fix(admin): 登录样式构建修复——flex-cc换核心工具类，注册/忘记密码页补固定浅色

Co-Authored-By: Claude Code <noreply@anthropic.com>

admin/src/views/auth/forget-password/index.vue

@@ -2,7 +2,7 @@
   <div class="flex w-full h-screen">
     <LoginLeftView />
 
-    <div class="relative flex-1">
+    <div class="relative flex-1 auth-right-bg">
       <AuthTopBar />
 
       <div class="auth-right-wrap">

admin/src/views/auth/login/style.css

@@ -12,6 +12,8 @@
   --el-border-color: #dcdfe6;
   --el-border-color-light: #e4e7ed;
   --el-border-color-lighter: #ebeef5;
+  /* 滑块暗色边框环修正（ArtDragVerify 内部使用） */
+  --default-border-dashed: #dbdfe9;
   background-color: #f7f8fa;
 }
 
@@ -37,6 +39,10 @@
     @apply !h-[56px];
   }
 
+  .login-form {
+    margin-top: 25px;
+  }
+
   /* 表单标签样式 */
   :deep(.el-form-item__label) {
     color: #1a1a1a;
@@ -45,7 +51,7 @@
 
   /* 账号由管理员分配 */
   .admin-assigned {
-    @apply flex-cc gap-3 mt-8;
+    @apply flex items-center justify-center gap-3 mt-8;
 
     .line {
       @apply inline-block w-6 h-px bg-[#D3D9E3];

admin/src/views/auth/register/index.vue

@@ -3,7 +3,7 @@
   <div class="flex w-full h-screen">
     <LoginLeftView />
 
-    <div class="relative flex-1">
+    <div class="relative flex-1 auth-right-bg">
       <AuthTopBar />
 
       <div class="auth-right-wrap">