feat: added bmi-calculator page

src/page/json-viewer/index.tsx

@@ -78,7 +78,7 @@ export default function JsonViewer() {
         <div className="bg-white rounded-xl shadow-sm border border-slate-200 overflow-hidden flex-1 flex flex-col min-h-0">
           <div className="bg-slate-50 px-4 py-2 border-b border-slate-200 shrink-0">
             <span className="text-xs font-semibold uppercase tracking-wider text-slate-500">
-              JSON Source
+
             </span>
           </div>
           <textarea