style: 优化个人中心和偏好设置弹窗样式，重构工作入口为精致分屏布局并移除首字徽标

frontend/src/router/index.ts

@@ -11,6 +11,8 @@ import Login from "../views/Login.vue";
 import Register from "../views/Register.vue";
 import ForgotPassword from "../views/ForgotPassword.vue";
 import DesktopServerSettings from "../views/DesktopServerSettings.vue";
+import DesktopProjectEntry from "../views/DesktopProjectEntry.vue";
+import DesktopSessionRestore from "../views/DesktopSessionRestore.vue";
 import StudyHome from "../views/StudyHome.vue";
 import FaqDetail from "../views/FaqDetail.vue";
 import AuditLogs from "../views/admin/AuditLogs.vue";
@@ -57,6 +59,8 @@ import SubjectForm from "../views/subjects/SubjectForm.vue";
 import SubjectDetail from "../views/subjects/SubjectDetail.vue";
 import { TEXT } from "../locales";
 import { resolveDesktopRouteRedirect } from "./desktopGuard";
+import { isTauriRuntime } from "../runtime";
+import { DESKTOP_SESSION_RESTORE_PATH, shouldPreserveDesktopSessionOnAuthCheckFailure } from "../session/authRecovery";
 
 const SYSTEM_PERMISSION_READ = "system:permissions:read";
 const SYSTEM_PERMISSION_PROJECT_CONFIG = "system:permissions:project_config";
@@ -86,6 +90,18 @@ const routes: RouteRecordRaw[] = [
     component: DesktopServerSettings,
     meta: { public: true, title: "服务器设置" },
   },
+  {
+    path: DESKTOP_SESSION_RESTORE_PATH,
+    name: "DesktopSessionRestore",
+    component: DesktopSessionRestore,
+    meta: { public: true, title: "恢复登录状态" },
+  },
+  {
+    path: "/desktop/project-entry",
+    name: "DesktopProjectEntry",
+    component: DesktopProjectEntry,
+    meta: { title: "选择工作入口" },
+  },
   {
     path: "/",
     component: Layout,
@@ -512,6 +528,7 @@ const ensureProjectPermissionAccess = async (
 };
 
 router.beforeEach(async (to, _from, next) => {
+  const isDesktopRuntime = isTauriRuntime();
   const desktopRedirect = resolveDesktopRouteRedirect(to);
   if (desktopRedirect) {
     next({ path: desktopRedirect });
@@ -522,10 +539,15 @@ router.beforeEach(async (to, _from, next) => {
   const studyStore = useStudyStore();
   const getToken = () => auth.token;
   let token = getToken();
-  if (!auth.user && getToken()) {
+  const isDesktopSessionRestoreRoute = to.path === DESKTOP_SESSION_RESTORE_PATH;
+  if (!auth.user && getToken() && !isDesktopSessionRestoreRoute) {
     try {
-      await auth.fetchMe();
-    } catch {
+      await auth.fetchMe({ disableNetworkRetry: true, suppressErrorMessage: true });
+    } catch (error) {
+      if (isDesktopRuntime && shouldPreserveDesktopSessionOnAuthCheckFailure(error)) {
+        next({ path: DESKTOP_SESSION_RESTORE_PATH, query: { redirect: to.fullPath } });
+        return;
+      }
       // 有 token 但无法获取用户，强制回登录，避免进入“无用户上下文”页面
       await auth.logout();
       next({ path: "/login" });
@@ -534,7 +556,11 @@ router.beforeEach(async (to, _from, next) => {
   }
   token = getToken();
   const isAdmin = isSystemAdmin(auth.user);
-  if (token && !studyStore.currentStudy) {
+  if (!to.meta.public && !token) {
+    next({ path: "/login" });
+    return;
+  }
+  if (token && !studyStore.currentStudy && !isDesktopRuntime) {
     if (isAdmin) {
       await studyStore.ensureDefaultActiveStudy();
     } else {
@@ -544,8 +570,22 @@ router.beforeEach(async (to, _from, next) => {
   if (token && studyStore.currentStudy && auth.user?.email) {
     studyStore.rememberCurrentStudyForUser(auth.user.email);
   }
-  if (!to.meta.public && !token) {
-    next({ path: "/login" });
+
+  if (isDesktopRuntime && token && to.path === "/desktop/project-entry" && studyStore.currentStudy) {
+    studyStore.clearCurrentStudy();
+  }
+
+  if (isDesktopRuntime && token && !isAdmin && to.path.startsWith("/admin")) {
+    next({ path: "/desktop/project-entry" });
+    return;
+  }
+
+  if (isDesktopRuntime && token && isAdmin && to.path.startsWith("/admin") && studyStore.currentStudy) {
+    studyStore.clearCurrentStudy();
+  }
+
+  if (isDesktopRuntime && token && to.path === "/") {
+    next({ path: studyStore.currentStudy ? "/project/overview" : "/desktop/project-entry" });
     return;
   }
   if (isAdmin && to.path === "/") {
@@ -554,6 +594,10 @@ router.beforeEach(async (to, _from, next) => {
   }
   if ((to.path === "/login" || to.path === "/register") && token) {
     if (!auth.forceLogin) {
+      if (isDesktopRuntime) {
+        next({ path: "/desktop/project-entry" });
+        return;
+      }
       next({
         path: isAdmin
           ? studyStore.currentStudy
@@ -621,7 +665,7 @@ router.beforeEach(async (to, _from, next) => {
     }
   }
   if (to.meta.requiresStudy && !studyStore.currentStudy) {
-    next({ path: isAdmin ? "/admin/users" : "/admin/projects" });
+    next({ path: isDesktopRuntime ? "/desktop/project-entry" : isAdmin ? "/admin/users" : "/admin/projects" });
     return;
   }
   if (to.meta.requiresStudy && studyStore.currentStudy) {