Adding Russian translation

Adding a Russian translation and fixing other language files to make them look the same.

app/locales/cn.ts

@@ -67,7 +67,7 @@ const cn = {
       ConfirmClearAll: "确认清除所有数据？",
     },
     Lang: {
-      Name: "Language",
+      Name: "Language", // ATTENTION: if you wanna add a new translation, please do not translate this value, leave it as `Language`
       All: "所有语言",
       Options: {
         cn: "简体中文",
@@ -79,6 +79,7 @@ const cn = {
         jp: "日本語",
         de: "Deutsch",
         vi: "Vietnamese",
+        ru: "Русский",
       },
     },
     Avatar: "头像",