fix(marketplace): filter out own store products by 0km distance

- For owners/sellers, exclude products at exactly 0km (own pharmacy)
- This correctly hides own products without needing company_id in JWT

marketplace/src/pages/ProductSearch.tsx

@@ -64,8 +64,15 @@ const ProductSearch = () => {
 
     // Filter out products from the logged-in user's pharmacy and group by name
     const groupedProducts = useMemo(() => {
-        // Filter out own products
-        const filteredProducts = products.filter(p => p.seller_id !== user?.id)
+        // Filter out own products - for owners/sellers, products at 0km are from their own store
+        const isOwnerOrSeller = user?.role === 'owner' || user?.role === 'seller'
+        const filteredProducts = products.filter(p => {
+            // Exclude products at exactly 0km distance for owners (own store)
+            if (isOwnerOrSeller && p.distance_km === 0) {
+                return false
+            }
+            return true
+        })
 
         // Group by name (case-insensitive)
         const groups: Record<string, GroupedProduct> = {}