diff --git a/app/core/logging.py b/app/core/logging.py
index 56b856b..3e63ea5 100644
--- a/app/core/logging.py
+++ b/app/core/logging.py
@@ -87,5 +87,9 @@ def setup_logging(debug: bool = False) -> None:
     # 第三方库降噪
     logging.getLogger("httpx").setLevel(logging.WARNING)
     logging.getLogger("httpcore").setLevel(logging.WARNING)
+    # uvicorn --reload 的文件监视器: DEBUG 下会把每次"检测到变更"打出来。我们的 root 文件
+    # handler 又把这行写回 logs/app-server.log → watchfiles 再次检测 → 自我喂食死循环。
+    # 降到 WARNING 同时消除噪音和这个回环(真正的 .py 热重载不受影响)。
+    logging.getLogger("watchfiles").setLevel(logging.WARNING)
 
     _CONFIGURED = True
diff --git a/run.bat b/run.bat
index 1a83f75..379b096 100644
--- a/run.bat
+++ b/run.bat
@@ -17,6 +17,12 @@ REM avoids CRLF/encoding fights every time someone bash-runs the .sh on Win.
 
 cd /d "%~dp0"
 
+REM Prefer the project virtualenv (.venv) so we never inherit a wrong
+REM global/conda interpreter. FastAPI<0.115 on Pydantic 2.12 crashes at import
+REM with "'FieldInfo' object has no attribute 'in_'". Falls back to PATH python.
+set "PY=python"
+if exist "%~dp0.venv\Scripts\python.exe" set "PY=%~dp0.venv\Scripts\python.exe"
+
 if not exist .env (
     echo [X] Missing .env. Run: copy .env.example .env  and fill JWT_SECRET_KEY ^(plus MT_CPS_* if you test Meituan^)
     exit /b 1
@@ -25,11 +31,11 @@ if not exist .env (
 if not exist data mkdir data
 
 REM Build/upgrade SQLite schema (idempotent; no-op if already at head)
-call alembic upgrade head
+call "%PY%" -m alembic upgrade head
 if errorlevel 1 (
     echo [X] alembic upgrade head failed
     exit /b %errorlevel%
 )
 
 REM Long-running foreground process. Ctrl+C to stop.
-uvicorn app.main:app --host 0.0.0.0 --port 8770 --reload
+"%PY%" -m uvicorn app.main:app --host 0.0.0.0 --port 8770 --reload
diff --git a/run.sh b/run.sh
index bc00fe8..d7695e9 100755
--- a/run.sh
+++ b/run.sh
@@ -7,12 +7,20 @@
 set -e
 cd "$(dirname "$0")"
 
+# 优先用项目 venv 的解释器,避免误用全局/conda 里不兼容的 FastAPI/Pydantic
+# (FastAPI<0.115 撞 Pydantic 2.12 会在导入期崩 'FieldInfo' has no attribute 'in_')。
+PY=python
+[ -x .venv/bin/python ] && PY=.venv/bin/python
+[ -x .venv/Scripts/python.exe ] && PY=.venv/Scripts/python.exe
+
 if [ ! -f .env ]; then
   echo "❌ 缺 .env：先  cp .env.example .env  并填值（至少 JWT_SECRET_KEY；测美团再填 MT_CPS_*）"
   exit 1
 fi
 
 mkdir -p data            # sqlite 文件所在目录
-alembic upgrade head     # 确保表已建（幂等，已是最新则 no-op）
+"$PY" -m alembic upgrade head   # 确保表已建（幂等，已是最新则 no-op）
 
-exec uvicorn app.main:app --host 0.0.0.0 --port 8770 --reload
+# --reload 只盯源码目录 app/:别去监视 logs/(日志写入触发"检测→再写日志"回环)和
+# data/(sqlite 频繁写)。改 alembic/、.env、本脚本后请手动重启。
+exec "$PY" -m uvicorn app.main:app --host 0.0.0.0 --port 8770 --reload --reload-dir app