Add Discord collectibles IPC and bump cinny for profile overlays.

Wire electron-side catalog fetch and asset download, exposing collectibles APIs to the renderer for live Discord shop browsing and Matrix profile uploads.

electron/preload.js

@@ -193,7 +193,16 @@ contextBridge.exposeInMainWorld('electron', {
   protocol: {
     getStatus: () => ipcRenderer.invoke('protocol:get-status'),
     repair: () => ipcRenderer.invoke('protocol:repair')
-  }
+  },
+
+  // Discord shop collectibles (catalog + on-demand CDN download)
+  discordCollectibles: {
+    hasToken: () => ipcRenderer.invoke('discord-collectibles:has-token'),
+    setToken: (token) => ipcRenderer.invoke('discord-collectibles:set-token', { token }),
+    clearToken: () => ipcRenderer.invoke('discord-collectibles:clear-token'),
+    fetchCatalog: (force = false) => ipcRenderer.invoke('discord-collectibles:fetch-catalog', { force }),
+    downloadAssets: (assets) => ipcRenderer.invoke('discord-collectibles:download-assets', { assets }),
+  },
 });
 
 // Preload script ready