chore: scaffold yunke-server

Create pyproject.toml (FastAPI + SQLAlchemy + Playwright + APScheduler +
Redis + cryptography stack), .env.example, app/__init__.py and a
pydantic-settings Settings singleton (get_settings), and a root
.gitignore covering Python, Node, env, IDE and the local media dir.

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,21 @@
+# Python
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.venv/
+*.egg-info/
+
+# Node
+node_modules/
+dist/
+
+# Env
+.env
+
+# IDE
+.vscode/
+.idea/
+
+# Local media storage
+media/

yunke-server/.env.example

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+YUNKE_BASE_URL=https://crm2.yunkecn.com
+YUNKE_USERNAME=
+YUNKE_PASSWORD=
+DB_URL=mysql+asyncmy://user:pass@localhost:3306/yunke
+REDIS_URL=redis://localhost:6379/0
+MEDIA_DIR=./media
+# Fernet key (e.g. from cryptography.fernet.Fernet.generate_key()) used to encrypt
+# stored credentials. Required for real runs; left blank for tests.
+ENCRYPTION_KEY=

yunke-server/app/config.py

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+from functools import lru_cache
+from pathlib import Path
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    """Application settings sourced from environment / .env file."""
+
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_file_encoding="utf-8",
+        extra="ignore",
+    )
+
+    yunke_base_url: str = "https://crm2.yunkecn.com"
+    yunke_username: str = ""
+    yunke_password: str = ""
+    db_url: str = "mysql+asyncmy://user:pass@localhost:3306/yunke"
+    redis_url: str = "redis://localhost:6379/0"
+    media_dir: Path = Path("./media")
+    # Fernet key for encrypting stored credentials. Required for real runs;
+    # empty default lets tests construct Settings without a key.
+    encryption_key: str = ""
+
+
+@lru_cache
+def get_settings() -> Settings:
+    """Return the process-wide Settings singleton."""
+    return Settings()

yunke-server/pyproject.toml

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+[project]
+name = "yunke-server"
+version = "0.1.0"
+description = "云客数据本地化系统 - Python backend"
+requires-python = ">=3.11"
+dependencies = [
+    "fastapi",
+    "uvicorn[standard]",
+    "sqlalchemy[asyncio]",
+    "asyncmy",
+    "alembic",
+    "redis",
+    "httpx",
+    "playwright",
+    "apscheduler",
+    "pydantic",
+    "pydantic-settings",
+    "cryptography",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest",
+    "pytest-asyncio",
+    "respx",
+    "ruff",
+]
+
+[build-system]
+requires = ["setuptools>=68"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools.packages.find]
+where = ["."]
+include = ["app*"]
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]
+
+[tool.ruff]
+line-length = 100
+target-version = "py311"