feat: rebuild desktop sync as linked server accounts, fix packaged plugin bundles and UI scaling

src/ui/plugin-host/desktop.ts

@@ -1,24 +1,14 @@
-/** app.desktop: the desktop app's remote sync connection, for plugins. */
+/** app.desktop: the server this desktop is linked to, for plugins. */
 
-import { isElectron } from "@/lib/electron";
+import { getLinkedSession } from "@/lib/linked-server";
+import { SYNC_CHANGED_EVENT } from "@/lib/sync-events";
 
 export async function remoteServerUrl(): Promise<string | null> {
-  if (!isElectron()) return null;
-  try {
-    const config = (await window.electronAPI?.invoke?.(
-      "get-remote-sync-config",
-    )) as { serverUrl?: string } | null | undefined;
-    return config?.serverUrl || null;
-  } catch {
-    return null;
-  }
+  return (await getLinkedSession())?.serverUrl ?? null;
 }
 
 export function onRemoteServerChange(listener: () => void): () => void {
-  const unsubscribe = window.electronAPI?.onRemoteSyncStatusChanged?.(() =>
-    listener(),
-  );
-  return () => {
-    if (typeof unsubscribe === "function") unsubscribe();
-  };
+  const handler = () => listener();
+  window.addEventListener(SYNC_CHANGED_EVENT, handler);
+  return () => window.removeEventListener(SYNC_CHANGED_EVENT, handler);
 }

src/ui/plugin-host/sdk-ui.ts

@@ -133,6 +133,7 @@ export {
   hydrateLocalSharedHostAuth,
   resolveRemoteHostId,
 } from "@/lib/remote-server-api";
+export { remoteServerUrl as linkedServerUrl } from "@/plugin-host/desktop";
 export { useConnectionDefaults } from "@/contexts/ConnectionDefaultsContext";
 
 // Dashboard reads. The calls a plugin makes on the user's behalf (recent