fix: fix feed component size

app/(app)/page.tsx

@@ -27,7 +27,11 @@ export default function HomePage() {
 
   if (user) {
     return (
-      <main className="flex-1 max-w-2xl w-full mx-auto px-4 sm:px-6 py-6">
+      // Narrower single-column feed on desktop (≈Instagram width) — the cards
+      // are fluid, so the column width is what sizes the square media. On
+      // mobile this max-width is wider than the viewport, so it's full-bleed
+      // as before.
+      <main className="flex-1 max-w-lg w-full mx-auto px-4 sm:px-6 py-6">
         <div className="mb-6">
           <SadhnaStreakCTA />
         </div>