).toContain("openProjectNotificationCenter");
+    expect(preferences).toContain("listenDesktopNotificationStatus");
     expect(preferences).not.toContain("更新诊断");
-    expect(preferences).not.toContain("listenDesktopNotificationDiagnostics");
     expect(preferences).not.toContain(["@tauri-apps", "plugin-notification"].join("/"));
+    expect(desktopNotificationManager).toContain("claimDesktopNotifications");
+    expect(desktopNotificationManager).toContain("acknowledgeDesktopNotifications");
+    expect(desktopNotificationManager).toContain('state: "permission-required"');
+    expect(desktopNotificationManager).toContain('state: deliveredIds.length ? "delivered" : "ready"');
     expect(preferences).toContain("listenDesktopUpdateStatus");
     expect(preferences).toContain("promptForPendingDesktopUpdate");
     expect(preferences).toContain("当前已是最新版本");
@@ -603,6 +613,10 @@ describe("desktop layout shell", () => {
     expect(styles).toContain(".desktop-workbench .desktop-route-shell .el-table td.el-table__cell");
     expect(styles).toContain("padding: 7px 10px;");
     expect(styles).toContain(".desktop-workbench .desktop-route-shell .el-pagination");
+    expect(styles).toContain(".desktop-workbench .desktop-route-shell .el-radio-button__inner");
+    expect(styles).toContain("display: inline-flex;");
+    expect(styles).toContain("align-items: center;");
+    expect(styles).toContain("justify-content: center;");
     expect(styles).toContain(".desktop-workbench .desktop-route-shell .el-drawer__body");
     expect(styles).toContain(":root[data-ctms-theme=\"dark\"] .desktop-workbench .desktop-route-shell .hero-stat");
   });