feat: branding furni image position editor (move + scale)

Adds an "Editor Posizione" button to the furni infostand action bar for
branding / MPU furni, opening a dialog to position and zoom the image:
- draggable dot moves offsetX/Y (live, local preview only)
- slider zooms the image (scale, via the renderer's per-sprite scale)
- offsetZ kept as z-index; Save persists + broadcasts via SetObjectData
- radio "Live" + all editor labels go through LocalizeText (external texts)

Pairs with the renderer branding scale/offset support and Arcturus' `scale`
default on InteractionRoomAds.

src/components/radio/RadioView.tsx

@@ -76,7 +76,7 @@ export const RadioView: FC<{}> = () =>
                     <div className="mt-0.5 flex items-center gap-1.5">
                         { selectedPlaying &&
                             <span className="flex items-center gap-1 text-[9px] font-bold uppercase tracking-wide text-sky-400">
-                                <span className="h-1.5 w-1.5 rounded-full bg-sky-400" /> Live
+                                <span className="h-1.5 w-1.5 rounded-full bg-sky-400" /> { LocalizeText('radio.live') }
                             </span> }
                         { selected?.genre &&
                             <span className="truncate text-[10px] text-white/45">{ selected.genre }</span> }