Environment:

• OS: Windows 11 x64
• Codex Desktop Version: 26.406.3494.0
• Installation type: Standard Windows installer
• CLI: Codex CLI works нормально (no issues)

Summary:
There are two related issues in the Windows desktop app:

1. Closing the application via the window close button (X) does not terminate the app completely — multiple background processes remain running, preventing relaunch.
2. UI hit-testing is broken in the sidebar: hover and click behavior on the "New Chat" button is inconsistent and appears to pass through the element.

Issue 1: App does not exit when clicking "X"

Steps to reproduce:

1. Launch Codex desktop app
2. Click the window close button (X) in the top-right corner

Expected behavior:
Application fully terminates (all processes exit)

Actual behavior:

• The window closes
• ~5–6 Codex processes remain running in Task Manager
• Relaunching Codex fails (no window appears)

Workaround:

• Using File → Exit properly terminates all processes
• Alternatively, manually killing processes (taskkill /IM codex.exe /F) allows relaunch

Notes:
This suggests that the window close event does not trigger full application shutdown (app.quit() not called or not propagated).

Issue 2: Sidebar UI interaction bug ("New Chat")

Steps to reproduce:

1. Open Codex app
2. Move mouse over "New Chat" button in the sidebar

Expected behavior:

• Hover state activates
• Click triggers new chat

Actual behavior:

• Hover state does not activate consistently
• Click sometimes behaves as if it targets the window behind the UI
• Double-click behaves like interacting with the window title bar (not the button)

Additional observations:

• Behavior resembles broken hit-testing or incorrect input layer mapping
• Feels like pointer events are not correctly bound to the UI element

Regression

This behavior did not occur ~1 week ago.
The issue appeared after an update (current version: 26.406.3494.0).

Additional observations

• Issue 1 and Issue 2 may be related (renderer / event loop / Electron lifecycle inconsistency)
• Previous UI glitches (hover issues) were observed before the shutdown problem appeared
• Codex CLI works correctly → issue isolated to desktop runtime (Electron layer)

Impact

• Prevents normal app usage (cannot reliably restart app)
• Requires manual process cleanup
• UI interaction becomes unreliable

Suggested areas to investigate

• Handling of BrowserWindow close event
• app.on('window-all-closed') behavior on Windows
• Renderer hit-testing / pointer events
• GPU / compositing layer issues (optional: test with --disable-gpu)