feat: hide instance export and stats on mobile, desktop-only downloads

Mark export bar and summary stat cards as instance-desktop-only. Hide all CSV/MD export actions on phone across four exchange instances.

Co-authored-by: Cursor <cursoragent@cursor.com>

static/instance_theme.css

@@ -1,40 +1,65 @@
-/* 实例页手机端：顶栏统计精简 */
+/* 实例页手机端：与中控一致，桌面专属区块隐藏；下载仅电脑端 */
 @media (max-width: 720px) {
-  .stat-box > .stat-item-desktop-only {
+  .instance-desktop-only {
     display: none !important;
   }
 
-  .stat-box {
+  a[href^="/export/"] {
+    display: none !important;
+  }
+
+  button[onclick*="exportDailyBundleMd"],
+  button[onclick*="exportWeeklyBundleMd"] {
+    display: none !important;
+  }
+
+  body {
+    padding: 8px 10px !important;
+  }
+
+  .header h1 {
+    font-size: 1rem !important;
+    line-height: 1.35;
+  }
+
+  .header-row {
+    flex-wrap: wrap;
     gap: 8px;
-    margin-bottom: 12px;
   }
 
-  .stat-box > .stat-item:last-child:nth-child(odd) {
-    grid-column: 1 / -1;
+  .top-nav {
+    display: flex;
+    flex-wrap: nowrap;
+    overflow-x: auto;
+    -webkit-overflow-scrolling: touch;
+    scrollbar-width: none;
+    gap: 6px;
+    padding-bottom: 2px;
   }
 
-  .stat-item {
-    min-height: 64px;
-    padding: 10px 8px;
-  }
-
-  .stat-item .value {
-    font-size: 1.1rem;
-  }
-
-  .export-bar > span:first-child {
+  .top-nav::-webkit-scrollbar {
     display: none;
   }
 
-  .export-bar {
-    gap: 6px;
-    margin-bottom: 10px;
+  .top-nav a {
+    flex: 0 0 auto;
+    white-space: nowrap;
+    padding: 8px 12px;
+    font-size: 0.78rem;
   }
 
-  .export-bar a {
-    flex: 1 1 auto;
-    text-align: center;
-    min-width: 0;
+  .list-window-bar {
+    flex-direction: column;
+    align-items: stretch;
+    gap: 8px;
+  }
+
+  .grid {
+    gap: 10px;
+  }
+
+  .card {
+    padding: 12px;
   }
 }