fix: harden Windows startup and rebuild release

start.bat

@@ -1,20 +1,64 @@
 @echo off
+setlocal
 chcp 65001 >nul 2>&1
 cd /d "%~dp0"
+if errorlevel 1 (
+    echo [ERROR] Failed to open the CC-Web directory.
+    pause
+    exit /b 1
+)
 
-where node >nul 2>&1
-if %errorlevel% neq 0 (
-    echo [ERROR] Node.js not found. Please install Node.js first.
+where node.exe >nul 2>&1
+if errorlevel 1 (
+    echo [ERROR] Node.js was not found. Install Node.js 18 or later first.
     echo https://nodejs.org/
     pause
     exit /b 1
 )
 
-if not exist node_modules (
+node.exe -e "process.exit(Number(process.versions.node.split('.')[0]) >= 18 ? 0 : 1)"
+if errorlevel 1 (
+    echo [ERROR] Node.js 18 or later is required. Current version:
+    node.exe --version
+    pause
+    exit /b 1
+)
+
+where npm.cmd >nul 2>&1
+if errorlevel 1 (
+    echo [ERROR] npm was not found. Reinstall Node.js with npm enabled.
+    echo https://nodejs.org/
+    pause
+    exit /b 1
+)
+
+call npm.cmd ls --depth=0 >nul 2>&1
+if errorlevel 1 (
     echo Installing dependencies...
-    npm install
+    call :install_dependencies
+    if errorlevel 1 (
+        echo [ERROR] Failed to install dependencies. Check the npm output above.
+        pause
+        exit /b 1
+    )
 )
 
 echo Starting CC-Web...
-node server.js
+node.exe server.js
+set "APP_EXIT_CODE=%ERRORLEVEL%"
+
+if not "%APP_EXIT_CODE%"=="0" (
+    echo [ERROR] CC-Web stopped with exit code %APP_EXIT_CODE%.
+)
+
 pause
+exit /b %APP_EXIT_CODE%
+
+:install_dependencies
+if exist "package-lock.json" (
+    call npm.cmd ci
+) else (
+    call npm.cmd install
+)
+set "INSTALL_EXIT_CODE=%ERRORLEVEL%"
+exit /b %INSTALL_EXIT_CODE%