Codex Desktop macOS: conversation title in header is unnecessarily truncated despite available space

What version of the Codex App are you using (From “About Codex” dialog)?

26.814.41407

What subscription do you have?

Plus

What platform is your computer?

macOS, Apple Silicon

What issue are you seeing?

The conversation title displayed in the header of Codex Desktop is unnecessarily truncated with an ellipsis even when there is substantial unused horizontal space available in the window.

For example, a conversation title is displayed as:

Summarize reposit...

while most of the header area to the right of the title remains empty.

This appears to be caused by the conversation-title element having a fixed or overly restrictive maximum width rather than using the available header space.

The title should be allowed to expand horizontally until it actually reaches another header control or the available window width.

What steps can reproduce the bug?

1. Open Codex Desktop on macOS.
2. Open a conversation with a title longer than approximately 15–20 characters.
3. Maximize or make the Codex window reasonably wide.
4. Look at the conversation title in the header.
5. Observe that the title is truncated with ... despite substantial unused space being available immediately to its right.

What is the expected behavior?

The conversation title should use the available horizontal space in the header.

It should only be truncated when displaying the complete title would conflict with another UI element or exceed the available window width.

For example, on a wide window:

Summarize repository structure

should be displayed in full if sufficient space is available.

Additional information

The attached screenshot demonstrates the issue clearly: the conversation title is ellipsized while a large amount of unused horizontal space remains to its right.

This appears to be a layout/width constraint on the conversation-title component rather than truncation caused by insufficient window space.

<img width="1720" height="106" alt="Image" src="https://github.com/user-attachments/assets/a5808502-334f-47a4-8b8a-6bc8d7b89210" />