修复磁盘统计的BUG

public/js/app.js

@@ -85,7 +85,9 @@
     sourceFilter: document.getElementById('sourceFilter'),
     btnResetSort: document.getElementById('btnResetSort'),
     detailPartitionsContainer: document.getElementById('detailPartitionsContainer'),
-    detailPartitionsList: document.getElementById('detailPartitionsList')
+    detailPartitionsList: document.getElementById('detailPartitionsList'),
+    partitionSummary: document.getElementById('partitionSummary'),
+    partitionHeader: document.getElementById('partitionHeader')
   };
 
   // ---- State ----
@@ -876,6 +878,14 @@
     // Render partitions list if any
     if (data.partitions && data.partitions.length > 0) {
         dom.detailPartitionsContainer.style.display = 'block';
+        dom.partitionSummary.textContent = `${data.partitions.length} 个本地分区`;
+        
+        // Remove old listener if any and add new toggle listener
+        dom.partitionHeader.onclick = (e) => {
+            e.stopPropagation();
+            dom.detailPartitionsContainer.classList.toggle('active');
+        };
+
         dom.detailPartitionsList.innerHTML = data.partitions.map(p => `
             <div class="partition-row">
                 <div class="partition-info">