Veronika-iv-st/LLM-Powered-Finance-Agent-VAT-Discounts-More

AI Summary: Design a simple web UI for a console-based LangChain application that allows users to input natural language financial calculations (e.g., 'Apply 15% discount to 240'), and displays the results. The UI should include a text input, language selection dropdown (English/Spanish), and a result display area. A fully functional implementation is not required; a design proposal (sketch, wireframe, or basic HTML/CSS/JS mockup) is sufficient.

AI Summary: Write unit tests using pytest or unittest for three Python functions: `apply_vat`, `apply_discount`, and `calculate_sum`, located in `tools.py`. Each function requires at least two test cases covering normal and edge cases (decimals, zero, large numbers). The tests should be placed in a new file named `test_tools.py`.

AI Summary: This task requires extending an existing LangChain-based application to support Spanish language input. This involves creating a Spanish version of the prompt used for classifying user requests (adding/discounting/summing values), translating CLI messages to Spanish, and implementing language switching functionality in the main application script. The user can either select the language manually or (optionally) automatic language detection can be implemented.