Refactor change...

.gitignore

@@ -0,0 +1,40 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+env/
+venv/
+*.egg-info/
+dist/
+build/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Data files (generated at runtime)
+data/tournament_state.json
+data/tournament_results.json
+data/league_state.json
+data/players.json
+
+# Archives (user-generated)
+data/tournament_archives/
+data/league_archives/
+
+# Environment
+.env
+.env.local
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Temporary launcher scripts
+_run_server.py
+app_runner.py