Remove .env from tracking and ignore it

.env

@@ -1,3 +0,0 @@
-OPENAI_API_KEY=sk-e2f00b9fed01443b87407513ab14c494
-OPENAI_MODEL=deepseek-chat
-OPENAI_API_BASE=https://api.deepseek.com/v1  # (optional override if needed)

.gitignore

@@ -0,0 +1,87 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Virtual environment
+venv/
+ENV/
+env/
+.venv/
+.ENV/
+.env/
+
+# PyInstaller
+*.manifest
+*.spec
+
+# Unit test / coverage
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# MyPy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# IDEs
+.vscode/
+.idea/
+*.sublime-project
+*.sublime-workspace
+
+# Jupyter
+.ipynb_checkpoints
+
+# Logs
+*.log
+
+# Local .env or config
+.env
+.env.*
+
+# SQLite
+*.sqlite3
+
+# FastAPI docs build (if using Sphinx)
+_build/
+docs/_build/
+".env"