fix(chat): normalize message date headers

src/stores/chat/chat-machine.ts

@@ -38,7 +38,7 @@
 import { setup, assign } from "xstate";
 
 import { ChatStorage } from "@/data/storage/chat/chat_storage";
-import { formatDate, todayString, Logger } from "@/utils";
+import { todayString, Logger } from "@/utils";
 
 import { ChatState, initialState } from "./chat-state";
 import type { ChatEvent } from "./chat-events";
@@ -229,7 +229,7 @@ export const chatMachine = setup({
         messages.push({
           content: event.text,
           isFromAI: true,
-          date: formatDate(),
+          date: todayString(),
         });
       } else {
         const last = messages[messages.length - 1];
@@ -255,7 +255,7 @@ export const chatMachine = setup({
         {
           content: "Something went wrong. Try sending again?",
           isFromAI: true,
-          date: formatDate(),
+          date: todayString(),
         },
       ];
       return { messages, isReplyingAI: false };