Improve responsiveness and adjust button sizes for better mobile experience

Update padding and button sizes across various components to enhance mobile view and optimize user interaction.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/pCkJ6mk

client/src/pages/dashboard.tsx

@@ -27,7 +27,7 @@ export default function Dashboard() {
       <main className="flex-1 overflow-y-auto">
         <TopBar onMenuClick={() => setSidebarOpen(!sidebarOpen)} />
         
-        <div className="p-8 space-y-8 max-w-[1600px] mx-auto">
+        <div className="p-4 sm:p-6 lg:p-8 space-y-6 sm:space-y-8 max-w-[1600px] mx-auto">
           <StatsCards />
           
           <RecentPublications />