[webui] support ja (#6698)

* add support for japanese language

* add support for japanese language

---------

Co-authored-by: engchina <atjapan2015@gmail.com>
Former-commit-id: de9bc3fefa4fcb5db7d04589b16282a078c62cb2

src/llamafactory/webui/components/top.py

@@ -31,7 +31,7 @@ if TYPE_CHECKING:
 
 def create_top() -> Dict[str, "Component"]:
     with gr.Row():
-        lang = gr.Dropdown(choices=["en", "ru", "zh", "ko"], value=None, scale=1)
+        lang = gr.Dropdown(choices=["en", "ru", "zh", "ko", "ja"], value=None, scale=1)
         available_models = list(SUPPORTED_MODELS.keys()) + ["Custom"]
         model_name = gr.Dropdown(choices=available_models, value=None, scale=3)
         model_path = gr.Textbox(scale=3)

src/llamafactory/webui/interface.py

@@ -73,7 +73,7 @@ def create_web_demo() -> "gr.Blocks":
     engine = Engine(pure_chat=True)
 
     with gr.Blocks(title="Web Demo", css=CSS) as demo:
-        lang = gr.Dropdown(choices=["en", "ru", "zh", "ko"], scale=1)
+        lang = gr.Dropdown(choices=["en", "ru", "zh", "ko", "ja"], scale=1)
         engine.manager.add_elems("top", dict(lang=lang))
 
         _, _, chat_elems = create_chat_box(engine, visible=True)