Worked on the evcc-io/evcc repository, focusing on improving the accuracy and reliability of forecast data displays for users. Addressed a critical bug in the forecast data minimum handling by refining how zero values are treated, using the nullish coalescing operator in TypeScript to ensure correct interpretation. This targeted fix prevented erroneous minimum markers in charts and aligned the forecast logic with business requirements for energy forecasting. The solution was validated through end-to-end checks and delivered as a concise, maintainable code change. Demonstrated strong front end development skills and attention to code quality, with clear commit messaging and minimal diff.