Update app.py

app.py

@@ -12,6 +12,7 @@ from contextlib import asynccontextmanager
 from fastapi import FastAPI, HTTPException
 from fastapi.responses import StreamingResponse
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import FileResponse
 from pydantic import BaseModel
 from transformers import AutoTokenizer, AutoModelForCausalLM, TextIteratorStreamer
 from threading import Thread
@@ -19,12 +20,13 @@ import torch
 
 # Model configuration
 MODEL_NAME = "Nanbeige/Nanbeige4.1-3B"
-MAX_LENGTH = 8192
+MAX_LENGTH = 32768
 
 # Global model and tokenizer
 model = None
 tokenizer = None
 
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
 
 class Message(BaseModel):
     role: str
@@ -147,6 +149,12 @@ async def root():
     }
 
 
+@app.get("/index", response_class=FileResponse)
+async def serve_chat():
+    """Serve chat.html as index."""
+    return FileResponse(os.path.join(BASE_DIR, "index.html"))
+
+
 @app.get("/health")
 async def health():
     """Health check endpoint."""