add images and modify the main file

main.py

@@ -152,10 +152,17 @@ def plot(user_need:str,file:UploadFile=File(...)):
         if extension not in Supported_extensions:
             return JSONResponse(content={"error": "Unsupported file type"},status_code=400)
         file_bytes = file.read()
-        if len(file_bytes) >  MAX_SIZE :
-            return JSONResponse(content={"error": "too large file "},status_code=400)
-        df = pd.read_excel(io=io.BytesIO(file_bytes))
         
+        try:
+            
+            if len(file_bytes) >  MAX_SIZE :
+                return JSONResponse(content={"error": "too large file "},status_code=400)
+        except Exception as expEx:
+            print(expEx)
+            return JSONResponse(content={"error": "error in len "+str(expEx)},status_code=400)
+        
+        df = pd.read_excel(io=io.BytesIO(file_bytes))
+        print(df.head())
         message = f"""
 You are a helpful assistant that helps users write Python code.
 ## Requirements:

static/styles/index.css

@@ -203,6 +203,9 @@ nav {
   }
 }
 
+
+
+
 .about {
   padding: 100px 0;
   background-color: var(--dark-blue-light);
@@ -293,7 +296,6 @@ nav {
   display: flex;
   justify-content: center;
   align-items: flex-end;
-
 }
 
 .function-link:hover {