立项配置页初步优化

frontend/src/views/StudyHome.vue

@@ -1,5 +1,5 @@
 <template>
-  <div class="study-home-container" v-if="study.currentStudy">
+  <div class="study-home-container unified-shell" v-if="study.currentStudy">
     <!-- 概览头部 -->
     <div class="home-header">
       <div class="header-content">
@@ -68,7 +68,7 @@
     />
 
     <!-- 通知 -->
-    <el-card class="notifications-card">
+    <el-card class="notifications-card unified-shell">
       <div class="notifications-header">
         <span class="notifications-title">{{ TEXT.modules.projectOverview.notificationsTitle }}</span>
         <span class="notifications-subtitle">{{ TEXT.modules.projectOverview.notificationsSubtitle }}</span>