Enhance product handling in MerchantStore and useMarket

- Enriched products with stall names in MerchantStore, ensuring each product displays the associated stall name or 'Unknown Stall' if not available.
- Updated product addition logic in useMarket to include stall names, improving clarity and consistency across the application.
- Enhanced error handling for product loading to maintain robust functionality.

These changes improve the user experience by providing clearer product information in the market interface.

src/modules/market/components/MerchantStore.vue

@@ -516,7 +516,17 @@ const loadStallProducts = async () => {
       inkey,
       activeStall.value.id!
     )
-    stallProducts.value = products || []
+    // Enrich products with stall name
+    const enrichedProducts = (products || []).map(product => ({
+      ...product,
+      stallName: activeStall.value?.name || 'Unknown Stall'
+    }))
+    stallProducts.value = enrichedProducts
+
+    // Also add them to the market store so they appear in the main market
+    enrichedProducts.forEach(product => {
+      marketStore.addProduct(product)
+    })
   } catch (error) {
     console.error('Failed to load products:', error)
     stallProducts.value = []

src/modules/market/composables/useMarket.ts

@@ -289,10 +289,16 @@ export function useMarket() {
 
         try {
           const productData = JSON.parse(latestEvent.content)
+          const stallId = productData.stall_id || 'unknown'
+
+          // Look up the stall name from the stalls array
+          const stall = marketStore.stalls.find(s => s.id === stallId)
+          const stallName = stall?.name || 'Unknown Stall'
+
           const product = {
             id: productId,
-            stall_id: productData.stall_id || 'unknown',
-            stallName: productData.stallName || 'Unknown Stall',
+            stall_id: stallId,
+            stallName: stallName,
             name: productData.name || 'Unnamed Product',
             description: productData.description || '',
             price: productData.price || 0,
@@ -468,10 +474,16 @@ export function useMarket() {
       const productId = event.tags.find((tag: any) => tag[0] === 'd')?.[1]
       if (productId) {
         const productData = JSON.parse(event.content)
+        const stallId = productData.stall_id || 'unknown'
+
+        // Look up the stall name from the stalls array
+        const stall = marketStore.stalls.find(s => s.id === stallId)
+        const stallName = stall?.name || 'Unknown Stall'
+
         const product = {
           id: productId,
-          stall_id: productData.stall_id || 'unknown',
-          stallName: productData.stallName || 'Unknown Stall',
+          stall_id: stallId,
+          stallName: stallName,
           pubkey: event.pubkey,
           name: productData.name || 'Unnamed Product',
           description: productData.description || '',