fix: resolved the issue that the input text disappears while generating translation for the first run.

app.py

@@ -132,6 +132,11 @@ def get_translation_result():
     return input_text_content, output_text_content
 
 
+def set_input_text_content():
+    if 'input_text' in st.session_state:
+        st.session_state.translation_result['input'] = st.session_state.input_text
+
+
 def main():
     hold_deterministic(SEED)
     config = load_json(DATASETS_MODEL_INFO_PATH)
@@ -200,7 +205,14 @@ def main():
         disable = st.session_state.load_model_in_progress or st.session_state.translate_in_progress
         input_text_content, output_text_content = get_translation_result()
 
-        input_text = st.text_area("Enter Text", input_text_content, max_chars=MAX_INPUT_LEN, disabled=disable, key="input_text")
+        input_text = st.text_area(
+            "Enter Text",
+            input_text_content,
+            max_chars=MAX_INPUT_LEN,
+            disabled=disable,
+            key="input_text",
+            on_change=set_input_text_content,
+        )
 
         msg_model = "Please confirm model selection via the \'Select Model\' Button first!" \
                     if st.session_state.model_state['current_config'] is None \