Recently added, shop sorting, and outfit cards with T5 products

- The inventory's Recently Added puts T5 products added to the library in the last 30 days first.
- The shop's T5 listing follows its sort menu: Best Match ranks by name, Newest by upload date
  (oldest first ascending); ratings and prices (T5 products have neither) sort by newest.
- Outfit cards: outfit_products.php gets the outfit's community products added (not for sale),
  find_bundle.php is asked about IMVU's products only, and removing one in the card (remove_pids)
  keeps it from IMVU and forgets it in the outfit.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

internal/products/products_test.go

@@ -73,6 +73,14 @@ func (f *fakeIMVU) RoundTrip(r *http.Request) (*http.Response, error) {
 		return reply(`{"status": "success"}`)
 	}
 	switch r.URL.Path {
+	case "/api/outfit_products.php":
+		return reply(`{"result": {"80": {"pid": 80, "name": "Body", "is_bundleable": true}}, "bundle_id": 0}`)
+	case "/api/find_bundle.php":
+		checkSigned(true)
+		f.record("find bundle", []byte(r.URL.RawQuery))
+		return reply(`{"result": 0}`)
+	case "/api/recently_added_inventory.php":
+		return reply(`[31162856, 108363]`)
 	case "/api/shop/product.php":
 		checkSigned(false)
 		f.record("product info", body)