feat: enhance theme management and image caching functionality

src/lib/constants.ts

@@ -103,6 +103,7 @@ export enum CONFIG_KEYS {
   AUTO_CHECK_UPDATE = 'autoCheckUpdate',
   AUTO_DOWNLOAD_UPDATE = 'autoDownloadUpdate',
   SELECTED_CHANNELS = 'selectedChannels',
+  IMAGE_CACHE = 'imageCache',
 }
 
 export enum MENU_IDS {

src/lib/types.ts

@@ -20,6 +20,8 @@ export interface IConfig {
   [CONFIG_KEYS.DEFAULT_MODEL]?: string | null;
   // 选中的渠道
   [CONFIG_KEYS.SELECTED_CHANNELS]: Array<{ id: string; channelName: string; channelUrl: string }>;
+  // 图片缓存
+  [CONFIG_KEYS.IMAGE_CACHE]: Array<[string, any]>;
 }
 
 export interface Provider {