feat(server): modularize backend and admin console

app/core/config.py

@@ -0,0 +1,34 @@
+from pathlib import Path
+import os
+
+from dotenv import load_dotenv
+
+
+BASE_DIR = Path(__file__).resolve().parents[2]
+ENV_FILE_PATH = Path(os.getenv("ENV_FILE_PATH", str(BASE_DIR / ".env"))).expanduser()
+if not ENV_FILE_PATH.is_absolute():
+    ENV_FILE_PATH = BASE_DIR / ENV_FILE_PATH
+
+load_dotenv(ENV_FILE_PATH)
+
+
+def env_bool(name: str, default: bool = False) -> bool:
+    value = os.getenv(name)
+    return default if value is None else value.strip().lower() in {"1", "true", "yes", "on"}
+
+
+def configured_path(name: str, default: str) -> Path:
+    path = Path(os.getenv(name, default)).expanduser()
+    return path if path.is_absolute() else BASE_DIR / path
+
+
+class Settings:
+    """Centralized settings facade used during the backend template migration."""
+
+    server_host = os.getenv("SERVER_HOST", "0.0.0.0")
+    server_port = int(os.getenv("SERVER_PORT", "8000"))
+    service_title = os.getenv("SERVICE_TITLE", "软件自动升级服务")
+    admin_token = os.getenv("ADMIN_TOKEN", "").strip()
+
+
+settings = Settings()