Fix View My Orders navigation to select orders tab

- Add query parameter support (?tab=orders) to Market Dashboard
- Update CheckoutPage to navigate with tab=orders query param
- Dashboard validates tab param against allowed values

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/modules/market/views/CheckoutPage.vue

@@ -14,7 +14,7 @@
         <Button @click="$router.push('/market')" variant="outline">
           Continue Shopping
         </Button>
-        <Button @click="$router.push('/market/dashboard')" variant="default">
+        <Button @click="$router.push('/market/dashboard?tab=orders')" variant="default">
           View My Orders
         </Button>
       </div>

src/modules/market/views/MarketDashboard.vue

@@ -62,6 +62,7 @@
 
 <script setup lang="ts">
 import { ref, computed, onMounted } from 'vue'
+import { useRoute } from 'vue-router'
 import { useMarketStore } from '@/modules/market/stores/market'
 import { Badge } from '@/components/ui/badge'
 import { 
@@ -77,10 +78,13 @@ import MerchantStore from '../components/MerchantStore.vue'
 import MarketSettings from '../components/MarketSettings.vue'
 import { auth } from '@/composables/useAuthService'
 
+const route = useRoute()
 const marketStore = useMarketStore()
 
-// Local state
-const activeTab = ref('overview')
+// Local state - check for tab query param
+const validTabs = ['overview', 'orders', 'store', 'settings']
+const initialTab = validTabs.includes(route.query.tab as string) ? route.query.tab as string : 'overview'
+const activeTab = ref(initialTab)
 
 // Computed properties for tab badges
 const orderCount = computed(() => {