fix(i18n): localize consumer group create and CSV import flows

[yyqdbngt]

Summary

The consumer group page is being localized in slices (offset-reset done previously); this PR covers the create-group and CSV import flows.

Localized in instance/consumer.tsx:

• Toolbar and modal titles (创建 Group), the create confirmation dialog (确认创建 / 将创建消费组 "{name}" / confirm & cancel) and the success toast (消费组 {name} 创建成功).
• The create form: Group 名称 label/validation (required, name pattern, max-length with the limit interpolated), placeholder, 订阅模式 / 消费类型 radio groups (集群消费 / 广播消费), 最大重试次数, 订阅组类型 select (普通消息 / 顺序消息 / 延迟消息 / 事务消息) and the conditional 顺序类型 select (分区顺序 / 全局顺序) - reusing existing keys (consumer.name, consumer.subMode, consumer.subGroupType, consumer.maxRetry) where wording matches.
• The CSV import flow: no-instance guard toast, parse failure, row statuses (成功 / 失败 / 无效 / 待导入) and the import rows table (行号 / Group 名称 / 状态 / 说明), all result toasts (imported / partial failures / all-failed / invalid rows skipped), the modal title with or without filename, ok/cancel (重试失败项 / 开始导入 / 关闭) and the three notice states (CSV 无法导入, invalid rows, import plan) with their shared field note.
• 43 new consumer.* keys; zh byte-identical.

Why

Creating groups and bulk-importing from CSV are frequent operator tasks whose forms, validation and result feedback must follow the active language.

Testing

• tsc --noEmit passes
• eslint clean on the changed files
• vitest run ConsumerPage - 29/29 tests pass

[RockteMQ-AI]

LGTM — clean i18n localization. Translation keys are well-organized and component changes are focused.

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Automated review by github-manager-bot

[RockteMQ-AI]

LGTM — clean i18n localization.

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Automated review by github-manager-bot