🤖 fix: send terminal IPC events to correct window

The TERMINAL_CREATE handler was hardcoded to send events to mainWindow,
but terminal windows are separate BrowserWindows that call terminal.create().
This caused terminal output to be sent to the main app window instead of
the terminal window, resulting in a blank/blinking cursor with no prompt.

Fix: Use BrowserWindow.fromWebContents(event.sender) to get the actual
window that made the IPC call, so events are routed correctly.

Generated with `mux`

Author: sreya

src/services/ipcMain.ts

@@ -1,5 +1,6 @@
 import assert from "@/utils/assert";
-import type { BrowserWindow, IpcMain as ElectronIpcMain } from "electron";
+import { BrowserWindow } from "electron";
+import type { IpcMain as ElectronIpcMain } from "electron";
 import { spawn, spawnSync } from "child_process";
 import * as fsPromises from "fs/promises";
 import * as path from "path";
@@ -1475,12 +1476,11 @@ export class IpcMain {
     );
   }
 
-  private registerTerminalHandlers(ipcMain: ElectronIpcMain, mainWindow: BrowserWindow): void {
+  private registerTerminalHandlers(ipcMain: ElectronIpcMain, _mainWindow: BrowserWindow): void {
     ipcMain.handle(IPC_CHANNELS.TERMINAL_CREATE, async (event, params: TerminalCreateParams) => {
       try {
         // Get the window that requested this terminal
-        // For now, all terminals use the main window (pop-out windows not yet implemented)
-        const senderWindow = mainWindow;
+        const senderWindow = BrowserWindow.fromWebContents(event.sender);
         if (!senderWindow) {
           throw new Error("Could not find sender window for terminal creation");
         }