diff --git a/backend/app/core/orchestration/queue_manager.py b/backend/app/core/orchestration/queue_manager.py
index 346bc9a..885424b 100644
--- a/backend/app/core/orchestration/queue_manager.py
+++ b/backend/app/core/orchestration/queue_manager.py
@@ -41,7 +41,7 @@ async def connect(self):
                 await self.channel.declare_queue(queue_name, durable=True)
             logger.info("Successfully connected to RabbitMQ")
         except Exception as e:
-            logger.error(f"Failed to connect to RabbitMQ: {e}")
+            logger.error(f"Failed to connect to RabbitMQ: {e}", exc_info=True)
             raise
 
     async def start(self, num_workers: int = 3):
@@ -79,14 +79,22 @@ async def enqueue(self,
         if delay > 0:
             await asyncio.sleep(delay)
 
+        # Guard against publishing while disconnected
+        if not self.channel or self.channel.is_closed:
+            raise RuntimeError("Queue channel is not connected. Call start() before enqueue().")
+
         queue_item = {
             "id": message.get("id", f"msg_{datetime.now().timestamp()}"),
-            "priority": priority,
+            "priority": priority.value,  # Serialize enum to string
             "data": message
         }
         json_message = json.dumps(queue_item).encode()
         await self.channel.default_exchange.publish(
-            aio_pika.Message(body=json_message),
+            aio_pika.Message(
+                body=json_message,
+                delivery_mode=aio_pika.DeliveryMode.PERSISTENT,
+                content_type="application/json"
+            ),
             routing_key=self.queues[priority]
         )
         logger.info(f"Enqueued message {queue_item['id']} with priority {priority}")
@@ -114,13 +122,13 @@ async def _worker(self, worker_name: str):
                             await self._process_item(item, worker_name)
                             await message.ack()
                         except Exception as e:
-                            logger.error(f"Error processing message: {e}")
+                            logger.error("Error processing message: %s", e, exc_info=True)
                             await message.nack(requeue=False)
                 except asyncio.CancelledError:
                     logger.info(f"Worker {worker_name} cancelled")
                     return
                 except Exception as e:
-                    logger.error(f"Worker {worker_name} error: {e}")
+                    logger.error("Worker %s error: %s", worker_name, e, exc_info=True)
             await asyncio.sleep(0.1)
 
     async def _process_item(self, item: Dict[str, Any], worker_name: str):
diff --git a/backend/app/database/weaviate/client.py b/backend/app/database/weaviate/client.py
index 5ed11ed..5132596 100644
--- a/backend/app/database/weaviate/client.py
+++ b/backend/app/database/weaviate/client.py
@@ -1,19 +1,14 @@
 import weaviate
+import weaviate.exceptions
 from contextlib import asynccontextmanager
 from typing import AsyncGenerator
 import logging
 
 logger = logging.getLogger(__name__)
 
-_client = None
-
-
 def get_client():
-    """Get or create the global Weaviate client instance."""
-    global _client
-    if _client is None:
-        _client = weaviate.use_async_with_local()
-    return _client
+    """Create a new async Weaviate client instance per context use."""
+    return weaviate.use_async_with_local()
 
 @asynccontextmanager
 async def get_weaviate_client() -> AsyncGenerator[weaviate.WeaviateClient, None]:
@@ -22,11 +17,11 @@ async def get_weaviate_client() -> AsyncGenerator[weaviate.WeaviateClient, None]
     try:
         await client.connect()
         yield client
-    except Exception as e:
-        logger.error(f"Weaviate client error: {str(e)}")
+    except weaviate.exceptions.WeaviateBaseError as e:
+        logger.error("Weaviate client error: %s", e, exc_info=True)
         raise
     finally:
         try:
             await client.close()
         except Exception as e:
-            logger.warning(f"Error closing Weaviate client: {str(e)}")
+            logger.warning("Error closing Weaviate client: %s", e, exc_info=True)
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 9f70aa6..f506220 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -47,7 +47,6 @@ function App() {
     supabase.auth.getSession().then(({ data, error }) => {
       if (error) {
         toast.error('User Login Failed');
-        console.error('Error checking session:', error);
         return;
       }
       setIsAuthenticated(!!data.session);
@@ -93,7 +92,6 @@ function App() {
     const { error } = await supabase.auth.signOut();
     if (error) {
       toast.error('Logout failed');
-      console.error('Error during logout:', error);
       return;
     }
     toast.success('Signed out!');
diff --git a/frontend/src/components/integration/BotIntegration.tsx b/frontend/src/components/integration/BotIntegration.tsx
index 813c251..99dcf2a 100644
--- a/frontend/src/components/integration/BotIntegration.tsx
+++ b/frontend/src/components/integration/BotIntegration.tsx
@@ -47,7 +47,13 @@ const BotIntegration: React.FC<BotIntegrationProps> = ({
         setIntegration(null);
       }
     } catch (error) {
-      console.error('Error loading integration status:', error);
+      // Handle integration status loading errors
+      setIsConnected(false);
+      setIntegration(null);
+      // Log in development for debugging
+      if (import.meta.env.DEV) {
+        console.error('Failed to load integration status:', error);
+      }
     }
   };
 
diff --git a/frontend/src/lib/api.ts b/frontend/src/lib/api.ts
index 963ca3b..553c1bf 100644
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -83,10 +83,15 @@ class ApiClient {
         // Add response interceptor for error handling
         this.client.interceptors.response.use(
             (response) => response,
-            (error) => {
+            async (error) => {
                 if (error.response?.status === 401) {
-                    // Handle unauthorized - could redirect to login
-                    console.error('Unauthorized request');
+                    // Clear session and redirect to login
+                    // Avoid infinite redirect loop if already on login page
+                    if (!window.location.pathname.includes('/login')) {
+                        await supabase.auth.signOut();
+                        const returnUrl = encodeURIComponent(window.location.pathname + window.location.search);
+                        window.location.href = `/login?returnUrl=${returnUrl}`;
+                    }
                 }
                 return Promise.reject(error);
             }
@@ -166,7 +171,10 @@ class ApiClient {
             const response = await this.client.get('/v1/health');
             return response.status === 200;
         } catch (error) {
-            console.error('Backend health check failed:', error);
+            // Log in development for debugging
+            if (import.meta.env.DEV) {
+                console.error('Health check failed:', error);
+            }
             return false;
         }
     }