Improve Test Coverage for QRGenerationPage.tsx

The file QRGenerationPage.tsx currently has insufficient test coverage, with the following metrics:

Statements: 54.05% Branches: 64.51% Functions: 60% Lines: 55.55% Uncovered lines: 67–76, 83–102

Problem:

Critical parts of the QR generation logic and UI behavior are not covered by unit tests. This increases the risk of:

Undetected bugs in QR generation flow Broken edge-case handling (e.g., invalid input, API failures) Reduced confidence during refactoring

Impact:

Affects developers working on QR-related features Reduces overall code reliability and maintainability Fails to meet expected test coverage standards

Reproduction:

Run test coverage:

npm run test -- --coverage Navigate to coverage report Observe uncovered lines in QRGenerationPage.tsx

Expected Behavior:

All critical logic paths, UI states, and edge cases in QRGenerationPage.tsx should be covered by unit tests, achieving at least 80%+ coverage.