feat: add ShareServer console prototype

ShareServer previously existed only as design documents. The repository now includes a standalone Hono service and a responsive React management-console prototype covering administrator and member workflows, with local build, test, and container entry points.

The sharing design now includes organization-scoped digital agents and explicit local partitioned-memory selection for @ calls. Memory documentation consistently uses partitioned memory and treats time or internal events only as optional recall triggers.

This remains an interactive prototype: fixture actions do not persist, and production authentication, PostgreSQL isolation, device connections, routing, relay, and federation still require implementation.

Release note: 新增可独立运行的 ShareServer 管理控制台交互原型，并完善组织数字人与分区记忆共享设计；当前原型数据和操作不会写入生产系统。

docs/features/continuous-learning/prd.md

@@ -11,8 +11,8 @@
 
 ## 1. 背景
 
-智能心跳可以生成摘要、后续任务和记忆候选，但这还不是完整学习。其长期“未来分区记忆”
-方向尚未设计，也不承担持续学习、模式挖掘或自动改进：
+智能心跳可以生成摘要、后续任务和记忆候选，但这还不是完整学习。它与分区记忆的协同尚未
+实施，也不承担持续学习、模式挖掘或自动改进：
 
 - 候选是否改善未来行为没有评估。
 - 一条反思是否会被检索和使用并不确定。