Perf: banners and room icons

[nushea]

Description

Add settings for rooms icons showing for every space with the default leaving it up to the general setting for icons showing, and the rest overriding it:

For the Room currently it will be present inside of the

It also adds styling to the RoomCard using the banner in preparation of maybe when it might happen that the associated MSC gets merged into the spec (as it stands it only works with rooms you are already a member of as it is stored as a regular state event)

And it also increases the size of the Vertical resizer bar as they are the ones that are possible to be seen on mobile and it helps with gripping them, and separated them into classes better so it might be more easily changeable with a tweak if so desired.

Lastly it fixes the banner buttons previously being enabled when the user is missing the permissions to edit the room banner

Fixes #

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings

AI disclosure:

• Partially AI assisted (clarify which code was AI assisted and briefly explain what it does).
• Fully AI generated (explain what all the generated code does in moderate detail).

Caine (the AI from TADC) gave me swappable parts and trapped me into a circus if that counts as assistance!

[github-actions]

Deploying with    Cloudflare Workers

Status	Preview URL	Commit	Alias	Updated (UTC)
✅ Deployment successful!	https://pr-851-sable.raspy-dream-bb1d.workers.dev	6c832a8	pr-851	Sat, 16 May 2026 10:32:11 GMT

[7w1]

lgtm