fix: add headroom to dashboard bar scales

LianSyn-platform/index.html

@@ -5,7 +5,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <meta name="theme-color" content="#edf2f4">
     <title>AI操作台 · LianSyn-platform</title>
-      <link rel="stylesheet" href="styles.css?v=20260902-dashboard-bar-chart-1">
+      <link rel="stylesheet" href="styles.css?v=20260902-dashboard-nice-scale-1">
   </head>
   <body>
     <main class="app-shell">
@@ -397,6 +397,6 @@
       </section>
 
     </main>
-  <script src="app.js?v=20260902-dashboard-bar-chart-1"></script>
+  <script src="app.js?v=20260902-dashboard-nice-scale-1"></script>
   </body>
 </html>