Fix: Handle image URLs in custom model responses

Improves the formatting of image URLs within responses from custom models.  This ensures that image URLs are correctly presented in the user interface.

src/utils/human-message.tsx

@@ -1,18 +1,16 @@
 import { isCustomModel } from "@/db/models"
 import { HumanMessage, type MessageContent } from "@langchain/core/messages"
 
-
 type HumanMessageType = {
-    content: MessageContent,
+  content: MessageContent
   model: string
 }
 
 export const humanMessageFormatter = ({ content, model }: HumanMessageType) => {
-    
   const isCustom = isCustomModel(model)
 
   if (isCustom) {
-        if(typeof content !== 'string') {
+    if (typeof content !== "string") {
       if (content.length > 1) {
         // this means that we need to reformat the image_url
         const newContent: MessageContent = [
@@ -33,11 +31,16 @@ export const humanMessageFormatter = ({ content, model }: HumanMessageType) => {
         return new HumanMessage({
           content: newContent
         })
+      } else {
+        return new HumanMessage({
+          //@ts-ignore
+          content: content[0].text
+        })
       }
     }
   }
 
   return new HumanMessage({
-        content,
+    content
   })
 }