优化登录页UI、新增占满布局类

frontend/src/views/admin/ProjectMembers.vue

@@ -1,6 +1,6 @@
 <template>
   <div class="page">
-    <el-card shadow="never" class="main-content-card unified-shell">
+    <div class="main-content-flat unified-shell">
       <div class="unified-action-bar actions-only-bar">
         <div class="filter-spacer"></div>
         <el-button type="primary" @click="openAdd">
@@ -8,7 +8,7 @@
         </el-button>
       </div>
       <div class="unified-section member-table-section">
-        <el-table :data="memberRows" v-loading="loading" stripe>
+        <el-table :data="memberRows" v-loading="loading" stripe class="member-table">
           <el-table-column prop="full_name" :label="TEXT.modules.adminProjectMembers.username" min-width="160" />
           <el-table-column prop="role_in_study" :label="TEXT.modules.adminProjectMembers.projectRole" min-width="140">
             <template #default="scope">
@@ -62,7 +62,7 @@
           </el-table-column>
         </el-table>
       </div>
-    </el-card>
+    </div>
 
     <el-dialog append-to=".layout-main .content-wrapper" :title="TEXT.modules.adminProjectMembers.newTitle" width="520px" v-model="addVisible" :close-on-click-modal="false">
       <el-form :model="newMember" label-width="120px" ref="addFormRef" :rules="addRules">
@@ -301,6 +301,20 @@ onMounted(async () => {
 .page {
   display: flex;
   flex-direction: column;
+  gap: 0;
+}
+
+.main-content-flat {
+  width: 100%;
+  background: transparent;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+  padding: 0;
+}
+
+.main-content-flat :deep(.el-card__body) {
+  padding: 0;
 }
 
 .actions-only-bar {
@@ -310,8 +324,11 @@ onMounted(async () => {
 }
 
 .member-table-section {
-  padding-top: 12px;
-  padding-bottom: 12px;
+  padding: 0;
+}
+
+.member-table :deep(.el-table__inner-wrapper::before) {
+  display: none;
 }
 
 .hint {