fix(opencode): distinguish remove and delete confirmation dialogs

Separate the confirmation dialogs for "remove from config" and "delete
provider" operations in OpenCode mode to help users understand the
different impacts of each action.

src/i18n/locales/en.json

@@ -157,7 +157,9 @@
   },
   "confirm": {
     "deleteProvider": "Delete Provider",
-    "deleteProviderMessage": "Are you sure you want to delete provider \"{{name}}\"? This action cannot be undone."
+    "deleteProviderMessage": "Are you sure you want to delete provider \"{{name}}\"? This action cannot be undone.",
+    "removeProvider": "Remove Provider",
+    "removeProviderMessage": "Are you sure you want to remove provider \"{{name}}\" from the configuration?\n\nAfter removal, this provider will no longer be active, but the configuration data will be retained in CC Switch. You can re-add it at any time."
   },
   "settings": {
     "title": "Settings",

src/i18n/locales/ja.json

@@ -157,7 +157,9 @@
   },
   "confirm": {
     "deleteProvider": "プロバイダーを削除",
-    "deleteProviderMessage": "プロバイダー「{{name}}」を削除してもよろしいですか？この操作は元に戻せません。"
+    "deleteProviderMessage": "プロバイダー「{{name}}」を削除してもよろしいですか？この操作は元に戻せません。",
+    "removeProvider": "プロバイダーを解除",
+    "removeProviderMessage": "プロバイダー「{{name}}」を設定から解除してもよろしいですか？\n\n解除後、このプロバイダーは無効になりますが、設定データは CC Switch に保持されます。いつでも再追加できます。"
   },
   "settings": {
     "title": "設定",

src/i18n/locales/zh.json

@@ -157,7 +157,9 @@
   },
   "confirm": {
     "deleteProvider": "删除供应商",
-    "deleteProviderMessage": "确定要删除供应商 \"{{name}}\" 吗？此操作无法撤销。"
+    "deleteProviderMessage": "确定要删除供应商 \"{{name}}\" 吗？此操作无法撤销。",
+    "removeProvider": "移除供应商",
+    "removeProviderMessage": "确定要从配置中移除供应商 \"{{name}}\" 吗？\n\n移除后该供应商将不再生效，但配置数据会保留在 CC Switch 中，您可以随时重新添加。"
   },
   "settings": {
     "title": "设置",