add title and description to ServeGradio (#15639)

* add title and description
* update test
* apply suggestions

Co-authored-by: Adrian Wälchli <[email protected]>

Author: aniketmaurya

src/lightning_app/components/serve/gradio.py

@@ -31,6 +31,8 @@ class ServeGradio(LightningWork, abc.ABC):
     outputs: Any
     examples: Optional[List] = None
     enable_queue: bool = False
+    title: Optional[str] = None
+    description: Optional[str] = None
 
     def __init__(self, *args, **kwargs):
         requires("gradio")(super().__init__(*args, **kwargs))
@@ -58,7 +60,14 @@ def run(self, *args, **kwargs):
             self._model = self.build_model()
         fn = partial(self.predict, *args, **kwargs)
         fn.__name__ = self.predict.__name__
-        gradio.Interface(fn=fn, inputs=self.inputs, outputs=self.outputs, examples=self.examples).launch(
+        gradio.Interface(
+            fn=fn,
+            inputs=self.inputs,
+            outputs=self.outputs,
+            examples=self.examples,
+            title=self.title,
+            description=self.description,
+        ).launch(
             server_name=self.host,
             server_port=self.port,
             enable_queue=self.enable_queue,

tests/tests_app/components/serve/test_gradio.py

@@ -27,4 +27,6 @@ def predict(self, *args, **kwargs):
     comp.run()
     assert comp.model == "model"
     assert comp.predict() == "prediction"
-    gradio_mock.Interface.assert_called_once_with(fn=ANY, inputs=ANY, outputs=ANY, examples=ANY)
+    gradio_mock.Interface.assert_called_once_with(
+        fn=ANY, inputs=ANY, outputs=ANY, examples=ANY, title=None, description=None
+    )