diff --git a/server.exe b/server.exe
deleted file mode 100644
index 7b2dc870..00000000
Binary files a/server.exe and /dev/null differ
diff --git a/启动项目.bat b/启动项目.bat
index 1bfa57ab..908cc320 100644
--- a/启动项目.bat
+++ b/启动项目.bat
@@ -3,9 +3,19 @@ title Warehouse Management System Launcher
 
 cd /d "%~dp0"
 
+echo Building backend...
+rem Rebuild on every launch so the executable can never be a stale one.
+go build -o server.exe ./cmd/server
+if errorlevel 1 (
+  echo.
+  echo Backend build failed. Fix the errors above and run this launcher again.
+  pause
+  exit /b 1
+)
+
 echo Starting backend (8082)...
-rem Run the current source so local testing never uses an outdated server.exe.
-start "Warehouse MMS - Backend" /D "%~dp0" cmd /k "go run ./cmd/server"
+rem Work dir must stay at the project root: frontend/dist and uploads are relative paths.
+start "Warehouse MMS - Backend" /D "%~dp0" cmd /k "server.exe"
 
 echo Starting frontend (8083)...
 start "Warehouse MMS - Frontend" /D "%~dp0frontend" cmd /k "npm run dev"