Fix start.bat UTF-8 BOM and robust Python detection

start.bat

@@ -1,36 +1,48 @@
-@echo off
+@echo off
 chcp 65001 > nul
 title Tesseract Web GUI
 
-:: Путь к папке проекта
-set APP_DIR=%~dp0
-cd /d "%APP_DIR%"
+:: Path to project folder
+set "APP_DIR=%~dp0"
+cd /d "%APP_DIR%" || exit /b 1
 
-:: Проверяем Python
-where python > nul 2> nul
+:: Find Python
+for %%P in (python python3 py) do (
+    %%P --version >nul 2>nul
+    if not errorlevel 1 (
+        set "PYTHON=%%P"
+        goto :found_python
+    )
+)
+echo [ERROR] Python not found. Install Python 3.10+ and add it to PATH.
+pause
+exit /b 1
+
+:found_python
+echo [OK] Python: %PYTHON%
+
+:: Install deps
+echo [1/3] Installing dependencies...
+%PYTHON% -m pip install -q flask pillow pytesseract
 if errorlevel 1 (
-    echo [Ошибка] Python не найден. Установи Python 3.10+ и добавь в PATH.
+    echo [ERROR] Failed to install dependencies.
     pause
     exit /b 1
 )
 
-:: Установка зависимостей (пропустит если уже стоят)
-echo [1/3] Проверка зависимостей...
-python -m pip install -q flask pillow pytesseract
-
-:: Проверяем Tesseract
+:: Check Tesseract
 if not exist "C:\Program Files\Tesseract-OCR\tesseract.exe" (
-    echo [Предупреждение] Tesseract не найден по пути C:\Program Files\Tesseract-OCR\tesseract.exe
-    echo Установи: winget install UB-Mannheim.TesseractOCR
+    echo [WARNING] Tesseract not found at C:\Program Files\Tesseract-OCR\tesseract.exe
+    echo Install: winget install UB-Mannheim.TesseractOCR
     pause
     exit /b 1
 )
+echo [OK] Tesseract found
 
-:: Запуск
-echo [2/3] Запуск веб-сервиса...
-echo [3/3] Открой браузер: http://127.0.0.1:5000/
+:: Start
+echo [2/3] Starting web service...
+echo [3/3] Open browser: http://127.0.0.1:5000/
 echo.
-
-python app.py
+%PYTHON% app.py
 
 pause