fix(mobile): improve mobile UI for kanban, group chat and page headers (#562)

- Fix kanban loading spinner flickering on auto-refresh (silent mode)
- Fix group chat room-list transparent background on mobile
- Fix group chat sidebar auto-opening on mobile entry
- Fix page-header title overlapped by hamburger button on mobile
- Move hamburger button position to top: 10px
- Add changelog note about upgrading hermes-agent for kanban support
- Add i18n translations for all 8 locales

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

packages/client/src/i18n/locales/zh.ts

@@ -913,6 +913,7 @@ export default {
     new_0_5_15_8: '修复 MarkdownRenderer 中下载链接重复包装问题',
     new_0_5_15_9: '修复 Hermes Markdown 媒体渲染与同步重试',
     new_0_5_15_10: '重构移除上游环境变量依赖',
+    new_0_5_15_11: '如果看板功能无法使用，请升级 hermes-agent',
     new_0_5_13_1: '新增消息队列，顺序处理运行请求，避免并发冲突',
     new_0_5_13_2: '支持二级 Skills 目录结构，扁平化 Skill 归入"杂项"分类',
     new_0_5_13_3: '启动同步时过滤临时会话（eph_*），避免导入内部会话',