feat(miniapp): simplify ready state layout

apps/miniapp/src/index.css

@@ -279,6 +279,11 @@ button {
   margin-top: 16px;
 }
 
+.content-stack {
+  display: grid;
+  gap: 12px;
+}
+
 .panel {
   border-radius: 24px;
   padding: 18px;
@@ -312,6 +317,10 @@ button {
   border-color: rgb(247 179 137 / 0.28);
 }
 
+.profile-card {
+  gap: 10px;
+}
+
 .balance-item header,
 .ledger-item header,
 .activity-row header,
@@ -679,6 +688,7 @@ button {
 
 .panel-toolbar {
   display: flex;
+  flex-wrap: wrap;
   justify-content: flex-end;
   margin-top: 12px;
 }
@@ -893,10 +903,6 @@ button {
     padding: 32px 24px 40px;
   }
 
-  .content-grid {
-    grid-template-columns: 1.3fr 1fr 1fr;
-  }
-
   .home-grid {
     grid-template-columns: repeat(4, minmax(0, 1fr));
   }