feat(trial): assemble completed Agent workspace updates

shared/cloud-agents.ts

@@ -98,7 +98,15 @@ export interface CloudInterrupt {
 export interface CloudMessage {
   id: number; role: 'user' | 'assistant' | 'system'; content: string; request_id: string;
   run_id: string | null; created_at: string;
+  message_id?: string | null;
   reasoning_content?: string;
+  tool_calls?: CloudToolCall[];
+}
+export interface CloudToolCall {
+  id: string; name: string; args: unknown; status: string;
+  display_name?: string; display_description?: string;
+  tool_call_result?: { content: unknown } | null;
+  error_message?: string | null;
 }
 export interface CloudHistory {
   thread_id: string; messages: CloudMessage[]; run: CloudRun | null; next_offset: number | null;