feat(app): handle edge cases in greet()

app.py

@@ -8,6 +8,11 @@ def greet(name: str) -> str:
     Returns:
         str: A greeting message addressed to the specified user.
     """
+    if not name:
+        return "Hello stranger!!"
+    name = name.strip()
+    if len(name) > 50:
+        return "Name is too long!"
     return "Hello " + name + "!!"
 
 demo = gr.Interface(fn=greet, inputs="text", outputs="text")