Layout changes, fix bugs in new entry page

lib/components/dashboard/leaderboard_panel.dart

@@ -16,23 +16,24 @@ class LeaderboardPanel extends StatelessWidget {
         child: Center(child: CircularProgressIndicator()),
       );
     }
-    return Padding(
-      padding: const EdgeInsets.all(10.0),
-      child: Card(
+    return Card(
+      clipBehavior: Clip.antiAlias,
+      child: Padding(
+        padding: const EdgeInsets.all(16),
         child: Column(
-          mainAxisAlignment: MainAxisAlignment.center,
+          crossAxisAlignment: CrossAxisAlignment.stretch,
           children: [
             Text(
               "Leaderboard",
               style: TextStyle(
-                fontSize: 24,
+                fontSize: 18,
                 fontWeight: FontWeight.bold,
-                decoration: TextDecoration.underline,
               ),
             ),
+            const SizedBox(height: 8),
             if (leaderboard.isEmpty)
               const Padding(
-                padding: EdgeInsets.all(16.0),
+                padding: EdgeInsets.all(8.0),
                 child: Text('No leaderboard data yet'),
               )
             else
@@ -46,7 +47,7 @@ class LeaderboardPanel extends StatelessWidget {
                       margin: const EdgeInsets.symmetric(
                           horizontal: 0, vertical: 8),
                       child: Padding(
-                        padding: const EdgeInsets.all(8),
+                        padding: const EdgeInsets.symmetric(vertical: 6),
                         child: Row(
                           mainAxisAlignment: MainAxisAlignment.spaceBetween,
                           children: [