Show T5 products in the client's shop; keep float IDs and unknown paths off IMVU

The shop's T5 filter (maturity_rating "t5") is answered from the hub's products, fetched so they can be
shown and tried on; buying T5 products adds them to the hub library, and product.php details for
community products are answered here.

The client sends some product IDs as floats ("2000000008.0"): product.php passed the worn community
product to IMVU that way. Every ID is now read either way, and products.Guard refuses any request to
IMVU that still names a local ID given out. T5DE_PROXY_DUMP logs request and response bodies.

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

internal/products/chat.go

@@ -2,7 +2,6 @@ package products
 
 import (
 	"encoding/json"
-	"strconv"
 	"strings"
 )
 
@@ -34,15 +33,15 @@ func stripCommand(text string, isCommunity func(int64) bool) strippedCommand {
 	r := strippedCommand{text: text}
 	kept := []string{fields[0]}
 	for _, f := range fields[1:] {
-		id, err := strconv.ParseInt(f, 10, 64)
-		if err == nil && id == bodyProduct && fields[0] == "*use" {
+		id, ok := parseID(f)
+		if ok && id == bodyProduct && fields[0] == "*use" {
 			r.outfit = true
 		}
-		if err == nil && isCommunity(id) {
+		if ok && isCommunity(id) {
 			r.products = append(r.products, id)
 			continue
 		}
-		if err == nil {
+		if ok {
 			r.kept = append(r.kept, id)
 		}
 		kept = append(kept, f)