fix: 迁移 Pydantic V2 配置方式

app/core/config.py

@@ -1,8 +1,10 @@
-from pydantic_settings import BaseSettings
+from pydantic_settings import BaseSettings, SettingsConfigDict
 from pathlib import Path
 
 
 class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_prefix="XCCLAW_")
+
     opencode_host: str = "127.0.0.1"
     opencode_port: int = 4096
     opencode_password: str = ""
@@ -12,8 +14,5 @@ class Settings(BaseSettings):
 
     data_dir: Path = Path.home() / "Documents" / "XCDesktop" / "xcclaw"
 
-    class Config:
-        env_prefix = "XCCLAW_"
-
 
 settings = Settings()