chore: Enable Japanese, update translation from Crowdin (#1417)

config/locales/zh_CN.yml

@@ -34,8 +34,14 @@ zh-CN:
         open: "对话被 %{user_name} 重新打开"
         auto_resolved: "Conversation was marked resolved by system due to %{duration} days of inactivity"
       assignee:
+        self_assigned: "%{user_name} self-assigned this conversation"
         assigned: "由 %{assignee_name} 分配给 %{user_name}"
         removed: "对话未被 %{user_name} 分配"
+      labels:
+        added: "%{user_name} added %{labels}"
+        removed: "%{user_name} removed %{labels}"
+      muted: "%{user_name} has muted the conversation"
+      unmuted: "%{user_name} has unmuted the conversation"
     templates:
       greeting_message_body: "%{account_name} 通常在几小时内回复。"
       ways_to_reach_you_message_body: "给团队一个联系您的方法。"