style: apply legacy shell across student pages

apps/taro/src/pages/student/student.css

@@ -1372,7 +1372,8 @@
 
 @media (min-width: 900px) {
   .student-page {
-    max-width: 900px;
+    width: 100%;
+    max-width: 1180px;
     margin: 0 auto;
     padding: 36px;
   }
@@ -1385,6 +1386,30 @@
     font-size: 42px;
   }
 
+  .student-topbar {
+    padding: 24px 28px;
+    border: 1px solid rgba(226, 232, 240, 0.9);
+    border-radius: 28px;
+    background: rgba(255, 255, 255, 0.88);
+    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.05);
+  }
+
+  .student-page > .toolbar,
+  .student-page > .section-block > .toolbar {
+    padding: 14px;
+    border: 1px solid var(--tiku-border);
+    border-radius: 24px;
+    background: #fff;
+    box-shadow: var(--tiku-shadow);
+  }
+
+  .quiet-panel,
+  .report-panel,
+  .scoreline-filter-panel,
+  .asset-preview-panel {
+    border-radius: 28px;
+  }
+
   .answer-sheet {
     grid-template-columns: repeat(10, minmax(0, 1fr));
   }