fix: react-doctor control-has-associated-label 137→? (auto aria-labels)

Add aria-label to buttons (icon-only, pagination, action) and inputs
(placeholder-derived) via balanced-brace JSX parser. Files with complex
onClick expressions (deep brace nesting) skipped to avoid breakage.

src/components/admin/ReportsDashboard.tsx

@@ -682,7 +682,7 @@ export default function ReportsDashboard({
               <h3 className="font-semibold text-white">AI Report Analysis</h3>
               <span className="text-xs text-violet-200 ml-1">· {activeTab.replace("-", " ")}</span>
             </div>
-            <button type="button" onClick={closeExplanation} className="text-violet-200 hover:text-white p-1">
+            <button type="button" onClick={closeExplanation} className="text-violet-200 hover:text-white p-1" aria-label="Close">
               <svg className="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                 <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
               </svg>