diff --git a/app/db/decorators.py b/app/db/decorators.py
index 15305805c..95c7266a0 100644
--- a/app/db/decorators.py
+++ b/app/db/decorators.py
@@ -43,6 +43,14 @@ def run_legacy_sync_query(operation: Callable[[Session], _R]) -> _R:
         except Exception as close_err:  # noqa: BLE001 兼容查询释放失败不改变返回语义
             logger.error(f"释放数据库会话失败：{close_err}")
 
+
+async def run_legacy_async_query(
+    operation: Callable[[AsyncSession], Awaitable[_R]],
+) -> _R:
+    """为移除异步查询装饰器的旧 Model ABI 提供一次性异步会话。"""
+    async with async_session_scope() as db:
+        return await operation(db)
+
 def _get_args_db(
     args: tuple[Any, ...],
     kwargs: dict[str, Any],
diff --git a/app/db/models/siteicon.py b/app/db/models/siteicon.py
index e176ae7d5..3d420755b 100644
--- a/app/db/models/siteicon.py
+++ b/app/db/models/siteicon.py
@@ -4,7 +4,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import Mapped, Session, mapped_column
 
 from app.db.base import Base, get_id_column
-from app.db.decorators import db_query, async_db_query
+from app.db.decorators import run_legacy_async_query
 
 
 class SiteIcon(Base):
@@ -22,12 +22,25 @@ class SiteIcon(Base):
     base64: Mapped[Optional[str]] = mapped_column(String)
 
     @classmethod
-    @db_query
     def get_by_domain(cls, db: Session, domain: str):
+        """在调用方 Session 中查询站点图标。"""
         return db.execute(select(cls).where(cls.domain == domain)).scalars().first()
 
     @classmethod
-    @async_db_query
-    async def async_get_by_domain(cls, db: AsyncSession, domain: str):
-        result = await db.execute(select(cls).where(cls.domain == domain))
-        return result.scalar_one_or_none()
+    async def async_get_by_domain(
+        cls,
+        db: AsyncSession | None = None,
+        domain: str | None = None,
+    ):
+        """在调用方 AsyncSession 中查询站点图标。"""
+        if domain is None:
+            raise TypeError("domain is required")
+
+        async def query(session: AsyncSession):
+            """在给定异步会话中执行站点图标查询。"""
+            result = await session.execute(select(cls).where(cls.domain == domain))
+            return result.scalar_one_or_none()
+
+        if isinstance(db, AsyncSession):
+            return await query(db)
+        return await run_legacy_async_query(query)
diff --git a/app/db/models/sitestatistic.py b/app/db/models/sitestatistic.py
index 69b645ac8..7d7ddf061 100644
--- a/app/db/models/sitestatistic.py
+++ b/app/db/models/sitestatistic.py
@@ -6,7 +6,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import Mapped, Session, mapped_column
 
 from app.db.base import get_id_column, Base
-from app.db.decorators import db_query, async_db_query
+from app.db.decorators import run_legacy_async_query
 
 
 class SiteStatistic(Base):
@@ -30,15 +30,28 @@ class SiteStatistic(Base):
     note: Mapped[Optional[Any]] = mapped_column(JSON)
 
     @classmethod
-    @db_query
     def get_by_domain(cls, db: Session, domain: str):
+        """在调用方 Session 中查询站点统计。"""
         return db.execute(select(cls).where(cls.domain == domain)).scalars().first()
 
     @classmethod
-    @async_db_query
-    async def async_get_by_domain(cls, db: AsyncSession, domain: str):
-        result = await db.execute(select(cls).where(cls.domain == domain))
-        return result.scalar_one_or_none()
+    async def async_get_by_domain(
+        cls,
+        db: AsyncSession | None = None,
+        domain: str | None = None,
+    ):
+        """在调用方 AsyncSession 中查询站点统计，并兼容旧无会话调用。"""
+        if domain is None:
+            raise TypeError("domain is required")
+
+        async def query(session: AsyncSession):
+            """在给定异步会话中执行站点统计查询。"""
+            result = await session.execute(select(cls).where(cls.domain == domain))
+            return result.scalar_one_or_none()
+
+        if isinstance(db, AsyncSession):
+            return await query(db)
+        return await run_legacy_async_query(query)
 
     @classmethod
     def reset(cls, db: Session):
diff --git a/app/db/models/userconfig.py b/app/db/models/userconfig.py
index 01c5129de..47be8ed46 100644
--- a/app/db/models/userconfig.py
+++ b/app/db/models/userconfig.py
@@ -3,7 +3,6 @@ from sqlalchemy import String, UniqueConstraint, JSON, select
 from sqlalchemy.orm import Mapped, Session, mapped_column
 
 from app.db.base import get_id_column, Base
-from app.db.decorators import db_query
 
 
 class UserConfig(Base):
@@ -24,8 +23,8 @@ class UserConfig(Base):
     )
 
     @classmethod
-    @db_query
     def get_by_key(cls, db: Session, username: str, key: str):
+        """在调用方 Session 中查询用户配置。"""
         return db.execute(
             select(cls).where(cls.username == username, cls.key == key)
         ).scalars().first()
diff --git a/docs/refactor/backend-architecture-next-stage.md b/docs/refactor/backend-architecture-next-stage.md
index 32aa3637a..7e48238a3 100644
--- a/docs/refactor/backend-architecture-next-stage.md
+++ b/docs/refactor/backend-architecture-next-stage.md
@@ -1042,6 +1042,8 @@ runtime provider，旧插件或测试替换模块级 `settings` 时仍保持原
 无 Session ABI；用户查询与兼容专项 75 项测试、Pylint 及架构基线通过，查询装饰器由 119 个降至 117 个。
 随后将 Agent 系统设置查询/更新工具切换到已装配的 `RuntimeSettingsService` 窄端口，保留工具构造和
 设置更新返回 ABI；配置债务由 103 个文件降至 101 个文件，系统设置工具专项测试与架构基线通过。
+站点图标、站点统计和用户配置的只读 Model 方法随后改为显式 Session 执行，异步无 Session 旧 ABI 由
+一次性兼容查询会话承接；查询装饰器由 117 个降至 112 个，站点查询专项测试与架构基线通过。
 
 同日修正适配器配置下沉边界：OCR、CookieCloud、DoH、Rust 和资源签名等低层实现不再直接依赖
 `app.application`，由 `app.runtime.settings` 端口承接组合根注入；未启动装配时仍回退旧 Settings ABI，
diff --git a/tests/fixtures/architecture/dependency-baseline.json b/tests/fixtures/architecture/dependency-baseline.json
index 3da9f7f3a..7dbcad279 100644
--- a/tests/fixtures/architecture/dependency-baseline.json
+++ b/tests/fixtures/architecture/dependency-baseline.json
@@ -13,8 +13,8 @@
     "runtime_to_db": [],
     "workflow_to_db": []
   },
-  "edge_count": 6420,
-  "edge_sha256": "7c586d713c6014eb485763f8b7704d9421d95ba7d145910a33163dcb36882914",
+  "edge_count": 6419,
+  "edge_sha256": "bc2f57394915b9f90921a91cc4630a4426975ee765ece75a1aa0640080e41b4f",
   "edges": [
     "app -> app.runtime",
     "app -> app.runtime.compat",
@@ -3557,7 +3557,6 @@
     "app.db.models.user -> app.db.decorators",
     "app.db.models.userconfig -> app.db",
     "app.db.models.userconfig -> app.db.base",
-    "app.db.models.userconfig -> app.db.decorators",
     "app.db.models.workflow -> app.db",
     "app.db.models.workflow -> app.db.base",
     "app.db.models.workflow -> app.db.decorators",
diff --git a/tests/fixtures/architecture/transaction-debt-baseline.json b/tests/fixtures/architecture/transaction-debt-baseline.json
index b9636b031..23ecdb103 100644
--- a/tests/fixtures/architecture/transaction-debt-baseline.json
+++ b/tests/fixtures/architecture/transaction-debt-baseline.json
@@ -1,12 +1,12 @@
 {
   "model_decorators": {
     "by_kind": {
-      "async_db_query": 49,
+      "async_db_query": 47,
       "async_db_update": 0,
-      "db_query": 68,
+      "db_query": 65,
       "db_update": 0
     },
-    "count": 117,
+    "count": 112,
     "methods": [
       {
         "decorator": "async_db_query",
@@ -263,26 +263,6 @@
         "file": "app/db/models/site.py",
         "method": "Site.list_order_by_pri"
       },
-      {
-        "decorator": "async_db_query",
-        "file": "app/db/models/siteicon.py",
-        "method": "SiteIcon.async_get_by_domain"
-      },
-      {
-        "decorator": "db_query",
-        "file": "app/db/models/siteicon.py",
-        "method": "SiteIcon.get_by_domain"
-      },
-      {
-        "decorator": "async_db_query",
-        "file": "app/db/models/sitestatistic.py",
-        "method": "SiteStatistic.async_get_by_domain"
-      },
-      {
-        "decorator": "db_query",
-        "file": "app/db/models/sitestatistic.py",
-        "method": "SiteStatistic.get_by_domain"
-      },
       {
         "decorator": "async_db_query",
         "file": "app/db/models/siteuserdata.py",
@@ -548,11 +528,6 @@
         "file": "app/db/models/user.py",
         "method": "User.async_get_by_name"
       },
-      {
-        "decorator": "db_query",
-        "file": "app/db/models/userconfig.py",
-        "method": "UserConfig.get_by_key"
-      },
       {
         "decorator": "async_db_query",
         "file": "app/db/models/workflow.py",