[26.818] Chat input field hidden on startup, requires panel toggle to appear

Bug Report

• App: Codex Desktop (Windows)
• Version: 26.818.5229.0
• OS: Windows 11

Problem

After launching Codex Desktop, the chat input box does not appear. The user must manually open and close the bottom panel (via UI toggle) to trigger the input box to show up.

Steps to Reproduce

1. Launch Codex Desktop
2. Observe the main chat area — the input field is not visible
3. Toggle the bottom panel (open it, then close it)
4. The input box appears after the panel interaction

Expected Behavior

The chat input box should be visible immediately after launch, without any manual panel toggling.

Actual Behavior

Input box is hidden until a panel toggle action forces a layout re-render.

Notes

This is a regression introduced in version 26.818 — earlier versions did not have this issue. The problem appears to be that the input field DOM element remains in display: none state during app startup, and a layout reflow (triggered by the panel toggle) is needed to fix it.

Reproduce the startup sequence on Windows 11 using the issue's steps, then trace the desktop chat input and bottom-panel startup/layout entry points. The fix is complete when the input field is visible immediately after launch without toggling the panel, while the existing panel interaction continues to work.