feat(app):

- Adds true chat mode. Moves writing mode to local research mode.
- Adds model stats that shows model name and response time for messages.
- Adds settings toggle to allow turning off automatic suggestions

src/app/api/chat/route.ts

@@ -54,12 +54,18 @@ type Body = {
   systemInstructions: string;
 };
 
+type ModelStats = {
+  modelName: string;
+  responseTime?: number;
+};
+
 const handleEmitterEvents = async (
   stream: EventEmitter,
   writer: WritableStreamDefaultWriter,
   encoder: TextEncoder,
   aiMessageId: string,
   chatId: string,
+  startTime: number,
 ) => {
   let recievedMessage = '';
   let sources: any[] = [];
@@ -92,12 +98,32 @@ const handleEmitterEvents = async (
       sources = parsedData.data;
     }
   });
+  let modelStats: ModelStats = {
+    modelName: '',
+  };
+
+  stream.on('stats', (data) => {
+    const parsedData = JSON.parse(data);
+    if (parsedData.type === 'modelStats') {
+      modelStats = parsedData.data;
+    }
+  });
+
   stream.on('end', () => {
+    const endTime = Date.now();
+    const duration = endTime - startTime;
+    
+    modelStats = {
+      ...modelStats,
+      responseTime: duration,
+    };
+
     writer.write(
       encoder.encode(
         JSON.stringify({
           type: 'messageEnd',
           messageId: aiMessageId,
+          modelStats: modelStats,
         }) + '\n',
       ),
     );
@@ -109,10 +135,9 @@ const handleEmitterEvents = async (
         chatId: chatId,
         messageId: aiMessageId,
         role: 'assistant',
-        metadata: JSON.stringify({
-          createdAt: new Date(),
-          ...(sources && sources.length > 0 && { sources }),
-        }),
+        metadata: {
+          modelStats: modelStats,
+        },
       })
       .execute();
   });
@@ -185,6 +210,7 @@ const handleHistorySave = async (
 
 export const POST = async (req: Request) => {
   try {
+    const startTime = Date.now();
     const body = (await req.json()) as Body;
     const { message } = body;
 
@@ -293,7 +319,7 @@ export const POST = async (req: Request) => {
     const writer = responseStream.writable.getWriter();
     const encoder = new TextEncoder();
 
-    handleEmitterEvents(stream, writer, encoder, aiMessageId, message.chatId);
+    handleEmitterEvents(stream, writer, encoder, aiMessageId, message.chatId, startTime);
     handleHistorySave(message, humanMessageId, body.focusMode, body.files);
 
     return new Response(responseStream.readable, {