GH-300-GitHub-Copilot-Demos

Add a new section to the Budget Buddy monthly report. Use when asked to add, extend, or include a new metric, breakdown, or summary (for example "top merchants", "weekly spend", or "category trend") in the report produced by main.py.

Run the Budget Buddy test suite with a coverage report. Use when asked to run tests, check coverage, see the coverage report, or verify the coverage gate before or after making changes.