feat(i18n): add zh_Hant and ja_JP translations to all adapter YAML files

- Add zh_Hant (Traditional Chinese) to all 17 adapter YAML metadata and config fields
- Add ja_JP translations to global adapters (Telegram, Discord, Slack, Lark, LINE)
- Fix buggy zh_Hant in line.yaml and slack.yaml (contained simplified Chinese)
- Add zh_Hant field to backend I18nString model
- Add adapter category grouping with locale-aware ordering
- Add webhook Cloud CTA for community edition users
- Fix wizard progress not clearing on skip/complete

src/langbot/pkg/platform/sources/wecom.yaml

@@ -5,19 +5,26 @@ metadata:
   label:
     en_US: WeCom
     zh_Hans: 企业微信
+    zh_Hant: 企業微信
   description:
     en_US: WeCom Adapter
     zh_Hans: 企业微信内部机器人，请查看文档了解使用方式
+    zh_Hant: 企業微信內部機器人，請查看文件了解使用方式
   icon: wecom.png
 spec:
+  categories:
+    - popular
+    - china
   config:
     - name: webhook_url
       label:
         en_US: Webhook Callback URL
         zh_Hans: Webhook 回调地址
+        zh_Hant: Webhook 回調地址
       description:
         en_US: Copy this URL and paste it into your WeCom app's webhook configuration
         zh_Hans: 复制此地址并粘贴到企业微信应用的 Webhook 配置中
+        zh_Hant: 複製此地址並貼到企業微信應用的 Webhook 設定中
       type: webhook-url
       required: false
       default: ""
@@ -25,6 +32,7 @@ spec:
       label:
         en_US: Corpid
         zh_Hans: 企业ID
+        zh_Hant: 企業ID
       type: string
       required: true
       default: ""
@@ -32,6 +40,7 @@ spec:
       label:
         en_US: Secret
         zh_Hans: 密钥 (Secret)
+        zh_Hant: 密鑰 (Secret)
       type: string
       required: true
       default: ""
@@ -39,6 +48,7 @@ spec:
       label:
         en_US: Token
         zh_Hans: 令牌 (Token)
+        zh_Hant: 令牌 (Token)
       type: string
       required: true
       default: ""
@@ -46,6 +56,7 @@ spec:
       label:
         en_US: EncodingAESKey
         zh_Hans: 消息加解密密钥 (EncodingAESKey)
+        zh_Hant: 訊息加解密密鑰 (EncodingAESKey)
       type: string
       required: true
       default: ""
@@ -53,9 +64,11 @@ spec:
       label:
         en_US: API Base URL
         zh_Hans: API 基础 URL
+        zh_Hant: API 基礎 URL
       description:
         en_US: API Base URL, used for accessing the WeCom API. If you are deploying in an internal network environment and accessing the WeCom Customer Service API through a reverse proxy, please fill in this item according to the documentation.
         zh_Hans: 可选，若您部署在内网环境并通过反向代理访问企业微信 API，可根据文档填写此项
+        zh_Hant: 可選，若您部署在內網環境並透過反向代理存取企業微信 API，可根據文件填寫此項
       type: string
       required: false
       default: "https://qyapi.weixin.qq.com/cgi-bin"