T5 furniture and poses in IMVU rooms (decorations)

Community products are taken out of rooms their owners save and broadcast, kept on the hub per room,
and added back when anyone with T5DE loads the room or gets its owner's broadcast; the hub's decor
notice resends the room with the new ones. Placements are stored with the hub's product ID.

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

cmd/t5de-proxy/main.go

@@ -24,6 +24,7 @@ import (
 	"log"
 	"net"
 	"net/http"
+	"net/url"
 	"os"
 	"os/exec"
 	"os/signal"
@@ -180,6 +181,20 @@ func run(logger *log.Logger, listen, ready string, parentPID int, trace bool, pa
 		prods.Want = fetcher.Want
 		prods.HubDir, prods.Owned = hubProducts, fetcher.Owned
 		prods.Shop, prods.Fetch, prods.Library = client.Products, fetcher.Ensure, fetcher.Library
+		prods.Decorations = func(ctx context.Context, instance string) ([]products.DecorItem, error) {
+			var out struct {
+				Contents []products.DecorItem `json:"contents"`
+			}
+			err := client.Call(ctx, "GET", "/api/v1/decorations/"+url.PathEscape(instance), nil, &out)
+			return out.Contents, err
+		}
+		prods.SaveDecorations = func(ctx context.Context, instance string, items []products.DecorItem) error {
+			if items == nil {
+				items = []products.DecorItem{}
+			}
+			return client.Call(ctx, "PUT", "/api/v1/decorations/"+url.PathEscape(instance), map[string]any{"contents": items}, nil)
+		}
+		client.OnDecor = prods.DecorChanged
 		prods.AddToLibrary = func(ctx context.Context, id string) error {
 			return client.Call(ctx, "PUT", "/api/v1/library/"+id, map[string]any{}, nil)
 		}