feat(admin): host the ban/report settings page in the SPA schema

The users-interaction sidebar entry 禁封/举报 was a redirect stub; it is
now a schema-driven settings page replicating the reference theme
field-for-field:

- user_ban_s / user_report_s switches, ban_preset_reason and
  ban_appeal_keys as repeatable group rows ({t}), ban_appeal_desc and
  user_report_desc HTML textareas with the reference default copy, and
  user_report_img_s — keys, labels, help texts, defaults and ordering
  all mirrored in SchemaUsers.php and the SPA report.js schema
- UserRuntime::ban_settings()/report_settings() and
  BanAppeal::settings() read the new group-array values with fallback
  to the previous line/comma formats
- delete the self-built SPA queue pages (UsersBan, UsersReport,
  ReportDetailDrawer, UsersMessages) that the reference theme does not
  have; legacy /users/report bookmarks still redirect to the native page
- contract tests: lock the schema keys/labels, the schemaPage mount and
  the deleted-file state; drop reads of removed components

assets/admin/src/router/index.js

@@ -40,10 +40,6 @@ function createRouteMeta(page) {
     meta.section = page.section
   }
 
-  if (page.nativeAdminPath) {
-    meta.nativeAdminPath = page.nativeAdminPath
-  }
-
   if (page.component === 'DeferredPage') {
     meta.deferred = true
     meta.deferredProps = {