tweak(app): tighten prompt dock padding

packages/app/src/pages/session/session-prompt-dock.tsx

@@ -174,11 +174,11 @@ export function SessionPromptDock(props: {
     <div
       ref={props.setPromptDockRef}
       data-component="session-prompt-dock"
-      class="shrink-0 w-full pb-4 flex flex-col justify-center items-center bg-background-stronger pointer-events-none"
+      class="shrink-0 w-full pb-3 flex flex-col justify-center items-center bg-background-stronger pointer-events-none"
     >
       <div
         classList={{
-          "w-full px-4 pointer-events-auto": true,
+          "w-full px-3 pointer-events-auto": true,
           "md:max-w-200 md:mx-auto 2xl:max-w-[1000px]": props.centered,
         }}
       >