Fix checkout success page UX flow

- Reorder template conditional logic to show success page instead of error after order placement
- Move orderPlaced state check before checkoutCart validation in CheckoutPage.vue
- Resolves issue where users saw "Cart not found" error instead of success confirmation

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/modules/market/views/CheckoutPage.vue

@@ -5,6 +5,21 @@
       <div class="animate-spin rounded-full h-12 w-12 border-b-2 border-primary"></div>
     </div>
 
+    <!-- Order Success State -->
+    <div v-else-if="orderPlaced" class="text-center py-12">
+      <CheckCircle class="w-16 h-16 text-green-600 mx-auto mb-4" />
+      <h2 class="text-2xl font-bold text-green-600 mb-4">Order Placed Successfully!</h2>
+      <p class="text-muted-foreground mb-6">Your order has been sent to the merchant. You'll receive updates as the order progresses.</p>
+      <div class="flex gap-3 justify-center">
+        <Button @click="$router.push('/market')" variant="outline">
+          Continue Shopping
+        </Button>
+        <Button @click="$router.push('/market/dashboard')" variant="default">
+          View My Orders
+        </Button>
+      </div>
+    </div>
+
     <!-- Error State -->
     <div v-else-if="error || !checkoutCart" class="text-center py-12">
       <h2 class="text-2xl font-bold text-red-600 mb-4">Checkout Error</h2>
@@ -248,22 +263,6 @@
         </CardContent>
       </Card>
 
-      <!-- Order Placed Success -->
-      <Card v-if="orderPlaced">
-        <CardContent class="text-center py-8">
-          <CheckCircle class="w-16 h-16 text-green-600 mx-auto mb-4" />
-          <h3 class="text-xl font-semibold text-foreground mb-2">Order Placed Successfully!</h3>
-          <p class="text-muted-foreground mb-6">Your order has been sent to the merchant.</p>
-          <div class="flex gap-3 justify-center">
-            <Button @click="$router.push('/market')" variant="outline">
-              Continue Shopping
-            </Button>
-            <Button @click="$router.push('/market/dashboard')" variant="default">
-              View Orders
-            </Button>
-          </div>
-        </CardContent>
-      </Card>
     </div>
   </div>
 </template>