feat: improve UI/UX with scroll behavior and styling enhancements

- Remove white space at bottom of chat interface
- Prevent scroll bounce/overscroll behavior on all scroll areas
- Make scroll bar thinner and more subtle with low contrast
- Add hover effects for scroll bar visibility
- Clean up Docker container names for better display
- Improve overall scrolling experience and visual polish

docker-compose.yml

@@ -4,6 +4,7 @@ volumes:
 services:
   langgraph-redis:
     image: docker.io/redis:6
+    container_name: langgraph-redis
     healthcheck:
       test: redis-cli ping
       interval: 5s
@@ -11,6 +12,7 @@ services:
       retries: 5
   langgraph-postgres:
     image: docker.io/postgres:16
+    container_name: langgraph-postgres
     ports:
       - "5433:5432"
     environment:
@@ -27,6 +29,7 @@ services:
       interval: 5s
   langgraph-api:
     image: gemini-fullstack-langgraph
+    container_name: langgraph-api
     ports:
       - "8123:8000"
     depends_on: