feat(web): 登录页外部用户登录优先

- tab 顺序调整：外部用户 OTP 登录置前，管理员登录置后
- 移除品牌区副标题'账号申请 · SSH 密钥 · 使用审计'

web/src/views/LoginView.vue

@@ -127,29 +127,9 @@ onMounted(() => {
           <el-icon :size="26"><Monitor /></el-icon>
         </span>
         <h2>服务器用户管理节点</h2>
-        <span class="sub">账号申请 · SSH 密钥 · 使用审计</span>
       </div>
 
       <el-tabs v-model="tab" stretch @tab-change="onTabChange">
-        <!-- 管理员登录 -->
-        <el-tab-pane label="管理员登录" name="admin">
-          <el-form label-position="top" @submit.prevent="onAdminLogin">
-            <el-form-item label="用户名">
-              <el-input v-model="adminForm.username" placeholder="管理员用户名" autocomplete="username" />
-            </el-form-item>
-            <el-form-item label="密码">
-              <el-input
-                v-model="adminForm.password"
-                type="password"
-                placeholder="密码"
-                show-password
-                autocomplete="current-password"
-                @keyup.enter="onAdminLogin"
-              />
-            </el-form-item>
-            <el-button type="primary" class="auth-submit" :loading="loading" @click="onAdminLogin">登录</el-button>
-          </el-form>
-        </el-tab-pane>
 
         <!-- 外部用户 OTP 登录 -->
         <el-tab-pane label="外部用户登录" name="user">
@@ -188,6 +168,26 @@ onMounted(() => {
             <el-button type="primary" class="auth-submit" :loading="loading" @click="onUserLogin">登录</el-button>
           </el-form>
         </el-tab-pane>
+
+        <!-- 管理员登录 -->
+        <el-tab-pane label="管理员登录" name="admin">
+          <el-form label-position="top" @submit.prevent="onAdminLogin">
+            <el-form-item label="用户名">
+              <el-input v-model="adminForm.username" placeholder="管理员用户名" autocomplete="username" />
+            </el-form-item>
+            <el-form-item label="密码">
+              <el-input
+                v-model="adminForm.password"
+                type="password"
+                placeholder="密码"
+                show-password
+                autocomplete="current-password"
+                @keyup.enter="onAdminLogin"
+              />
+            </el-form-item>
+            <el-button type="primary" class="auth-submit" :loading="loading" @click="onAdminLogin">登录</el-button>
+          </el-form>
+        </el-tab-pane>
       </el-tabs>
 
       <div class="auth-foot">