refactor(architecture): 修复模块依赖违规并强化架构守护

- 字幕编排上移 DownloadChain.download_site_subtitles，SubtitleModule 仅保留站点链接解析
- TransferChain.recommend_name 上移 TV episodes_info 获取，filemanager 模块不再导入 TmdbChain
- endpoint 穿透修复：WXBizMsgCrypt3 迁至 adapters/external/wechat_crypt.py；
  music/tmdb 缓存管理、listenbrainz 常量、TMDbException、WechatClawBot 辅助统一经 chain 包装
- RuleParser 与 builtin_rules 合并为 application/filter_rules.py；
  fsproxy/fsworker 迁至 adapters/system/
- chain/__init__.py 删除 qbittorrentapi/transmission_rpc 导入，消除后端协议类型泄漏
- 架构守护测试新增三项检查：模块间隔离、入口层穿透、下载器 SDK 泄漏
- 文档同步：05-architecture.md 记录 DB/Oper 聚合例外与迁移文件位置，AGENTS.md 更新所有权表

app/api/endpoints/notification.py

@@ -4,84 +4,12 @@ from fastapi import Depends
 
 from app import schemas
 from app.api.response import ResponseAPIRouter
-from app.runtime.extensions.module_manager import ModuleManager
+from app.chain.message import MessageChain
 from app.db.models import User
 from app.api.deps import get_current_active_superuser
-from app.modules.wechatclawbot.wechatclawbot import WechatClawBot
 
 router = ResponseAPIRouter()
 
-
-def _build_wechatclawbot_temp_client(
-    source: Optional[str] = None,
-    WECHATCLAWBOT_BASE_URL: Optional[str] = None,
-    WECHATCLAWBOT_DEFAULT_TARGET: Optional[str] = None,
-    WECHATCLAWBOT_ADMINS: Optional[str] = None,
-    WECHATCLAWBOT_POLL_TIMEOUT: Optional[int] = None,
-):
-    """基于当前表单配置创建一个临时客户端，用于未保存时的扫码状态预览。"""
-    source_name = str(source or "").strip()
-    if not source_name:
-        return None
-    return WechatClawBot(
-        name=source_name,
-        WECHATCLAWBOT_BASE_URL=WECHATCLAWBOT_BASE_URL,
-        WECHATCLAWBOT_DEFAULT_TARGET=WECHATCLAWBOT_DEFAULT_TARGET,
-        WECHATCLAWBOT_ADMINS=WECHATCLAWBOT_ADMINS,
-        WECHATCLAWBOT_POLL_TIMEOUT=WECHATCLAWBOT_POLL_TIMEOUT,
-        auto_start_polling=False,
-    )
-
-
-def _get_wechatclawbot_client(
-    source: Optional[str] = None,
-    fallback_source: Optional[str] = None,
-    WECHATCLAWBOT_BASE_URL: Optional[str] = None,
-    WECHATCLAWBOT_DEFAULT_TARGET: Optional[str] = None,
-    WECHATCLAWBOT_ADMINS: Optional[str] = None,
-    WECHATCLAWBOT_POLL_TIMEOUT: Optional[int] = None,
-    allow_temporary: bool = False,
-):
-    """获取已加载的微信 ClawBot 客户端，必要时退回到临时客户端。"""
-    module = ModuleManager().get_running_module("WechatClawBotModule")
-    source_name = str(source or "").strip() or None
-    fallback_name = str(fallback_source or "").strip() or None
-
-    if module:
-        candidate_names = []
-        for candidate in (fallback_name, source_name):
-            if candidate and candidate not in candidate_names:
-                candidate_names.append(candidate)
-
-        if candidate_names:
-            for candidate in candidate_names:
-                config = module.get_config(candidate)
-                if not config:
-                    continue
-                client = module.get_instance(config.name)
-                if client:
-                    return client, None
-        else:
-            client = module.get_instance()
-            if client:
-                return client, None
-
-    if allow_temporary:
-        temp_client = _build_wechatclawbot_temp_client(
-            source=source_name or fallback_name,
-            WECHATCLAWBOT_BASE_URL=WECHATCLAWBOT_BASE_URL,
-            WECHATCLAWBOT_DEFAULT_TARGET=WECHATCLAWBOT_DEFAULT_TARGET,
-            WECHATCLAWBOT_ADMINS=WECHATCLAWBOT_ADMINS,
-            WECHATCLAWBOT_POLL_TIMEOUT=WECHATCLAWBOT_POLL_TIMEOUT,
-        )
-        if temp_client:
-            return temp_client, None
-
-    if source_name:
-        return None, f"未找到名为 {source_name} 的微信 ClawBot 通知配置"
-    return None, "微信 ClawBot 通知未启用或配置尚未保存，请先保存并启用当前渠道"
-
-
 @router.get(
     "/wechatclawbot/status",
     summary="查询微信 ClawBot 登录状态",
@@ -99,7 +27,7 @@ def wechatclawbot_status(
     _: User = Depends(get_current_active_superuser),
 ):
     """查询微信 ClawBot 登录状态和二维码。"""
-    client, errmsg = _get_wechatclawbot_client(
+    client, errmsg = MessageChain.get_wechatclawbot_client(
         source=source,
         fallback_source=fallback_source,
         WECHATCLAWBOT_BASE_URL=WECHATCLAWBOT_BASE_URL,
@@ -134,7 +62,7 @@ def refresh_wechatclawbot_qrcode(
     _: User = Depends(get_current_active_superuser),
 ):
     """刷新微信 ClawBot 二维码。"""
-    client, errmsg = _get_wechatclawbot_client(
+    client, errmsg = MessageChain.get_wechatclawbot_client(
         source=source,
         fallback_source=fallback_source,
         WECHATCLAWBOT_BASE_URL=WECHATCLAWBOT_BASE_URL,
@@ -168,7 +96,7 @@ def logout_wechatclawbot(
     _: User = Depends(get_current_active_superuser),
 ):
     """退出微信 ClawBot 登录。"""
-    client, errmsg = _get_wechatclawbot_client(
+    client, errmsg = MessageChain.get_wechatclawbot_client(
         source=source,
         fallback_source=fallback_source,
         WECHATCLAWBOT_BASE_URL=WECHATCLAWBOT_BASE_URL,
@@ -202,7 +130,7 @@ def test_wechatclawbot(
     _: User = Depends(get_current_active_superuser),
 ):
     """测试微信 ClawBot 当前登录态是否可用。"""
-    client, errmsg = _get_wechatclawbot_client(
+    client, errmsg = MessageChain.get_wechatclawbot_client(
         source=source,
         fallback_source=fallback_source,
         WECHATCLAWBOT_BASE_URL=WECHATCLAWBOT_BASE_URL,
@@ -230,7 +158,7 @@ def migrate_wechatclawbot_cache(
     _: User = Depends(get_current_active_superuser),
 ):
     """在通知名称变更时迁移对应的微信 ClawBot 登录缓存。"""
-    success, message = WechatClawBot.migrate_cached_state(
+    success, message = MessageChain.migrate_wechatclawbot_cache(
         old_name=old_source,
         new_name=new_source,
         cleanup_old=cleanup_old,