refactor: restructure to core/ + ui/ with multi-threaded backend

ui/models/config.py

@@ -0,0 +1,46 @@
+"""配置数据模型"""
+
+import json
+import os
+from dataclasses import dataclass, asdict
+from pathlib import Path
+from typing import Optional
+
+
+@dataclass
+class AppConfig:
+    """应用配置"""
+    api_key: str = ""
+    model: str = "deepseek-chat"
+    base_url: str = "https://api.deepseek.com"
+
+    @classmethod
+    def from_env(cls) -> "AppConfig":
+        """从环境变量加载配置"""
+        return cls(
+            api_key=os.getenv("DEEPSEEK_API_KEY", ""),
+            model=os.getenv("MODEL_NAME", "deepseek-chat"),
+            base_url=os.getenv("DEEPSEEK_BASE_URL", "https://api.deepseek.com"),
+        )
+
+    @classmethod
+    def from_file(cls, path: Path) -> "AppConfig":
+        """从文件加载配置"""
+        if not path.exists():
+            return cls()
+
+        with open(path, "r", encoding="utf-8") as f:
+            data = json.load(f)
+
+        return cls(
+            api_key=data.get("api_key", ""),
+            model=data.get("model", "deepseek-chat"),
+            base_url=data.get("base_url", "https://api.deepseek.com"),
+        )
+
+    def save(self, path: Path) -> None:
+        """保存配置到文件"""
+        path.parent.mkdir(parents=True, exist_ok=True)
+
+        with open(path, "w", encoding="utf-8") as f:
+            json.dump(asdict(self), f, indent=2, ensure_ascii=False)