feat: add autostart scripts and fix port configuration in launchers

Windows: install-autostart.bat (Startup folder shortcut),
uninstall-autostart.bat. Linux: install-service.sh (systemd unit),
uninstall-service.sh.

Both launchers now use python -m wled_controller.main so port is
read from config/env instead of being hardcoded to 8080.

build-dist-windows.sh

@@ -243,6 +243,9 @@ cd /d "%~dp0"
 set PYTHONPATH=%~dp0app\src
 set WLED_CONFIG_PATH=%~dp0app\config\default_config.yaml
 
+:: Read port from env var or use default
+if "%WLED_SERVER__PORT%"=="" set WLED_SERVER__PORT=8080
+
 :: Create data directory if missing
 if not exist "%~dp0data" mkdir "%~dp0data"
 if not exist "%~dp0logs" mkdir "%~dp0logs"
@@ -250,13 +253,13 @@ if not exist "%~dp0logs" mkdir "%~dp0logs"
 echo.
 echo  =============================================
 echo   LedGrab v${VERSION_CLEAN}
-echo   Open http://localhost:8080 in your browser
+echo   Open http://localhost:%WLED_SERVER__PORT% in your browser
 echo  =============================================
 echo.
 
-:: Start the server (open browser after short delay)
-start "" /b cmd /c "timeout /t 2 /nobreak >nul && start http://localhost:8080"
-"%~dp0python\python.exe" -m uvicorn wled_controller.main:app --host 0.0.0.0 --port 8080
+:: Start the server — uses config from WLED_CONFIG_PATH, port from config or env
+start "" /b cmd /c "timeout /t 2 /nobreak >nul && start http://localhost:%WLED_SERVER__PORT%"
+"%~dp0python\python.exe" -m wled_controller.main
 
 pause
 LAUNCHER
@@ -264,6 +267,64 @@ LAUNCHER
 # Convert launcher to Windows line endings
 sed -i 's/$/\r/' "$DIST_DIR/LedGrab.bat"
 
+# ── Create autostart scripts ─────────────────────────────────
+
+cat > "$DIST_DIR/install-autostart.bat" << 'AUTOSTART'
+@echo off
+:: Install LedGrab to start automatically on Windows login
+:: Creates a shortcut in the Startup folder
+
+set SHORTCUT_NAME=LedGrab
+set STARTUP_DIR=%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup
+set TARGET=%~dp0LedGrab.bat
+set SHORTCUT=%STARTUP_DIR%\%SHORTCUT_NAME%.lnk
+
+echo Installing LedGrab autostart...
+
+:: Use PowerShell to create a proper shortcut
+powershell -NoProfile -Command ^
+  "$ws = New-Object -ComObject WScript.Shell; ^
+   $sc = $ws.CreateShortcut('%SHORTCUT%'); ^
+   $sc.TargetPath = '%TARGET%'; ^
+   $sc.WorkingDirectory = '%~dp0'; ^
+   $sc.WindowStyle = 7; ^
+   $sc.Description = 'LedGrab ambient lighting server'; ^
+   $sc.Save()"
+
+if exist "%SHORTCUT%" (
+    echo.
+    echo  [OK] LedGrab will start automatically on login.
+    echo  Shortcut: %SHORTCUT%
+    echo.
+    echo  To remove: run uninstall-autostart.bat
+) else (
+    echo.
+    echo  [ERROR] Failed to create shortcut.
+)
+
+pause
+AUTOSTART
+sed -i 's/$/\r/' "$DIST_DIR/install-autostart.bat"
+
+cat > "$DIST_DIR/uninstall-autostart.bat" << 'UNAUTOSTART'
+@echo off
+:: Remove LedGrab from Windows startup
+
+set SHORTCUT=%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\LedGrab.lnk
+
+if exist "%SHORTCUT%" (
+    del "%SHORTCUT%"
+    echo.
+    echo  [OK] LedGrab autostart removed.
+) else (
+    echo.
+    echo  LedGrab autostart was not installed.
+)
+
+pause
+UNAUTOSTART
+sed -i 's/$/\r/' "$DIST_DIR/uninstall-autostart.bat"
+
 # ── Create ZIP ───────────────────────────────────────────────
 
 ZIP_PATH="$BUILD_DIR/$ZIP_NAME"