显示当前登录账号和权限

frontend/src/views/Dashboard/Dashboard.vue

@@ -461,6 +461,7 @@ const { activeSection, activeLabel, sections, selectSection } = useDashboardNavi
       <DashboardNavigation
         :active-section="activeSection"
         :sections="sections"
+        :current-user="currentUser"
         @select="selectSection"
         @settings="openSettings"
       />

frontend/src/views/Dashboard/DashboardNavigation.css

@@ -110,6 +110,30 @@
   padding-top: 22px;
 }
 
+.navigation-account {
+  display: grid;
+  gap: 5px;
+  margin: 0 8px 10px;
+  padding: 11px 12px;
+  border: 1px solid #e2e8f2;
+  border-radius: 12px;
+  background: #f8faff;
+  color: #263752;
+  overflow-wrap: anywhere;
+}
+
+.navigation-account-label,
+.navigation-account-role {
+  color: #7a879d;
+  font-size: 11px;
+  line-height: 1.4;
+}
+
+.navigation-account strong {
+  font-size: 13px;
+  line-height: 1.4;
+}
+
 .navigation-error {
   margin: 0 8px 8px;
   color: #b42318;

frontend/src/views/Dashboard/DashboardNavigation.vue

@@ -3,9 +3,16 @@ import { useAccessDenied } from "../AccessDenied/AccessDenied.js";
 
 const { loggingOut, error, logout } = useAccessDenied();
 
+const roleLabels = {
+  super_admin: "超级管理员",
+  admin: "管理员",
+  user: "普通用户",
+};
+
 defineProps({
   activeSection: { type: String, required: true },
   sections: { type: Array, required: true },
+  currentUser: { type: Object, default: null },
 });
 
 defineEmits(["select", "settings"]);
@@ -73,6 +80,13 @@ defineEmits(["select", "settings"]);
       <span>系统设置</span>
     </button>
     <div class="navigation-session">
+      <div v-if="currentUser" class="navigation-account" aria-label="当前登录账号">
+        <span class="navigation-account-label">当前登录账号</span>
+        <strong>{{ currentUser.account || "未命名账号" }}</strong>
+        <span class="navigation-account-role">
+          权限：{{ roleLabels[currentUser.role] || "未知权限" }}
+        </span>
+      </div>
       <p v-if="error" class="navigation-error" role="alert">{{ error }}</p>
       <button
         class="navigation-item navigation-logout"