[Bug]: Use the full width when displaying tables

[Garfounkel]

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

apps/desktop

Steps to reproduce

Ask any model to display a table with long horizontal content. For example:

Reproduce exactly the following table in your next message:

| Job title | Company | Location | Posting date | Days posted | Reason |
| --- | --- | --- | --- | --- | --- |
| [Gameplay Programmer Senior Unity](https://emploi.afjv.com/emploi-jeux-video/EDEV1123-29067) | Old Skull Games | Villeurbanne, hybrid | 2026-09-07 | 2 | Lyon onsite/hybrid — relocation |
| [Game-ProgrammiererIn C#/Unity](https://www.workwithindies.com/careers/the-good-evil-game-programmiererin-c-unity-d-w-m) | the Good Evil | Cologne | 2026-09-03 | 6 | **German fluency** required |
| [Software Engineer, Game Development](https://join.com/companies/iterationonecom/15770392-software-engineer-game-development-f-m-d) | Iteration One | Karlsruhe, mostly onsite | Updated recently | ~3 (LI) | >1h from Mainz |

Expected behavior

Thread area should expand to use the full width available. Could be a toggle in settings.

Actual behavior

See following screenshot. Tables are rendered with a horizontal scroll bar because the entire width of the page isn't used. An option in settings to expand the horizontal width of the thread would be great.

Impact

Cosmetic issue

Version or commit

0.0.41-nightly.20260909.1439

Environment

Windows 0.0.41-nightly.20260909.1439

Logs or stack traces

Screenshots, recordings, or supporting files

No response

Workaround

No response

[juliusmarminge]

Duplicate of #10925 — same ask for an appearance/settings toggle to drop the max-w-3xl content lane so wide markdown tables can use the unused horizontal space instead of scrolling.

(Related prior: #8705 fixed the invisible-scrollbar side of wide tables via #8868; the full-width setting request lives in that discussion.)

[juliusmarminge]

Closing as duplicate of #10925.