fix(i18n): clarify OpenClaw default model button labels

Rename "Enable/Default" to "Set Default/Current Default" across
zh/en/ja locales and widen button to fit longer text.

src/i18n/locales/en.json

@@ -91,8 +91,8 @@
     "addOpenCodeProvider": "Add OpenCode Provider",
     "addToConfig": "Add",
     "removeFromConfig": "Remove",
-    "setAsDefault": "Enable",
-    "isDefault": "Default",
+    "setAsDefault": "Set Default",
+    "isDefault": "Current Default",
     "inConfig": "Added",
     "addProviderHint": "Fill in the information to quickly switch providers in the list.",
     "editClaudeProvider": "Edit Claude Code Provider",

src/i18n/locales/ja.json

@@ -91,8 +91,8 @@
     "addOpenCodeProvider": "OpenCode プロバイダーを追加",
     "addToConfig": "追加",
     "removeFromConfig": "削除",
-    "setAsDefault": "有効化",
-    "isDefault": "デフォルト",
+    "setAsDefault": "デフォルトに設定",
+    "isDefault": "現在のデフォルト",
     "inConfig": "追加済み",
     "addProviderHint": "一覧にすばやく切り替えられるよう、ここに情報を入力してください。",
     "editClaudeProvider": "Claude Code プロバイダーを編集",

src/i18n/locales/zh.json

@@ -91,8 +91,8 @@
     "addOpenCodeProvider": "添加 OpenCode 供应商",
     "addToConfig": "添加",
     "removeFromConfig": "移除",
-    "setAsDefault": "启用",
-    "isDefault": "默认",
+    "setAsDefault": "设为默认",
+    "isDefault": "当前默认",
     "inConfig": "已添加",
     "addProviderHint": "填写信息后即可在列表中快速切换供应商。",
     "editClaudeProvider": "编辑 Claude Code 供应商",