build: 署名注入用单引号包裹，支持含空格的值

deploy/build.bat

@@ -35,7 +35,8 @@ REM 文件不存在时二进制里也是空的，源码永远不含真实署名
 set "INTERNAL_SIGNATURE="
 if exist "..\deploy\signature.local.txt" set /p INTERNAL_SIGNATURE=<"..\deploy\signature.local.txt"
 if defined INTERNAL_SIGNATURE (
-  go build -ldflags "-X git.yeij.top/AskaEth/Scoreboard/server/internal/version.InternalSignature=%INTERNAL_SIGNATURE%" -o ..\dist\scoreboard.exe . || exit /b 1
+  REM 单引号包裹整个 -X：署名里的空格不会被 ldflags 拆开（go 的 ldflags 解析器认单引号）
+  go build -ldflags "-X 'git.yeij.top/AskaEth/Scoreboard/server/internal/version.InternalSignature=%INTERNAL_SIGNATURE%'" -o ..\dist\scoreboard.exe . || exit /b 1
   echo   internal signature injected
 ) else (
   go build -o ..\dist\scoreboard.exe . || exit /b 1