Tweak paywall close button spacing.

Add a little extra top padding to the top bar so the close action feels visually balanced.

Co-authored-by: Cursor <cursoragent@cursor.com>

google_apps/PremiumFeaturesView.swift

@@ -81,7 +81,8 @@ struct PremiumFeaturesView: View {
 
                     paywallTopBar
                         .padding(.horizontal, useWideLayout ? 22 : 16)
-                        .padding(.vertical, 12)
+                        .padding(.top, 18)
+                        .padding(.bottom, 12)
                 }
             }
         }