完善客户端模块与工作区能力

shared/agent-session.ts

@@ -0,0 +1,15 @@
+export type AgentSessionMessageRole = 'user' | 'assistant';
+
+export type AgentSessionMessage = {
+  id?: string;
+  role: AgentSessionMessageRole;
+  created_at?: string;
+  text: string;
+};
+
+export type AgentSessionData = {
+  project_id: string;
+  session_id: string;
+  updated_at: string;
+  messages: AgentSessionMessage[];
+};