Feat add basic hiding rooms

[nushea]

Description

This feature adds basic hiding of rooms and spaces, useful for when taking screenshots of sable if you have private rooms or the like, or if you have unsupportive family members that you do not want to know about your appurtenance to a queer space.

It clears spaces and rooms in the sidebar and the mutual rooms, and is activated per room in each room's appearance settings, or by using Alt-Shift-H for easy access when needed

(before selecting it)

(look with it)

(it has a setting for toggling it and one for clearing the lists)

(before and after in a user card)

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
• I have made corresponding changes to the documentation
• 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).

Made with the laziness of me not wanting to clear my screenshots every time

[github-actions]

Deploying with    Cloudflare Workers

Status	Preview URL	Commit	Alias	Updated (UTC)
✅ Deployment successful!	https://pr-861-sable.raspy-dream-bb1d.workers.dev	f7cbce3	pr-861	Mon, 18 May 2026 12:34:14 GMT