Update app.py

app.py

@@ -61,17 +61,15 @@ if "pending_prompt" not in st.session_state:
 # ------------------ Tabs ------------------
 tab1, tab2 = st.tabs(["💬 Chat Assistant", "🖼️ Visual Reference Search"])
 
-# ------------------ Tab 1: Chat Assistant ------------------
+# ------------------ Tab 1 ------------------
 with tab1:
-    st.markdown("## 💬 Ask a Pathology-Specific Question")
-    col1, col2 = st.columns([2, 1])
-
-    with col2:
-        st.markdown("### 🔧 Tools")
+    with st.sidebar:
+        st.header("🔧 Tools")
         if st.button("🧹 Clear Chat"):
             st.session_state.messages = []
             st.session_state.thread_id = None
-            st.session_state.image_urls = []
+            st.session_state.image_url = None
+            st.session_state.image_updated = False
             st.session_state.pending_prompt = None
             st.rerun()
 
@@ -92,10 +90,13 @@ with tab1:
             "Extract diagnostic markers",
             "Summarize embryology stages"
         ])
-        if action != "Select an action...":
+        if action and action != "Select an action...":
             st.session_state.pending_prompt = action
+            st.rerun()
 
-    with col1:
+    chat_col, image_col = st.columns([2, 1])
+    with chat_col:
+        st.markdown("### 💬 Ask a Pathology-Specific Question")
         user_input = st.chat_input("Example: What are features of squamous cell carcinoma?")
         if user_input:
             st.session_state.messages.append({"role": "user", "content": user_input})
@@ -134,8 +135,11 @@ with tab1:
                             reply = m.content[0].text.value.strip()
                             if not any(reply in msg["content"] or msg["content"] in reply for msg in st.session_state.messages if msg["role"] == "assistant"):
                                 st.session_state.messages.append({"role": "assistant", "content": reply})
+
                                 image_matches = re.findall(r'https://raw\.githubusercontent\.com/AndrewLORTech/witspathologai/main/[^\s\n"]+\.png', reply)
-                                st.session_state.image_urls = image_matches
+                                if image_matches:
+                                    st.session_state.image_url = image_matches[0]
+                                    st.session_state.image_updated = True
                             break
                 else:
                     st.error("❌ Assistant failed to respond.")
@@ -147,17 +151,16 @@ with tab1:
             with st.chat_message(msg["role"]):
                 st.markdown(msg["content"], unsafe_allow_html=True)
 
-    if show_image and st.session_state.image_urls:
-        with st.expander("🖼️ Referenced Image(s)", expanded=True):
-            for raw_url in st.session_state.image_urls:
-                try:
-                    r = requests.get(raw_url, timeout=5)
-                    r.raise_for_status()
-                    img = Image.open(BytesIO(r.content))
-                    st.image(img, caption=f"📷 {raw_url.split('/')[-1]}", use_container_width=True)
-                except Exception:
-                    continue
-
+    with image_col:
+        if show_image and st.session_state.image_url:
+            try:
+                r = requests.get(st.session_state.image_url)
+                r.raise_for_status()
+                img = Image.open(BytesIO(r.content))
+                st.image(img, caption="📄 Referenced Image", use_container_width=True)
+            except Exception as e:
+                st.error(f"🖼️ Failed to load image: {e}")
+                
 # ------------------ Tab 2: Visual Reference Search ------------------
 with tab2:
     ASSISTANT_ID = "asst_9v09zgizdcuuhNdcFQpRo9RO"