feat(chat): implement pull-to-refresh functionality and pagination for chat history

src/stores/chat/__tests__/chat-machine.test-utils.ts

@@ -131,6 +131,10 @@ export function createTestChatMachine(
 export function createLoadHistoryCallback(
   messages: UiMessage[],
   networkMessages: UiMessage[] = messages,
+  pagination: { total: number; limit: number } = {
+    total: networkMessages.length,
+    limit: 50,
+  },
 ) {
   return fromCallback<ChatEvent>(({ sendBack }) => {
     sendBack({
@@ -147,6 +151,8 @@ export function createLoadHistoryCallback(
         localOverwritten: true,
         localCount: messages.length,
         networkCount: networkMessages.length,
+        total: pagination.total,
+        limit: pagination.limit,
       },
     });
     return () => undefined;