Sweep targeted typecheck errors: 11 fixes across 9 files

- ProductImageUtility: 'CatalogPageMessageProductData.I' was clearly a
  placeholder/typo in the WALL branch — getProductCategory's first
  param is FurnitureType, so use the enclosing productType.
- YouTubePlayerView: IRoomUserData has webID, not userId. Two
  spectator/watcher-list sites used the wrong field.
- AvatarInfoWidgetView REQUEST_MANIPULATION handler: avatarInfo is
  IAvatarInfo (union); .category / .id only exist on AvatarInfoFurni.
  Type-guard before reading.
- InfoStandWidgetPetView: deleted the duplicate local 'interface
  AvatarInfoPet' — was shadowing the imported one. Drop AvatarInfoPet
  from the import (local interface stands alone).
- FurnitureExternalImageView: missing GetSessionDataManager import (the
  reportedUserId field reads it inline). Added.
- GroupCreatorView setGroupData call: null values for groupName /
  groupDescription / groupColors / groupBadgeParts where IGroupData
  expects string / number[] / GroupBadgePart[]. Empty defaults. Also
  added the previously-omitted groupHasForum field.
- ContextMenuView + WiredCreatorToolsView: 'return () =>
  ticker.remove(updateOverlays)' — Pixi Ticker.remove() returns the
  ticker, leaking the value to React's EffectCallback cleanup which
  expects 'void | (() => void)'. Wrap in block body.
- Deleted src/components/room/widgets/chat/ChatWidgetWindowView_old.tsx
  — dead code (zero references in the codebase), tripping the
  NitroCardHeaderView onCloseClick prop change.

Net tsgo error count: -11.

src/components/toolbar/YouTubePlayerView.tsx

@@ -117,10 +117,10 @@ export const YouTubePlayerView: FC<{}> = () =>
             for (let i = 0; i < 500; i++)
             {
                 const userData = roomSession.userDataManager.getUserDataByIndex(i);
-                if (userData && userData.name && userData.type === 1 && !seen.has(userData.userId))
+                if (userData && userData.name && userData.type === 1 && !seen.has(userData.webID))
                 {
-                    seen.add(userData.userId);
-                    users.push({ id: userData.userId, name: userData.name, look: userData.figure });
+                    seen.add(userData.webID);
+                    users.push({ id: userData.webID, name: userData.name, look: userData.figure });
                 }
             }
             setSpectators(users);
@@ -663,7 +663,7 @@ export const YouTubePlayerView: FC<{}> = () =>
                             const ud = rs.userDataManager.getUserData(uid);
                             if (ud && ud.name)
                             {
-                                watchers.push({ id: ud.userId, name: ud.name, look: ud.figure });
+                                watchers.push({ id: ud.webID, name: ud.name, look: ud.figure });
                             }
                         }
                     }