feat(desktop): scope tabs to windows (#34669)

packages/desktop/src/main/ipc.ts

@@ -9,7 +9,13 @@ import type { FatalRendererError, ServerReadyData, TitlebarTheme } from "../prel
 import { runDesktopMenuAction } from "./desktop-menu-actions"
 import { assertAttachmentBudget, createPickedFileAuthorizations } from "./attachment-picker"
 import { getStore } from "./store"
-import { getPinchZoomEnabled, setPinchZoomEnabled, setTitlebar, updateTitlebar } from "./windows"
+import {
+  getPinchZoomEnabled,
+  getWindowID,
+  setPinchZoomEnabled,
+  setTitlebar,
+  updateTitlebar,
+} from "./windows"
 import type { UpdaterController } from "./updater-controller"
 import { createUpdaterSubscriptions } from "./updater-subscriptions"
 
@@ -190,6 +196,14 @@ export function registerIpcHandlers(deps: Deps) {
 
   ipcMain.handle("get-window-count", () => BrowserWindow.getAllWindows().length)
 
+  ipcMain.handle("get-window-id", (event: IpcMainInvokeEvent) => {
+    const win = BrowserWindow.fromWebContents(event.sender)
+    if (!win) throw new Error("Window not found")
+    const id = getWindowID(win)
+    if (!id) throw new Error("Window ID not found")
+    return id
+  })
+
   ipcMain.handle("get-window-focused", (event: IpcMainInvokeEvent) => {
     const win = BrowserWindow.fromWebContents(event.sender)
     return win?.isFocused() ?? false