[Bug]: slug, seoTitle, and seoDescription are unreachable for Pages: locked in Data tab, no working editor UI

[gxvr]

Summary

The pages system table has built-in fields slug, seoTitle, and seoDescription. In Admin → Data these appear locked/disabled with the message "The '' field is managed by the editor and can't be edited here." implying each is editable through the Site editor instead.

• slug has no dedicated control - the only rename UI that exists updates title only and never passes a slug, so a page's slug is fixed at creation time and can never be changed afterward through any UI.

• seoTitle / seoDescription have no UI anywhere, and aren't wired into the domain model or the publisher.

Steps to reproduce

slug:

1. Open Admin → Site, create or select any regular (non-template) page.
2. Double-click the page in the Explorer panel to rename it — this is the only rename affordance available.
3. Type a new value and confirm. Note only the title changes; the page's URL/slug is untouched.
4. Look for any other control (context menu, settings panel, properties panel) that edits the slug directly. There is none for a regular page.
5. Go to Admin → Data → Pages, open the same row: slug is shown but disabled, with the "managed by the editor" message.

seoTitle / seoDescription:

1. Admin → Data → Pages → open any row.
2. seoTitle / seoDescription are shown but disabled, with the "managed by the editor" message.
3. Go to Admin → Site, select the same page, and look for any per-page SEO/metadata settings. There is none — nothing in the properties panel, canvas toolbar, or any dialog references SEO title/description for a page.

Expected behavior

• A user should be able to set/change a page's slug through some UI, either a dedicated field alongside the rename control, or a page-settings panel.
• A user should be able to set per-page seoTitle / seoDescription, and have those values actually affect the published page's <title> and <meta name="description"> tags.

Actual behavior

• slug: Permanently fixed after page creation and cannot be edited.

• seoTitle / seoDescription: Not read anywhere and cant edit it.

Version or commit

No response

Deployment mode

Local dev with Bun

Logs or screenshots