Admin Dashboard §12+13: Support page + Account Settings (admin)

[oduwoleeyinojuoluwa44]

Two smaller spec pages bundled together.

§12 Support (admin/super-admin only)
Blocked on OQ-02: whether Support lives in this dashboard or a separate tool — build the structure now regardless; if the decision is "separate tool" this becomes a link/redirect instead.

• Support Tickets table: Ticket ID | Submitted By | Type | Subject | Status (Open/In Progress/Resolved) | Date Submitted | Assigned Admin
• Filters: status, type, date range; search by submitter name; pagination 20/page
• Detail panel on row click: full ticket thread, status controls, assignment (full scoping deferred until the location decision lands)

§13 Account Settings (all roles: Super Admin, Admin, Reviewer)
Read-only in MVP — no editable fields, no password/email change here (that's admin-only via §14 Admin Management).

• Display: name, email, role badge (Super Admin | Admin | Reviewer), logout button
• This likely just needs a GET /admin/me (or reuse existing user data already in the JWT/AuthUser) — no new mutation endpoints.

Gate Support with @Roles(UserRole.ADMIN) + @AdminTiers(AdminTier.SUPER_ADMIN, AdminTier.ADMIN). Account Settings has no tier restriction (all three tiers).