fix: idempotent setup (skip env if exists), trim requirements.txt

setup.bat

@@ -1,6 +1,9 @@
 @echo off
 REM Photo Judgers — Conda Environment Setup (Windows)
 REM Run this from the project root: photo_judgers\setup.bat
+REM Idempotent: safe to re-run. Creates env if missing, installs deps.
+
+set ENV_NAME=photo_judgers
 
 echo ========================================
 echo  Photo Judgers — Setup
@@ -16,30 +19,45 @@ if %ERRORLEVEL% NEQ 0 (
     exit /b 1
 )
 
-echo Creating conda environment: photo_judgers
-echo Python version: 3.11
+echo Checking for environment: %ENV_NAME%
 echo.
 
-REM Create the conda environment
-conda create -y -n photo_judgers python=3.11
+REM Check if the environment already exists
+conda env list > "%TEMP%\conda_envs.txt" 2>nul
+set ENV_EXISTS=
+findstr /R /C "^%ENV_NAME%$" "%TEMP%\conda_envs.txt" >nul 2>nul
+if %ERRORLEVEL% EQU 0 set ENV_EXISTS=1
+del "%TEMP%\conda_envs.txt" 2>nul
 
-if %ERRORLEVEL% NEQ 0 (
-    echo ERROR: Failed to create conda environment.
-    pause
-    exit /b 1
+if defined ENV_EXISTS (
+    echo Environment '%ENV_NAME%' already exists. Skipping creation.
+) else (
+    echo Creating conda environment: %ENV_NAME%
+    echo Python version: 3.11
+    echo.
+    conda create -y -n %ENV_NAME% python=3.11
+    if %ERRORLEVEL% NEQ 0 (
+        echo ERROR: Failed to create conda environment.
+        pause
+        exit /b 1
+    )
 )
 
 echo.
 echo Activating environment...
-call conda activate photo_judgers
+call conda activate %ENV_NAME%
 
 echo.
-echo Installing packages...
+echo Installing packages from requirements.txt...
 echo.
-
-REM Install from requirements.txt
 pip install -r requirements.txt
 
+if %ERRORLEVEL% NEQ 0 (
+    echo.
+    echo WARNING: Package installation reported an error.
+    echo Check the messages above.
+)
+
 echo.
 echo ========================================
 echo  Setup complete!
@@ -51,4 +69,4 @@ echo.
 echo To run the scorer:
 echo   run.bat
 echo.
-pause
+pause