feat: Stream consumer groups UI

- stream.ts: streamGroups, streamConsumers, streamGroupCreate, streamGroupDestroy, streamAck
- IPC: redis:streamGroups, streamConsumers, streamGroupCreate, streamGroupDestroy, streamAck
- Preload bridge + types for all new methods
- StreamEditor.vue: collapsible consumer groups panel
  - XINFO GROUPS table with name/consumers/pending/last-delivered-id
  - Click group to expand XINFO CONSUMERS
  - Create group dialog (name, start ID, MKSTREAM)
  - Destroy group with confirm
- i18n keys (zh-CN + en)
- P1 complete!

ROADMAP.md

@@ -22,7 +22,7 @@
 - [x] **Redis 命令自动补全** — CLI 输入时智能提示（基于 commands.js 命令数据库）
 - [x] **CLI SUBSCRIBE/MONITOR** — 实时消息流 + MONITOR 命令流 + 停止按钮
 - [x] **CLI MULTI/EXEC** — 事务模式支持
-- [ ] **Stream 消费者组** — XINFO GROUPS / XINFO CONSUMERS 展开表格
+- [x] **Stream 消费者组** — XINFO GROUPS / XINFO CONSUMERS 展开表格
 
 ## P2 — 重要功能增强