feat: complete mindspace conversation packages

src/utils/message.ts

@@ -119,7 +119,13 @@ export function normalizeUserMessageForApi(message: Message): Message {
 
 export function buildUserMessage(
   text: string,
-  options?: { agentText?: string; displayText?: string; imageUrls?: string[]; previewImageUrls?: string[] },
+  options?: {
+    id?: string;
+    agentText?: string;
+    displayText?: string;
+    imageUrls?: string[];
+    previewImageUrls?: string[];
+  },
 ): Message {
   const displayText = stripImageUrlLines(options?.displayText ?? text);
   const imageUrls = (options?.imageUrls ?? []).filter((value) => typeof value === 'string' && value.trim());
@@ -131,7 +137,7 @@ export function buildUserMessage(
   const agentText = [baseAgentText.trim(), imageText].filter(Boolean).join('\n\n');
 
   return {
-    id: crypto.randomUUID(),
+    id: options?.id ?? crypto.randomUUID(),
     role: 'user',
     created: Math.floor(Date.now() / 1000),
     content: agentText ? [{ type: 'text', text: agentText }] : [],