统一页面右上角操作区（05-31-unified-page-header-actions）

.trellis/tasks/05-31-unified-page-header-actions/implement.jsonl

@@ -0,0 +1,3 @@
+{"file": ".trellis/spec/hyb-oa/project-governance.md", "reason": "Trellis task、编码前方案和提交规则"}
+{"file": ".trellis/spec/hyb-oa/frontend-react-vite-design.md", "reason": "页面标题、业务列表、操作区和成熟企业后台设计规则"}
+{"file": ".trellis/spec/hyb-oa/docs-and-evidence.md", "reason": "记录视觉复检证据和避免敏感信息入库"}