feat: persist window width across hide/restore

[jensenojs]

Save user-adjusted window width ratio when hiding and restore it when restoring hidden windows.

Let situational width adjustments (wide tables, etc.) persist through toggle cycles while keeping config defaults for fresh sessions.

[jensenojs]

Sometimes the default width display may not be wide enough (for example, we find that opencode has just output a relatively wide table). In such cases, my instinctive action is to make temporary fine adjustments using a touchpad or similar device. During this temporary adjustment, I do not want the default settings to override it.

My local testing behavior is acceptable so far, but I've only conducted one round of vibe review, and I need to take a closer look myself.

But I have to go to sleep now. If you have time and no issues (or if you have any issues), feel free to make changes directly

[jensenojs]

before :

before.mp4

after :

after.mp4

[jensenojs]

Do I need to add test cases? @sudo-tee

[sudo-tee]

@jensenojs I would indeed like it if you have time to add tests for this :)

[sudo-tee]

Thanks for the fix
Works great :)