app: remove extra x padding around prompt input on mobile

packages/app/src/pages/session.tsx

@@ -2630,7 +2630,7 @@ export default function Page() {
           {/* Prompt input */}
           <div
             ref={(el) => (promptDock = el)}
-            class="absolute inset-x-0 bottom-0 pt-12 pb-4 flex flex-col justify-center items-center z-50 px-4 md:px-0 bg-gradient-to-t from-background-stronger via-background-stronger to-transparent pointer-events-none"
+            class="absolute inset-x-0 bottom-0 pt-12 pb-4 flex flex-col justify-center items-center z-50 bg-gradient-to-t from-background-stronger via-background-stronger to-transparent pointer-events-none"
           >
             <div
               classList={{