feat(fase-13): admin UI + sidebar entry + isServerAdmin store + e2e SA-01..04

13.3 admin UI:
  - (admin) route group with own layout + red banner + sidebar (Collectives,
    Admins, Audit log, Server). +layout.ts is client-rendered (ssr=false),
    same rationale as the (app) group.
  - /admin/collectives — paginated list via admin_list_collectives, search
    by name, soft-delete / restore / hard-delete modals (hard-delete needs
    explicit checkbox; force toggle bypasses the 30-day wait server-side).
  - /admin/collectives/[id] — members list with kick action; recent actions
    for the collective filtered from admin_actions.
  - /admin/admins — list via server_admins join to users (disambiguated by
    FK name — there are TWO FKs to users so the embed needs the explicit
    server_admins_user_id_fkey); promote modal does an email lookup; revoke
    button is replaced by "you (cannot revoke yourself while sole admin)"
    when applicable.
  - /admin/audit — paginated feed (default 50), action filter.
  - /admin/server — server-layer default-section toggles backed by
    admin_set_default_section + the new admin_clear_default_section RPC
    (added because patching the JSONB to `true` is NOT equivalent to "no
    opinion" — `true` explicitly overrides a collective OFF).

13.4 sidebar/drawer entry:
  - $isServerAdmin store (writable; +$isServerAdminLoaded for the gate
    race) refreshed on every onAuthStateChange in root layout, cleared on
    sign-out. Cached so the sidebar tile is synchronous.
  - DesktopSidebar + MobileDrawer render the entry only when the store is
    true. Distinct red icon so it never blends with normal nav.

Stores wiring:
  - features.ts gains serverSectionDefaults writable + enabledSections
    derived now reads server > collective > user > default. Loader
    piggybacks on loadCurrentUserFeatures so the server layer is fetched
    once per sign-in.
  - serverAdmin.ts new module — refreshServerAdminFlag() + clearServerAdminFlag().
  - Tracks isServerAdminLoaded so the (admin) layout doesn't redirect away
    during the millisecond between SIGNED_IN and the RPC resolving (caught
    empirically — every hard-load to /admin/* bounced to / without it).

13.5 tests:
  - admin.test.ts (SA-01..SA-04) with new loginAsAdmin fixture. Ana is the
    seed admin (server_admins seeded via supabase/seed.sql).
  - SA-04 + SV-02 reset their server-layer JSONB via the new
    admin_clear_default_section RPC so the suites don't leak state into
    each other.

Migration 025 adds admin_clear_default_section(text) — same SECURITY DEFINER
+ audit pattern as the rest. pgTAP 017 updated (23 plans, AR-T13b + the
SECURITY DEFINER list now includes the clear RPC).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

apps/web/messages/es.json

@@ -240,5 +240,64 @@
 	"section_label_lists": "Listas",
 	"section_label_tasks": "Tareas",
 	"section_label_notes": "Notas",
-	"section_label_search": "Buscar"
+	"section_label_search": "Buscar",
+	"admin_banner": "Modo admin — las acciones se registran",
+	"admin_nav_collectives": "Colectivos",
+	"admin_nav_admins": "Admins",
+	"admin_nav_audit": "Registro",
+	"admin_nav_server": "Servidor",
+	"admin_menu_entry": "Admin del servidor",
+	"admin_collectives_title": "Colectivos",
+	"admin_collectives_search_placeholder": "Buscar por nombre…",
+	"admin_collectives_empty": "Ningún colectivo coincide.",
+	"admin_collectives_col_name": "Nombre",
+	"admin_collectives_col_members": "Miembros",
+	"admin_collectives_col_created": "Creado",
+	"admin_collectives_col_status": "Estado",
+	"admin_collectives_status_active": "Activo",
+	"admin_collectives_status_deleted": "Borrado",
+	"admin_action_view": "Ver",
+	"admin_action_soft_delete": "Soft-delete",
+	"admin_action_restore": "Restaurar",
+	"admin_action_hard_delete": "Eliminar",
+	"admin_action_remove": "Expulsar",
+	"admin_modal_soft_delete_title": "Soft-delete colectivo",
+	"admin_modal_soft_delete_help": "El colectivo queda oculto para los miembros pero recuperable durante 30 días. Se registra el motivo.",
+	"admin_modal_reason_label": "Motivo",
+	"admin_modal_reason_placeholder": "¿Por qué?",
+	"admin_modal_hard_delete_title": "Eliminar colectivo",
+	"admin_modal_hard_delete_help": "Esto es irreversible. Se eliminarán todas las listas, ítems, tareas y notas.",
+	"admin_modal_hard_delete_confirm": "Entiendo que es irreversible",
+	"admin_modal_hard_delete_force_label": "Forzar (saltar espera de 30 días)",
+	"admin_modal_cancel": "Cancelar",
+	"admin_modal_confirm": "Confirmar",
+	"admin_collective_detail_back": "Volver a colectivos",
+	"admin_collective_detail_members": "Miembros",
+	"admin_collective_detail_recent_actions": "Acciones recientes",
+	"admin_modal_remove_member_title": "Expulsar miembro",
+	"admin_modal_remove_member_help": "La membresía se revoca al momento. Se registra el motivo.",
+	"admin_admins_title": "Admins del servidor",
+	"admin_admins_promote": "Promover usuario",
+	"admin_admins_promote_help": "Introduce el email del usuario a promover.",
+	"admin_admins_email_label": "Email",
+	"admin_admins_email_placeholder": "usuario@ejemplo.com",
+	"admin_admins_email_not_found": "No hay ningún usuario con ese email.",
+	"admin_admins_revoke_self": "tú (no puedes auto-revocarte si eres el único admin)",
+	"admin_admins_revoke": "Revocar",
+	"admin_audit_title": "Registro de acciones",
+	"admin_audit_empty": "Aún no hay acciones registradas.",
+	"admin_audit_col_when": "Cuándo",
+	"admin_audit_col_actor": "Actor",
+	"admin_audit_col_action": "Acción",
+	"admin_audit_col_target": "Objetivo",
+	"admin_audit_col_payload": "Payload",
+	"admin_server_title": "Configuración del servidor",
+	"admin_server_default_sections": "Visibilidad por defecto de secciones",
+	"admin_server_default_sections_help": "Override a nivel servidor. ON u OFF aquí prevalece sobre cualquier colectivo o usuario.",
+	"admin_server_section_state_off": "OFF",
+	"admin_server_section_state_on": "ON",
+	"admin_server_section_state_unset": "Sin opinión",
+	"admin_server_info": "Información del servidor",
+	"admin_error_forbidden": "No tienes acceso a esta zona.",
+	"admin_error_unknown": "Algo ha ido mal. Inténtalo de nuevo."
 }