diff --git a/app/adapters/web/metrics.py b/app/adapters/web/metrics.py
index d5af8b464..aa5b88114 100644
--- a/app/adapters/web/metrics.py
+++ b/app/adapters/web/metrics.py
@@ -3,9 +3,9 @@
 from __future__ import annotations
 
 import time
-from typing import Any
 
 from starlette.routing import Match
+from starlette.types import ASGIApp, Message, Receive, Scope, Send
 
 from app.runtime.observability import record_metric
 
@@ -13,11 +13,11 @@ from app.runtime.observability import record_metric
 class HttpMetricsMiddleware:
     """按路由模板、方法和状态码记录低基数 HTTP 时延。"""
 
-    def __init__(self, app: Any) -> None:
+    def __init__(self, app: ASGIApp) -> None:
         """保存下游 ASGI 应用。"""
         self._app = app
 
-    async def __call__(self, scope: dict, receive: Any, send: Any) -> None:
+    async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
         """只治理 HTTP scope，并在响应开始后读取路由模板。"""
         if scope.get("type") != "http":
             await self._app(scope, receive, send)
@@ -25,7 +25,7 @@ class HttpMetricsMiddleware:
         started_at = time.perf_counter()
         status = "500"
 
-        async def send_with_metrics(message: dict) -> None:
+        async def send_with_metrics(message: Message) -> None:
             """捕获响应状态并原样转发 ASGI 消息。"""
             nonlocal status
             if message.get("type") == "http.response.start":
@@ -44,16 +44,18 @@ class HttpMetricsMiddleware:
                 status=status,
             )
 
-    def _resolve_route_template(self, scope: dict) -> str:
+    def _resolve_route_template(self, scope: Scope) -> str:
         """遍历 ASGI wrapper 找到匹配路由模板，绝不回退到具体请求 path。"""
         route = scope.get("route")
-        if getattr(route, "path", None):
-            return route.path
-        candidate = self._app
+        if route is not None and getattr(route, "path", None):
+            route_path: str = route.path
+            return route_path
+        candidate: object | None = self._app
         while candidate is not None:
             for registered_route in getattr(candidate, "routes", ()):
                 match, _ = registered_route.matches(scope)
                 if match == Match.FULL:
-                    return getattr(registered_route, "path", "unmatched")
+                    matched_path: str = getattr(registered_route, "path", "unmatched")
+                    return matched_path
             candidate = getattr(candidate, "app", None)
         return "unmatched"
diff --git a/docs/code-quality.md b/docs/code-quality.md
index 3d125ea2b..f2f4feeaf 100644
--- a/docs/code-quality.md
+++ b/docs/code-quality.md
@@ -75,7 +75,7 @@ uv run --locked --no-sync python scripts/architecture/complexity.py
 回调和返回值类型；全仓错误计数为零并不保证单独纳入 strict frontier 后也为零。
 
 2026-10-16 开始逐文件清理类型债务，`app/domain/title.py` 通过局部可空类型声明保留
-既有搜索解析行为，并纳入严格清单；当前清单共 105 个文件（104 个生产文件和 1 个脚本）。
+既有搜索解析行为，并纳入严格清单；当前清单共 106 个文件（105 个生产文件和 1 个脚本）。
 每个治理提交聚焦一个生产文件及其必要测试、门禁配置、真实下降基线和指标文档。
 验收同时检查完整严格清单与全宿主 Linux 分析，避免 `follow_imports = skip` 隐藏依赖
 签名冲突；不通过忽略诊断或放宽类型合同接受回退。最新文件清单以 `mypy.ini` 为准，
diff --git a/docs/refactor/optimization-checklist.md b/docs/refactor/optimization-checklist.md
index 48165cd5e..273b52668 100644
--- a/docs/refactor/optimization-checklist.md
+++ b/docs/refactor/optimization-checklist.md
@@ -106,9 +106,9 @@ ARCH-201 至 ARCH-204 均达到实现、验证、提交、推送和远端门禁
 | Model/Oper 事务债务 | 0 | 自建 Session、自动事务装饰器、直接 commit/rollback 等基线均为零 |
 | Module Contract | 215 specs / 211 methods / 263 calls | 动态方法名为 0；分类事实富化通过显式合同进入插件调度，旧 YAML 分类方法已移除；download 新增 custom_words 可选参数，旧 provider 签名通过显式合同兼容 |
 | Event Contract | 53 | 均已有 payload model，但当前全部是 diagnostic enforcement |
-| Python 源码量 | 372,317 行 | 本次重新扫描物理行数，排除 `app/plugins/**`；74 个文件超过 1,000 行，12 个超过 2,000 行；源码尺寸仅作观察 |
+| Python 源码量 | 372,319 行 | 本次重新扫描物理行数，排除 `app/plugins/**`；74 个文件超过 1,000 行，12 个超过 2,000 行；源码尺寸仅作观察 |
 | 长方法 | 309 个超过 80 行 | 本次 AST 扫描排除 `app/plugins/**`；61 个超过 150 行，17 个超过 250 行；新增函数仍受 C901/嵌套深度门禁约束 |
-| 全量 mypy 历史债务 | 8,811 / 449 文件 | 通知排版补齐 Slack 消息块类型，历史债务减少 2 项；工作流资源过滤改用领域对象调用过滤链，恢复的节点输出在消费前归一化，并收紧可空资源列表的类型低水位；消息媒体交互类型债务已清零，canonical Facade 与 endpoint 类型边界已补齐，低水位只允许继续下降；微信 ClawBot 入站 item_list 媒体解析改为按子项键名分派后，类型错误减少 4 项；站点解析器分享率改用浮点初值，类型错误减少 20 项；本次下载与文件安全修复再减少 3 项；Transmission 进度回退值归一化再减少 2 项，逐文件逐错误码无增长 |
+| 全量 mypy 历史债务 | 8,806 / 448 文件 | 通知排版补齐 Slack 消息块类型，历史债务减少 2 项；工作流资源过滤改用领域对象调用过滤链，恢复的节点输出在消费前归一化，并收紧可空资源列表的类型低水位；消息媒体交互类型债务已清零，canonical Facade 与 endpoint 类型边界已补齐，低水位只允许继续下降；微信 ClawBot 入站 item_list 媒体解析改为按子项键名分派后，类型错误减少 4 项；站点解析器分享率改用浮点初值，类型错误减少 20 项；本次下载与文件安全修复再减少 3 项；Transmission 进度回退值归一化再减少 2 项，逐文件逐错误码无增长 |
 | Ruff 历史诊断 | 98 | 低水位门禁通过，但规则集只覆盖 `E4/E7/E9/F/I` |
 | 覆盖率固定基线 | Application 80.00%，Domain 80.00% | Chain、Runtime、Agent、Adapter、Startup 未进入包级覆盖率门禁 |
 
diff --git a/mypy.ini b/mypy.ini
index aa8261dbf..7241fa2aa 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -25,6 +25,7 @@ files =
     app/adapters/network/cloudflare.py,
     app/adapters/network/ip.py,
     app/adapters/web/correlation.py,
+    app/adapters/web/metrics.py,
     app/adapters/system/backup/database.py,
     app/adapters/system/fsworker.py,
     app/adapters/system/resource.py,
diff --git a/tests/fixtures/architecture/mypy-baseline.json b/tests/fixtures/architecture/mypy-baseline.json
index 0ce2c5796..5ec684e1d 100644
--- a/tests/fixtures/architecture/mypy-baseline.json
+++ b/tests/fixtures/architecture/mypy-baseline.json
@@ -89,11 +89,6 @@
   "app/adapters/system/stdio.py": {
     "override": 1
   },
-  "app/adapters/web/metrics.py": {
-    "no-any-return": 1,
-    "type-arg": 3,
-    "union-attr": 1
-  },
   "app/adapters/web/plugin/routes.py": {
     "type-arg": 1
   },