feat: wire native Codex UI as /console entry, keep classic console at /console-classic

- Vendor codex-ui-stack host/ as cloud/codex-ui-host/ (original/ not vendored, 650MB)
- Bridge emulates 7 methods missing in codex 0.164.0-alpha.9, exposes 29
  experimental-protocol methods (150 -> 179), Linux binary candidates,
  read-only POST /__codex_git
- GET /console 302s to the UI host (:8095) when reachable, else falls back
  to the classic React console; GET /console-classic always serves it
- Alignment tables: docs/codex-native-ui-alignment.md
- Tests: test_console 7, new test_codex_ui_host 4, handler method pin 247 -> 249

cloud/tests/test_handler_split_conformance.py

@@ -148,7 +148,10 @@ class TestMethodAccounting(unittest.TestCase):
     # 增量全是 main 侧方法（_routing_shadow、_resolve_create_
     # agent_definition、_validate_create_audit_loop），源线方法
     # 零丢失、mixin 侧零增减；此为源线 34b9a34 同款 re-pin。
-    def test_total_247_no_duplicates(self):
+    # 补漏注：codex 原生 UI 接线新增 2 个 server.py 自有方法
+    # （_send_redirect、_serve_console_classic），总数 247 -> 249、
+    # server.py 自有 153 -> 155；mixin 侧零增减，源线方法零丢失。
+    def test_total_249_no_duplicates(self):
         seen = {}
         dups = []
         classes = [CloudControlPlaneHandler]
@@ -163,9 +166,9 @@ class TestMethodAccounting(unittest.TestCase):
                     dups.append((seen[name], cls.__name__, name))
                 seen[name] = cls.__name__
         self.assertEqual(dups, [])
-        self.assertEqual(total, 247)
+        self.assertEqual(total, 249)
         self.assertEqual(len(_own_methods(CloudControlPlaneHandler)),
-                         247 - 94)
+                         249 - 94)
 
 
 if __name__ == "__main__":