fix: calculate

components/animate/ExportPanel.tsx

@@ -36,7 +36,7 @@ function CodeBlock({ code, filename }: { code: string; filename: string }) {
   return (
     <div className="space-y-2">
       <div className="relative group rounded-xl overflow-hidden border border-white/5" style={{ background: '#06060e' }}>
-        <pre className="p-4 overflow-x-auto font-mono text-[11px] text-white/55 leading-relaxed max-h-64">
+        <pre className="p-4 overflow-x-auto font-mono text-[11px] text-white/55 leading-relaxed max-h-64 scrollbar">
           <code>{code}</code>
         </pre>
       </div>

components/calculate/GraphPanel.tsx

@@ -107,11 +107,6 @@ export function GraphPanel() {
         <GraphCanvas functions={graphFunctions} variables={variables} />
       </div>
 
-      {/* ── Hint bar ─────────────────────────────────────────── */}
-      <p className="text-[10px] text-muted-foreground/35 text-center shrink-0 pb-1">
-        Drag to pan &nbsp;·&nbsp; Scroll to zoom &nbsp;·&nbsp; Hover for coordinates
-      </p>
-
     </div>
   );
 }