Admin: Privacy settings page

[tayebmokni]

Summary

Add a Privacy settings page in the admin at /admin/settings/privacy. Uses the JSON-Schema-driven <SchemaForm> against the privacy schema from the settings registry. Fields: privacy.policy_page_id (page picker), privacy.cookie_banner (boolean), plus retention defaults. This is a thin UI on top of the existing settings registry — a contained good-first-issue once the registry lands.

Design reference

• docs/05-admin-api.md §2.6 (Settings — Privacy page)

Acceptance criteria

• /admin/settings/privacy/page.tsx exists and renders <SchemaForm page="privacy">
• privacy.policy_page_id registered as a string schema with a page-picker UI widget
• privacy.cookie_banner boolean toggle
• Save bar shows pending state; success toast on save
• Validation errors surface inline against fields
• Capability gate: manage_options

Dependencies

Depends on Settings registry.

Complexity

XS

[tayebmokni]

Closing — shipped in the final-wave PR (#487-#492). Auto-close only fires for first ref.