feat(provider,adapter): Codex 默认 body_rules 按 provider_type 维度注册，adapter 全链路传递 provider_type

- 新增 register_provider_default_body_rules 注册机制，将 Codex 特有的
  body_rules 从 EndpointDefinition 全局默认移至 codex plugin 按
  (provider_type, endpoint_sig) 维度注册
- handler adapter 的 build_endpoint_url/build_request_body/get_cli_extra_headers
  增加 provider_type 参数，Codex 判断优先使用 provider_type 而非 URL 匹配
- 前端 getDefaultBodyRules API 支持 provider_type 参数，缓存 key 区分不同
  provider 类型；Codex 路径判断同样优先使用 provider_type
- ProviderDetailDrawer 将 mapping-preview 拆为独立加载，不阻塞首屏渲染
- PoolManagement 补全 KeyFormDialog 缺失的 endpoint/available-api-formats props
- 固定类型 Provider 创建时自动填充 provider-scoped 默认 body_rules

src/services/provider/adapters/codex/plugin.py

@@ -176,6 +176,24 @@ def register_all() -> None:
     # Behavior
     register_behavior_variant("codex", same_format=True, cross_format=True)
 
+    # Default Body Rules (Codex-specific, not format-wide)
+    from src.core.api_format.metadata import register_provider_default_body_rules
+
+    _codex_body_rules = (
+        {"action": "drop", "path": "max_output_tokens"},
+        {"action": "drop", "path": "temperature"},
+        {"action": "drop", "path": "top_p"},
+        {"action": "set", "path": "store", "value": False},
+        {
+            "action": "set",
+            "path": "instructions",
+            "value": "You are GPT-5.",
+            "condition": {"path": "instructions", "op": "not_exists"},
+        },
+    )
+    register_provider_default_body_rules("codex", "openai:cli", _codex_body_rules)
+    register_provider_default_body_rules("codex", "openai:compact", _codex_body_rules)
+
     # Export: Codex uses the default export builder (strip null + temp fields)
     # No need to register a custom one — the default in export.py suffices.