T5 products in the client's inventory

The inventory's product list (test.showInventory) gets the community products the person has: local packs, and
hub products in their library. Hiding one is answered by the proxy (and removes a hub product from the library).
When the library changes, the client is told to load its inventory again, with the server event IMVU sends
after a purchase. A product whose revision or info changes gets a new local ID, since the client keeps product
info for good; names lose characters the client's pages could take as HTML.

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

internal/products/room.go

@@ -31,6 +31,7 @@ type room struct {
 	userIDs map[int64]string                   // user -> the gateway's user_id for them, as last seen
 	missing map[string]bool                    // products others wear that aren't in the packs (logged once)
 	last    map[string][]hub.Avatar            // chat -> what the hub last said about the others in it
+	users   map[*proxy.IMQConn]string          // each connection's user queue ("/user/<id>")
 }
 
 func (r *room) init() {
@@ -41,6 +42,7 @@ func (r *room) init() {
 		r.userIDs = map[int64]string{}
 		r.missing = map[string]bool{}
 		r.last = map[string][]hub.Avatar{}
+		r.users = map[*proxy.IMQConn]string{}
 	}
 }
 
@@ -70,6 +72,9 @@ func (p *Products) Subscribed(c *proxy.IMQConn, queues []string) {
 	var joined []string
 	var rooms []string
 	for _, q := range queues {
+		if strings.HasPrefix(q, "/user/") {
+			p.room.users[c] = q
+		}
 		chat := chatOf(q)
 		if chat == "" {
 			continue
@@ -124,6 +129,7 @@ func (p *Products) Closed(c *proxy.IMQConn) {
 	p.Unsubscribed(c, queues)
 	p.roomMu.Lock()
 	delete(p.room.subs, c)
+	delete(p.room.users, c)
 	p.roomMu.Unlock()
 }
 
@@ -358,3 +364,20 @@ func (p *Products) interceptParticipant(x *proxy.Exchange) error {
 	x.Body = body
 	return nil
 }
+
+// RefreshInventory has the client load its inventory again (after the library changed), with the server event
+// IMVU sends after a purchase: "refreshInventory {}" on the user queue's web_msg mount.
+func (p *Products) RefreshInventory() {
+	p.roomMu.Lock()
+	p.room.init()
+	users := make(map[*proxy.IMQConn]string, len(p.room.users))
+	for c, q := range p.room.users {
+		users[c] = q
+	}
+	p.roomMu.Unlock()
+	for c, q := range users {
+		if err := c.Deliver(imq.Delivered{UserID: "0", Queue: q, Mount: "web_msg", Message: []byte("refreshInventory {}")}); err != nil {
+			p.logf("products: refreshing the inventory: %v", err)
+		}
+	}
+}