feat(settings): 关于页新增官方网站链接（billowliu2.github.io/KimiSwitch）

src/i18n/en.ts

@@ -261,6 +261,7 @@ export const enTranslations: Record<TranslationKey, string> = {
   updateCheckFailed: "Update check failed",
   lastChecked: "Last checked",
   appDescription: "Windows desktop LLM provider config manager",
+  settingsWebsite: "Official website",
   referenceProject: "Reference project",
 
   // Validation errors

src/i18n/zh.ts

@@ -256,6 +256,7 @@ export const zhTranslations = {
   updateCheckFailed: "检查更新失败",
   lastChecked: "上次检查",
   appDescription: "Windows 桌面端 LLM 供应商配置管理器",
+  settingsWebsite: "官方网站",
   referenceProject: "引用项目",
 
   // Validation errors