Code review and fixes

client/src/components/Dashboard.jsx

@@ -29,7 +29,8 @@ function isAtRisk(points) {
   return boundary !== null && (boundary - points) <= AT_RISK_THRESHOLD;
 }
 
-// Media query hook
+// TODO [MAJOR #8]: Same hook is defined in App.jsx — extract to src/hooks/useMediaQuery.js
+// Also: `matches` in the dep array can cause a loop on strict-mode initial mount.
 function useMediaQuery(query) {
   const [matches, setMatches] = useState(false);
   useEffect(() => {
@@ -186,6 +187,7 @@ export default function Dashboard() {
 
   return (
     <>
+      {/* TODO [MAJOR #9]: Same mobileStyles block exists in App.jsx. Move to mobile.css */}
       <style>{mobileStyles}</style>
       <div style={s.wrap} className="dashboard-wrap">
         <div style={s.header} className="dashboard-header">