Initial REM planning editor

start-webserver.cmd

@@ -0,0 +1,27 @@
+@echo off
+setlocal
+
+set "APP_DIR=%~dp0"
+set "PORT=3000"
+set "APP_URL=http://127.0.0.1:3000/"
+
+powershell -NoProfile -ExecutionPolicy Bypass -Command ^
+  "$ErrorActionPreference = 'Stop';" ^
+  "$appDir = $env:APP_DIR;" ^
+  "$port = [int]$env:PORT;" ^
+  "$url = $env:APP_URL;" ^
+  "$listener = Get-NetTCPConnection -LocalPort $port -State Listen -ErrorAction SilentlyContinue;" ^
+  "if (-not $listener) {" ^
+  "  Start-Process -FilePath 'node' -ArgumentList 'server.mjs' -WorkingDirectory $appDir -WindowStyle Hidden;" ^
+  "  Start-Sleep -Milliseconds 900;" ^
+  "}" ^
+  "Start-Process $url;"
+
+if errorlevel 1 (
+  echo Fehler: Server konnte nicht gestartet oder Browser nicht geoeffnet werden.
+  echo Pruefe, ob Node.js installiert ist und Port %PORT% frei ist.
+  pause
+  exit /b 1
+)
+
+endlocal