Bootstrap Python rewrite skeleton

app/config.py

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+from functools import lru_cache
+from pathlib import Path
+
+from pydantic import computed_field
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    app_name: str = "Home Automation Backend (Python)"
+    app_env: str = "development"
+    app_debug: bool = False
+    app_host: str = "0.0.0.0"
+    app_port: int = 8000
+
+    database_url: str = "sqlite:///./data/app.db"
+
+    ticktick_client_id: str = ""
+    ticktick_client_secret: str = ""
+    ticktick_redirect_uri: str = ""
+    ticktick_token: str = ""
+
+    home_assistant_base_url: str = ""
+    home_assistant_auth_token: str = ""
+    home_assistant_action_task_project_id: str = ""
+
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_file_encoding="utf-8",
+        case_sensitive=False,
+    )
+
+    @computed_field
+    @property
+    def is_development(self) -> bool:
+        return self.app_env.lower() == "development"
+
+    @computed_field
+    @property
+    def sqlite_path(self) -> Path | None:
+        prefix = "sqlite:///"
+        if not self.database_url.startswith(prefix):
+            return None
+        raw_path = self.database_url[len(prefix) :]
+        return Path(raw_path)
+
+
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()
+