add gitignore

build.bat

@@ -1,48 +1,20 @@
 @echo off
-rem ==========================================================================
-rem  build.bat - builds gitdesk into a single Windows executable: dist\gitdesk.exe
-rem
-rem  Needs Python 3.9+ installed. Double-click it or run it from this folder.
-rem  It makes its own throwaway environment in .build-venv, so it doesn't touch
-rem  your normal Python packages.
-rem ==========================================================================
+rem build.bat - builds dist\gitdesk.exe. Double-click it, or run it from a terminal.
+rem In PowerShell type   .\build.bat   (PowerShell won't run it without the .\ in front).
+rem Needs Python 3.9+. The real work is done by build.py; everything is logged to build.log.
 setlocal
 cd /d "%~dp0"
-
 set "PY="
 where py >nul 2>&1 && set "PY=py -3"
 if not defined PY where python >nul 2>&1 && set "PY=python"
 if not defined PY (
     echo Python 3 was not found. Install it from https://www.python.org/downloads/
-    goto :fail
+    echo and tick "Add python.exe to PATH" during setup.
+    pause
+    exit /b 1
 )
-
-echo [1/3] Creating the build environment - .build-venv ...
-if not exist ".build-venv\Scripts\python.exe" %PY% -m venv .build-venv
-if not exist ".build-venv\Scripts\python.exe" goto :fail
-set "VPY=.build-venv\Scripts\python.exe"
-
-echo [2/3] Installing PyInstaller and Textual...
-"%VPY%" -m pip install --quiet --upgrade pip
-"%VPY%" -m pip install --quiet pyinstaller -r requirements.txt
-if errorlevel 1 goto :fail
-
-echo [3/3] Building gitdesk.exe...
-rem Textual and Rich load some of their modules on demand, so bundle all of them.
-"%VPY%" -m PyInstaller --noconfirm --clean --onefile --name gitdesk ^
-    --collect-submodules textual --collect-data textual --collect-submodules rich ^
-    --specpath build --workpath build --distpath dist ^
-    gitdesk.py
-if errorlevel 1 goto :fail
-
+%PY% "%~dp0build.py" %*
+set "RC=%errorlevel%"
 echo.
-echo Done: %CD%\dist\gitdesk.exe
-echo Copy it anywhere - a folder on your PATH is handy - and run "gitdesk" inside a repo.
 pause
-exit /b 0
-
-:fail
-echo.
-echo Build failed - see the messages above.
-pause
-exit /b 1
+exit /b %RC%