Fix start.bat (ASCII-only, guaranteed window stays open) + add start.ps1

- start.bat: remove all Chinese characters (caused silent failure when
  Windows batch parser ran before chcp 65001 took effect); add :error
  label so window stays open with pause on any failure
- start.ps1: PowerShell alternative launcher with coloured output,
  works without worrying about cmd.exe encoding issues

Co-Authored-By: Claude Sonnet 4 <noreply@anthropic.com>

start.bat

@@ -1,99 +1,113 @@
 @echo off
-chcp 65001 >nul
+setlocal
-setlocal enabledelayedexpansion
 
 echo.
 echo ============================================================
-echo   Siemens RAGAS 评估控制台  启动脚本
+echo   Siemens RAGAS Console  -  Starting...
 echo ============================================================
 echo.
 
-:: ---- 切换到脚本所在目录（即 siemens_ragas/）-------------------
+:: Change to the directory where this script lives (siemens_ragas/)
 cd /d "%~dp0"
+echo Working directory: %CD%
+echo.
 
-:: ---- 检查 Python ---------------------------------------------------
+:: ----------------------------------------------------------------
+:: 1. Check Python
+:: ----------------------------------------------------------------
 python --version >nul 2>&1
 if errorlevel 1 (
-    echo [错误] 未找到 Python，请确认已安装 Python 3.12+ 并加入 PATH。
+    echo [ERROR] Python not found. Please install Python 3.12+ and add it to PATH.
-    pause
+    goto :error
-    exit /b 1
 )
-for /f "tokens=*" %%v in ('python --version 2^>^&1') do set PY_VER=%%v
+for /f "tokens=*" %%v in ('python --version 2^>^&1') do echo [OK] %%v
-echo [OK] %PY_VER%
 
-:: ---- 检查 FastAPI / uvicorn ---------------------------------------
+:: ----------------------------------------------------------------
+:: 2. Check FastAPI / uvicorn
+:: ----------------------------------------------------------------
 python -c "import fastapi, uvicorn" >nul 2>&1
 if errorlevel 1 (
-    echo [提示] 正在安装 FastAPI 和 uvicorn...
+    echo [INFO] Installing fastapi and uvicorn...
     pip install fastapi uvicorn --quiet
     if errorlevel 1 (
-        echo [错误] 安装依赖失败，请手动运行: pip install fastapi uvicorn
+        echo [ERROR] Failed to install fastapi/uvicorn.
-        pause
+        echo         Run manually: pip install fastapi uvicorn
-        exit /b 1
+        goto :error
     )
-    echo [OK] FastAPI / uvicorn 安装完成。
+    echo [OK] fastapi and uvicorn installed.
 ) else (
-    echo [OK] FastAPI / uvicorn 已就绪。
+    echo [OK] fastapi / uvicorn ready.
 )
 
-:: ---- 检查 ragas 版本 ----------------------------------------------
+:: ----------------------------------------------------------------
+:: 3. Check ragas version
+:: ----------------------------------------------------------------
 python -c "import ragas; assert ragas.__version__ == '0.4.3', ragas.__version__" >nul 2>&1
 if errorlevel 1 (
-    echo [提示] 正在安装 ragas==0.4.3（评估引擎依赖）...
+    echo [INFO] Installing ragas==0.4.3 ...
     pip install "ragas==0.4.3" --quiet
     if errorlevel 1 (
-        echo [警告] ragas 安装失败。
+        echo [WARN] ragas install failed. Dashboard still works; evaluation trigger will show an error.
-        echo         控制台仍可启动：报告看板可用，触发评估功能将显示错误。
-        echo.
     ) else (
-        echo [OK] ragas 0.4.3 安装完成。
+        echo [OK] ragas 0.4.3 installed.
     )
 ) else (
-    echo [OK] ragas 0.4.3 已就绪。
+    echo [OK] ragas 0.4.3 ready.
 )
 
-:: ---- 检查是否有示例数据，没有则自动生成 ---------------------------
+:: ----------------------------------------------------------------
-set SAMPLE_META=outputs\kba-knowledge-base-offline-baseline\2026-06-15T08-30-00+00-00\metadata.json
+:: 4. Seed demo data if no runs exist yet
-if not exist "%SAMPLE_META%" (
+:: ----------------------------------------------------------------
-    echo [提示] 未找到示例运行数据，正在生成...
+if not exist "outputs\kba-knowledge-base-offline-baseline" (
+    echo [INFO] No run data found. Generating demo data...
     python scripts\seed_sample_run.py
     if errorlevel 1 (
-        echo [警告] 示例数据生成失败，看板可能为空。继续启动...
+        echo [WARN] Demo data generation failed. Dashboard may be empty.
     ) else (
-        echo [OK] 示例数据已生成。
+        echo [OK] Demo data generated.
     )
 ) else (
-    echo [OK] 已有运行数据，跳过示例生成。
+    echo [OK] Run data found, skipping demo generation.
 )
 
-:: ---- 检查端口是否已占用 ------------------------------------------
+:: ----------------------------------------------------------------
+:: 5. Pick an available port
+:: ----------------------------------------------------------------
 set PORT=8800
-netstat -ano | findstr /r ":%PORT%[^0-9]" | findstr "LISTENING" >nul 2>&1
+netstat -ano 2>nul | findstr ":8800" | findstr "LISTENING" >nul 2>&1
 if not errorlevel 1 (
-    echo [警告] 端口 %PORT% 已被占用，尝试使用 8801...
+    echo [WARN] Port 8800 in use, trying 8801...
     set PORT=8801
-    netstat -ano | findstr /r ":8801[^0-9]" | findstr "LISTENING" >nul 2>&1
+    netstat -ano 2>nul | findstr ":8801" | findstr "LISTENING" >nul 2>&1
     if not errorlevel 1 (
-        echo [错误] 端口 8800 和 8801 均被占用，请手动指定端口：
+        echo [ERROR] Ports 8800 and 8801 are both in use.
-        echo         python webmain.py --port ^<端口号^>
+        echo         Run manually: python webmain.py --port 8802
-        pause
+        goto :error
-        exit /b 1
     )
 )
 
 echo.
 echo ============================================================
-echo   启动控制台：http://127.0.0.1:%PORT%
+echo   Console URL : http://127.0.0.1:%PORT%
-echo   按 Ctrl+C 停止服务
+echo   Press Ctrl+C to stop the server
 echo ============================================================
 echo.
 
-:: ---- 稍等 1 秒后在默认浏览器打开页面 ----------------------------
+:: Open browser after 2-second delay (non-blocking)
 start /b cmd /c "timeout /t 2 >nul && start http://127.0.0.1:%PORT%"
 
-:: ---- 启动 uvicorn -------------------------------------------------
+:: Launch uvicorn (blocking — window stays open while server runs)
 python webmain.py --host 127.0.0.1 --port %PORT%
 
 echo.
-echo 服务已停止。
+echo Server stopped.
 pause
+exit /b 0
+
+:error
+echo.
+echo ============================================================
+echo   Startup failed. See error above.
+echo ============================================================
+pause
+exit /b 1

start.ps1

@@ -0,0 +1,111 @@
+# start.ps1 — Siemens RAGAS Console launcher for Windows PowerShell
+# Usage: Right-click -> "Run with PowerShell", or: powershell -ExecutionPolicy Bypass -File start.ps1
+
+$ErrorActionPreference = "Stop"
+Set-Location $PSScriptRoot
+
+Write-Host ""
+Write-Host "============================================================" -ForegroundColor Cyan
+Write-Host "  Siemens RAGAS Console  -  Starting..." -ForegroundColor Cyan
+Write-Host "============================================================" -ForegroundColor Cyan
+Write-Host ""
+Write-Host "Working directory: $PSScriptRoot"
+Write-Host ""
+
+# ----------------------------------------------------------------
+# 1. Check Python
+# ----------------------------------------------------------------
+try {
+    $pyver = & python --version 2>&1
+    Write-Host "[OK] $pyver" -ForegroundColor Green
+} catch {
+    Write-Host "[ERROR] Python not found. Please install Python 3.12+ and add to PATH." -ForegroundColor Red
+    Read-Host "Press Enter to exit"
+    exit 1
+}
+
+# ----------------------------------------------------------------
+# 2. Check FastAPI / uvicorn
+# ----------------------------------------------------------------
+$check = & python -c "import fastapi, uvicorn" 2>&1
+if ($LASTEXITCODE -ne 0) {
+    Write-Host "[INFO] Installing fastapi and uvicorn..." -ForegroundColor Yellow
+    & pip install fastapi uvicorn --quiet
+    if ($LASTEXITCODE -ne 0) {
+        Write-Host "[ERROR] Failed to install fastapi/uvicorn. Run: pip install fastapi uvicorn" -ForegroundColor Red
+        Read-Host "Press Enter to exit"
+        exit 1
+    }
+    Write-Host "[OK] fastapi / uvicorn installed." -ForegroundColor Green
+} else {
+    Write-Host "[OK] fastapi / uvicorn ready." -ForegroundColor Green
+}
+
+# ----------------------------------------------------------------
+# 3. Check ragas version
+# ----------------------------------------------------------------
+$check = & python -c "import ragas; assert ragas.__version__ == '0.4.3', ragas.__version__" 2>&1
+if ($LASTEXITCODE -ne 0) {
+    Write-Host "[INFO] Installing ragas==0.4.3 (evaluation engine)..." -ForegroundColor Yellow
+    & pip install "ragas==0.4.3" --quiet
+    if ($LASTEXITCODE -ne 0) {
+        Write-Host "[WARN] ragas install failed. Dashboard works; evaluation trigger will show error." -ForegroundColor Yellow
+    } else {
+        Write-Host "[OK] ragas 0.4.3 installed." -ForegroundColor Green
+    }
+} else {
+    Write-Host "[OK] ragas 0.4.3 ready." -ForegroundColor Green
+}
+
+# ----------------------------------------------------------------
+# 4. Seed demo data if missing
+# ----------------------------------------------------------------
+if (-not (Test-Path "outputs\kba-knowledge-base-offline-baseline")) {
+    Write-Host "[INFO] No run data found. Generating demo data..." -ForegroundColor Yellow
+    & python scripts\seed_sample_run.py
+    if ($LASTEXITCODE -ne 0) {
+        Write-Host "[WARN] Demo data generation failed. Dashboard may be empty." -ForegroundColor Yellow
+    } else {
+        Write-Host "[OK] Demo data generated." -ForegroundColor Green
+    }
+} else {
+    Write-Host "[OK] Run data found, skipping demo generation." -ForegroundColor Green
+}
+
+# ----------------------------------------------------------------
+# 5. Pick an available port
+# ----------------------------------------------------------------
+$PORT = 8800
+$inUse = netstat -ano 2>$null | Select-String ":$PORT\s" | Select-String "LISTENING"
+if ($inUse) {
+    Write-Host "[WARN] Port $PORT in use, trying 8801..." -ForegroundColor Yellow
+    $PORT = 8801
+    $inUse = netstat -ano 2>$null | Select-String ":$PORT\s" | Select-String "LISTENING"
+    if ($inUse) {
+        Write-Host "[ERROR] Ports 8800 and 8801 are both in use." -ForegroundColor Red
+        Write-Host "        Run manually: python webmain.py --port 8802"
+        Read-Host "Press Enter to exit"
+        exit 1
+    }
+}
+
+Write-Host ""
+Write-Host "============================================================" -ForegroundColor Cyan
+Write-Host "  Console URL : http://127.0.0.1:$PORT" -ForegroundColor Green
+Write-Host "  Press Ctrl+C to stop the server" -ForegroundColor Cyan
+Write-Host "============================================================" -ForegroundColor Cyan
+Write-Host ""
+
+# Open browser after 2-second delay
+Start-Job -ScriptBlock {
+    param($port)
+    Start-Sleep 2
+    Start-Process "http://127.0.0.1:$port"
+} -ArgumentList $PORT | Out-Null
+
+# Launch uvicorn (blocking)
+& python webmain.py --host 127.0.0.1 --port $PORT
+
+Write-Host ""
+Write-Host "Server stopped."
+Read-Host "Press Enter to exit"