Update default category

src/streamlit_app.py

@@ -51,6 +51,7 @@ class LLMadapter(BaseAdapter):
         #assert model_name in model_list, f'{model_name} not found for provider: {provider}\nAvailable models:\n{model_list}' 
         self.adapter = LLMadapter.get_provider_class(provider)(model_name)
         self.system = system
+        
     def generate(self,  prompt, image):
         out = self.adapter.generate(prompt=prompt, image=image, system=self.system)
         return out
@@ -267,9 +268,18 @@ with st.sidebar:
 
     target_mode = st.selectbox("Target category mode", ["Pick specific", "Random each time"], index=0)
     if target_mode == "Pick specific":
+
+        DEFAULT_CAT = "bus"  # normalized label
+
+        if cats and DEFAULT_CAT in cats:
+            default_idx = cats.index(DEFAULT_CAT)
+        else:
+            default_idx = 0  # fallback
+
         target_category = st.selectbox(
             "Target category",
-            st.session_state.categories if st.session_state.categories else ["(load TSV first)"]
+            cats,
+            index=default_idx,
         )
         chosen_target = target_category if st.session_state.categories else None
     else: