fix: add min-height 64px to nav for mobile icon clearance

Author: Partha-dev01

app/globals.css

@@ -168,6 +168,7 @@ body {
 /* ── Nav ── */
 .nav {
   padding: 20px 32px;
+  min-height: 64px;
   display: flex;
   align-items: center;
   justify-content: space-between;