Task: Develop a simple expense tracker. Allow input of expenses and visualize data. Use a modern GUI library. No external assets. Config: ChatEnvConfig.clear_structure: True ChatEnvConfig.brainstorming: False Roster: Chief Executive Officer, Counselor, Chief Human Resource Officer, Chief Product Officer, Chief Technology Officer, Programmer, Code Reviewer, Software Test Engineer, Chief Creative Officer Modality: web application Ideas: Language: Python Code_Version: 6.0 Proposed_images: 0 Incorporated_images: 0