desktop: multi-window support in electron (#17155)

packages/desktop-electron/src/preload/index.ts

@@ -28,6 +28,7 @@ const api: ElectronAPI = {
   storeKeys: (name) => ipcRenderer.invoke("store-keys", name),
   storeLength: (name) => ipcRenderer.invoke("store-length", name),
 
+  getWindowCount: () => ipcRenderer.invoke("get-window-count"),
   onSqliteMigrationProgress: (cb) => {
     const handler = (_: unknown, progress: SqliteMigrationProgress) => cb(progress)
     ipcRenderer.on("sqlite-migration-progress", handler)
@@ -62,6 +63,7 @@ const api: ElectronAPI = {
   runUpdater: (alertOnFail) => ipcRenderer.invoke("run-updater", alertOnFail),
   checkUpdate: () => ipcRenderer.invoke("check-update"),
   installUpdate: () => ipcRenderer.invoke("install-update"),
+  setBackgroundColor: (color: string) => ipcRenderer.invoke("set-background-color", color),
 }
 
 contextBridge.exposeInMainWorld("api", api)