style(auth): remove left brand panel for cleaner login page

Author: yyyCode

vue/src/assets/blog.css

@@ -3606,8 +3606,7 @@ body {
 }
 
 .auth-split-card {
-  display: flex;
-  width: 780px;
+  width: 420px;
   max-width: 100%;
   background: #fff;
   border-radius: 12px;
@@ -3664,10 +3663,8 @@ body {
   margin-top: 40px;
 }
 
-/* Form panel (right) */
+/* Form panel */
 .auth-form {
-  flex: 1;
-  min-width: 0;
   padding: 48px 44px;
 }
 

vue/src/views/SiteAuthView.vue

@@ -1,15 +1,6 @@
 <template>
   <div class="auth-split-bg">
     <div class="auth-split-card">
-      <!-- Left: Brand Panel -->
-      <div class="auth-brand">
-        <div class="auth-brand-logo">📝</div>
-        <div class="auth-brand-title">OpenBlog</div>
-        <div class="auth-brand-sub">{{ brandSubtitle }}</div>
-        <div class="auth-brand-footer">&copy; 2026 OpenBlog</div>
-      </div>
-
-      <!-- Right: Form Area -->
       <div class="auth-form">
         <!-- Underline Tabs -->
         <div class="auth-tabs" role="tablist" aria-label="登录、注册或修改密码">