fix(admin): replicate reference comment settings page 1:1

- Rewrite post_list/comment schema (PHP + JS) with the reference theme's
  field set, order, defaults and dependencies; smilie, comment location
  and quick-reply fields excluded
- Map PostDisplay::get_comment_display_settings() to the new keys without
  legacy fallback: close_comments, comment_paginate_type (ajax_lists),
  user_edit_comment master switch, WP comment_order for sorting
- Wire comment_box_hide visibility gate (signin / vip / vip_2 / auth)
- Drop dead comment settings (order/per_page/depth/avatar/hot threshold/
  empty text/city), the dead post_close_comments field, and city readers
  now fully owned by the IP-geo extension
- Add comment settings reference contract test

tools/admin-contract-report.json

@@ -1,5 +1,5 @@
 {
-    "generated_at": "2026-09-24T04:13:34+00:00",
+    "generated_at": "2026-09-24T05:35:38+00:00",
     "errors": [],
     "warnings": [
         "customPage tools-update section 'tools/update' not in PHP schema (ok if pure operational page)",
@@ -8,9 +8,6 @@
         "enum incomplete parse for 'avatar_external' (php subset of js): php=[] js=[,gravatar,weavatar,cravatar,geekzu,loli,sep,v2ex]",
         "enum incomplete parse for 'backup_frequency' (php subset of js): php=[daily] js=[daily,weekly,monthly]",
         "enum incomplete parse for 'bind_reminder' (php subset of js): php=[email] js=[email,phone,email_phone,close]",
-        "enum incomplete parse for 'comment_city_type' (php subset of js): php=[province_city] js=[province_city,province,country_province]",
-        "enum incomplete parse for 'comment_order' (php subset of js): php=[asc] js=[asc,desc]",
-        "enum incomplete parse for 'comment_pagination_type' (php subset of js): php=[numbered] js=[numbered,load_more,infinite]",
         "enum incomplete parse for 'content_audit_on_failure' (php subset of js): php=[allow] js=[allow,block]",
         "enum incomplete parse for 'content_audit_provider' (php subset of js): php=[baidu] js=[baidu,null]",
         "enum incomplete parse for 'epay_device' (php subset of js): php=[auto] js=[auto,pc,mobile]",
@@ -237,7 +234,7 @@
         "entry": true,
         "missing_chunks": [],
         "chunks": [
-            "SchemaPage.C2bnpARq.js",
+            "SchemaPage.CPZNRYWC.js",
             "vendor-vue.BYzo-2I-.js",
             "FaIcon.B3OOcphx.js",
             "FaIconPicker.DHrC0Y72.js",
@@ -252,8 +249,8 @@
             "vendor-draggable.YNevSrwY.js",
             "PageHeader.jmNZVzHG.js",
             "FooterTabbarSettings.CwSsjNlJ.js",
-            "PostPageSettings.DZzG8fRg.js",
-            "CommentSettings.sUF8U6J1.js",
+            "PostPageSettings.DxiP1RzY.js",
+            "CommentSettings.C6xJZ_dU.js",
             "PermissionsCapabilities.BeLUij9c.js",
             "CmsCredits.CTDJTkG-.js",
             "ThemeInfoPage.CbJKzVFa.js",