Worked on the matmair/InvenTree repository to enhance dashboard stability by addressing a bug that caused user-configured widget sizes to reset when adding new widgets. Updated the front end layout logic in React to preserve existing widget dimensions, removing forced minimum sizes and ensuring a consistent user experience. Patched the backend profile to persist widget size preferences across sessions, leveraging JavaScript and TypeScript for both client and server changes. Strengthened reliability by introducing deterministic regression tests using Playwright, which manipulate persisted layout data in localStorage to validate addWidget behavior and guard against regressions during continuous integration testing.