Add server availability retry logic with graceful startup handling

app.py

@@ -671,14 +671,24 @@ if "session_id" not in st.session_state:
     </div>
     """, unsafe_allow_html=True)
 
-    try:
-        if requests.get(f"{st.secrets.server.ip_address}/").status_code != 200:
-            raise Exception
-    except:
-        st.error(
-            "🚫 Server is not reachable. Please check your connection or server status.", icon="🔌"
-        )
-        st.stop()
+    # Check server availability with retries
+    max_retries = 5
+    retry_delay = 2  # seconds
+    server_ready = False
+
+    for attempt in range(max_retries):
+        try:
+            if requests.get(f"{st.secrets.server.ip_address}/", timeout=5).status_code == 200:
+                server_ready = True
+                break
+        except:
+            if attempt < max_retries - 1:
+                st.info(f"🔄 Initializing services... ({attempt + 1}/{max_retries})")
+                import time
+                time.sleep(retry_delay)
+            else:
+                st.error("🚫 Server is not reachable. Please check your connection or server status.", icon="🔌")
+                st.stop()
 
     # Create two-column layout with proper sizing
     col_left, col_right = st.columns([1, 1.2], gap="large")