Dev fixes expired JWT dead-ends and refactors bloated components before building new features

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A developer working on a personal expense-tracking app tackled two previously flagged technical debts before adding any new features: silent session expiry and poor visual design. When JWTs expired after 30 minutes, the app continued showing a logged-in state while rejecting all backend requests with 401 errors, stranding users with no automatic way out. To fix the token expiry issue cleanly, the developer first had to split two oversized components — App and ExpenseList — into smaller, focused ones so that logout logic could be properly passed down via props. Tailwind CSS v4 was then installed and used to restyle the login screen as a centered card and the main view as a dashboard shell. The developer noted that resolving one technical debt exposed another, reflecting a broader lesson that interconnected code problems rarely arrive alone.

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