Addresses issues where budget and expense data were not displaying correctly on the summary cards, category bar graph, and transaction/analytics pages. Also fixes a bug where data was disappearing after input.
Refactors the `useBudgetState.ts` file into smaller, more manageable files to improve code organization and maintainability. No functionality is changed.
The data initialization logic was not properly clearing existing data, leading to incorrect budget values. This commit ensures that all relevant data is cleared upon initialization.
