feat: add automated setup scripts for Windows and Linux and update Windows entry point

scripts/setup.ps1

@@ -13,7 +13,6 @@ $distDir     = Join-Path $appDir   "dist"
 
 # ── Helpers ───────────────────────────────────────────────────────────────────
 function Print-Header {
-    Clear-Host
     Write-Host ""
     Write-Host "  ============================================================" -ForegroundColor Cyan
     Write-Host "   LOCAL AI IMAGE GENERATOR  -  First-Time Setup" -ForegroundColor Cyan

scripts/setup.sh

@@ -55,7 +55,6 @@ fi
 
 # ── Helpers ─────────────────────────────────────────────────────────────────
 print_header() {
-  clear 2>/dev/null || true
   echo ""
   echo "  ============================================================"
   echo "   LOCAL AI IMAGE GENERATOR  -  $PLATFORM_LABEL First-Time Setup"

windows.bat

@@ -67,7 +67,6 @@ goto :launch
 
 :: ── Launch ────────────────────────────────────────────────────────────────────
 :launch
-cls
 echo.
 echo  ============================================================
 echo   LOCAL AI IMAGE GENERATOR  ^|  Launching...
@@ -81,14 +80,8 @@ for /f "tokens=5" %%a in ('netstat -aon 2^>nul ^| findstr ":8080 "') do taskkill
 
 :: Start frontend server + backend manager (serve.cjs manages sd-vulkan.exe)
 echo  Starting Local AI Image Generator...
-start "SD-Server" /min "%NODE%" "%SERVE%"
-
-:: Wait for server to bind
-timeout /t 2 >nul
-
-:: Open browser
-echo  Opening browser at http://localhost:%FRONTEND_PORT%
-start http://localhost:%FRONTEND_PORT%
+echo  Opening browser at http://localhost:%FRONTEND_PORT%...
+start /b cmd /c "timeout /t 2 >nul && start http://localhost:%FRONTEND_PORT%"
 
 echo.
 echo  ============================================================
@@ -96,12 +89,8 @@ echo   Running!
 echo   Web UI:     http://localhost:%FRONTEND_PORT%
 echo   GPU API:    Auto-selected by the app (starts at 8080)
 echo.
-echo   Close this window to stop all services.
+echo   Press Ctrl+C in this window to stop all services.
 echo  ============================================================
 echo.
-pause >nul
 
-:: Cleanup on exit
-echo  Shutting down...
-taskkill /fi "WINDOWTITLE eq SD-Server*" /f >nul 2>nul
-echo  Done. Goodbye!
+"%NODE%" "%SERVE%"