Add initial project

.gitignore

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+# Environment files
+.env
+.env.development
+.env.staging
+.env.production
+.env.local
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Virtual environments
+venv/
+ENV/
+env/
+.venv
+
+# Testing
+.pytest_cache/
+.coverage
+htmlcov/
+.tox/
+.nox/
+coverage.xml
+*.cover
+.hypothesis/
+
+# IDEs
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Database
+data/*.db
+data/*.db-shm
+data/*.db-wal
+*.sqlite
+*.sqlite3
+
+# Logs
+*.log
+logs/
+
+# Secrets
+backend/client_secret*.json
+backend/credentials.json
+*.pem
+*.key
+
+# Node modules (if frontend uses npm)
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Docker
+docker-compose.override.yml
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Temporary files
+*.tmp
+*.bak
+*.swp
+
+# Large data exports
+export-zepp/
+
+# Gradle build artifacts
+android-companion/.gradle/