chore(config): 添加环境变量示例及.gitignore更新

- 新增 .env.example，包含 Tushare API、钉钉机器人和PostgreSQL数据库配置模板
- 更新.gitignore，忽略本地配置文件如 .env.local 和 config_local.py
- 添加对报表文件命名规则的支持，保留示例文件不忽略
- 删除废弃的 chart.py 及相关图表模块代码
- 新增 config/settings.py，实现从环境变量读取配置的统一接口
- 设置数据目录及缓存目录，确保目录存在，提高配置管理规范性

config/settings.py

@@ -0,0 +1,100 @@
+"""
+ETF策略项目 - 通用配置
+
+敏感信息通过环境变量读取，非敏感配置直接定义
+"""
+
+import os
+from pathlib import Path
+
+# 加载 .env 文件
+try:
+    from dotenv import load_dotenv
+    load_dotenv()
+except ImportError:
+    pass  # python-dotenv 未安装时跳过
+
+# 项目根目录
+PROJECT_ROOT = Path(__file__).parent.parent
+
+# 数据目录
+DATA_DIR = PROJECT_ROOT / "data"
+DATA_CACHE_DIR = PROJECT_ROOT / "data_cache"
+
+# 确保目录存在
+DATA_CACHE_DIR.mkdir(exist_ok=True)
+
+
+# ==================== API配置 ====================
+def get_tushare_token() -> str:
+    """从环境变量获取Tushare Token"""
+    token = os.getenv("TUSHARE_TOKEN")
+    if not token:
+        raise ValueError("请设置环境变量 TUSHARE_TOKEN")
+    return token
+
+
+# ==================== 钉钉配置 ====================
+def get_dingtalk_config() -> dict:
+    """从环境变量获取钉钉配置"""
+    return {
+        "webhook": os.getenv("DINGTALK_WEBHOOK", ""),
+        "secret": os.getenv("DINGTALK_SECRET", ""),
+    }
+
+
+# ==================== 数据库配置 ====================
+def get_db_config() -> dict:
+    """从环境变量获取数据库配置"""
+    return {
+        "host": os.getenv("DB_HOST", "192.168.0.115"),
+        "port": int(os.getenv("DB_PORT", "5432")),
+        "database": os.getenv("DB_NAME", "etf_db"),
+        "username": os.getenv("DB_USER", "admin"),
+        "password": os.getenv("DB_PASS", "admin"),
+    }
+
+
+# ==================== 代码映射 ====================
+CODE_NAME_MAP = {
+    # 宽基
+    "000300.SH": "沪深300",
+    "000905.SH": "中证500",
+    "000852.SH": "中证1000",
+    "399006.SZ": "创业板指",
+    "000015.SH": "上证红利",
+    # 金融
+    "399986.SZ": "中证银行",
+    "399975.SZ": "证券公司",
+    "000934.SH": "中证金融",
+    # 消费
+    "000932.SH": "中证消费",
+    "399997.SZ": "中证白酒",
+    # 医药
+    "000933.SH": "中证医药",
+    "399989.SZ": "中证医疗",
+    # 科技
+    "000935.SH": "中证信息",
+    "399971.SZ": "中证传媒",
+    # 新能源
+    "399808.SZ": "中证新能源",
+    "399976.SZ": "新能源车",
+    # 周期
+    "399395.SZ": "国证有色",
+    "399440.SZ": "中证钢铁",
+    "399998.SZ": "中证煤炭",
+    "399813.SZ": "细分化工",
+    "000937.SH": "中证能源",
+    "000938.SH": "中证材料",
+    # 其他
+    "399967.SZ": "中证军工",
+    "399393.SZ": "国证地产",
+    "000827.SH": "中证环保",
+    "399995.SZ": "中证基建",
+    "000949.SH": "中证农业",
+    "399702.SZ": "中证国债指数",
+}
+
+# 基准指数
+BENCHMARK_CODE = "000300.SH"
+BENCHMARK_NAME = "沪深300指数"