fix(codex): correct config path reporting and folder opening; allow empty config.toml; unify API key field as OPENAI_API_KEY; front-end invoke uses app_type/app fallback for Tauri commands

src/types.ts

@@ -1,7 +1,7 @@
 export interface Provider {
   id: string;
   name: string;
-  settingsConfig: Record<string, any>; // 完整的 Claude Code settings.json 配置
+  settingsConfig: Record<string, any>; // 应用配置对象：Claude 为 settings.json；Codex 为 { auth, config }
   websiteUrl?: string;
 }