Improve Loading Indicator for Streaming

Currently, when performing streaming queries, the graph displays a green circle indicating that it's still loading. While this provides a visual cue, I believe the user experience could be enhanced by changing the loading indicator from a static green circle to a pulsating button. A pulsating button would be more noticeable and provide a clearer indication that the system is actively processing the query. ## Proposed Solution: - Replace the static green circle loading indicator with a pulsating button. - Ensure the pulsating effect is subtle yet noticeable, without being distracting. - Maintain consistency in the design language and ensure the new indicator fits well with the overall UI aesthetics. ## Benefits: - Improved user experience by providing a more dynamic and noticeable loading indicator. - Clearer visual feedback for users, reducing uncertainty about whether the system is still processing the query.