✨ feat(tokens-table): add selectable copy modes for bulk token copy action

This commit enhances the “Copy Selected Tokens to Clipboard” feature in `TokensTable.js` by introducing a user-friendly modal that lets users choose how they want to copy tokens.

Changes made
• Replaced direct copy logic with a `Modal.info` dialog.
• Modal displays the prompt “Please choose your copy mode”.
• Added two buttons in a custom footer:
  – **Name + Secret**: copies `tokenName    sk-tokenKey`.
  – **Secret Only**: copies `sk-tokenKey`.
• Each button triggers the copy operation and closes the dialog.
• Maintains existing validations (e.g., selection check, clipboard feedback).

Benefits
• Gives users clear control over copy format, reducing manual editing.
• Aligns UI with Semi UI’s best practices via custom modal footer.

No backend/API changes are involved; all updates are limited to the front-end UI logic.

web/src/i18n/locales/en.json

@@ -813,13 +813,16 @@
   "复制所选令牌": "Copy selected token",
   "请至少选择一个令牌！": "Please select at least one token!",
   "管理员未设置查询页链接": "The administrator has not set the query page link",
-  "复制所选令牌到剪贴板": "Copy selected token to clipboard",
   "批量删除令牌": "Batch delete token",
   "确定要删除所选的 {{count}} 个令牌吗？": "Are you sure you want to delete the selected {{count}} tokens?",
   "删除所选令牌": "Delete selected token",
   "请先选择要删除的令牌！": "Please select the token to be deleted!",
   "已删除 {{count}} 个令牌！": "Deleted {{count}} tokens!",
   "删除失败": "Delete failed",
+  "复制令牌": "Copy token",
+  "请选择你的复制方式": "Please select your copy method",
+  "名称+密钥": "Name + key",
+  "仅密钥": "Only key",
   "查看API地址": "View API address",
   "打开查询页": "Open query page",
   "时间(仅显示近3天)": "Time (only displays the last 3 days)",