feat(token): add batch API for fetching token keys

Add new endpoint POST /api/token/batch/keys to fetch multiple
token keys in a single request, improving performance when
exporting or copying multiple tokens.

- Backend: Add GetTokenKeysBatch controller and GetTokenKeysByIds model
- Backend: Add route with CriticalRateLimit and DisableCache middleware
- Frontend: Add fetchTokenKeysBatch helper function
- Frontend: Update useTokensData to use batch API for token export

i18n/keys.go

@@ -25,6 +25,7 @@ const (
 	MsgDeleteFailed      = "common.delete_failed"
 	MsgAlreadyExists     = "common.already_exists"
 	MsgNameCannotBeEmpty = "common.name_cannot_be_empty"
+	MsgBatchTooMany      = "common.batch_too_many"
 )
 
 // Token related messages

i18n/locales/en.yaml

@@ -21,6 +21,7 @@ common.delete_success: "Deletion successful"
 common.delete_failed: "Deletion failed"
 common.already_exists: "Already exists"
 common.name_cannot_be_empty: "Name cannot be empty"
+common.batch_too_many: "Too many items in batch request, maximum is {{.Max}}"
 
 # Token messages
 token.name_too_long: "Token name is too long"

i18n/locales/zh-CN.yaml

@@ -22,6 +22,7 @@ common.delete_success: "删除成功"
 common.delete_failed: "删除失败"
 common.already_exists: "已存在"
 common.name_cannot_be_empty: "名称不能为空"
+common.batch_too_many: "批量请求数量过多，最多 {{.Max}} 条"
 
 # Token messages
 token.name_too_long: "令牌名称过长"

i18n/locales/zh-TW.yaml

@@ -22,6 +22,7 @@ common.delete_success: "刪除成功"
 common.delete_failed: "刪除失敗"
 common.already_exists: "已存在"
 common.name_cannot_be_empty: "名稱不能為空"
+common.batch_too_many: "批次請求數量過多，最多 {{.Max}} 條"
 
 # Token messages
 token.name_too_long: "令牌名稱過長"