Add a unit test for the useGuidedTour step progression and persistence

[Baskarayelu]

Closes #984

Summary

• Add src/hooks/__tests__/useGuidedTour.test.ts with 12 focused test cases covering step progression and localStorage persistence
• Tests cover: auto-start on fresh visit, no auto-start when tour previously seen, next/prev navigation, bounds (cannot go below 0, ends tour past last step), wizard-step boundary transitions, skip from any step, corrupted persisted value, startTour reset, currentStepConfig correctness, and totalSteps count
• localStorage mocked via jsdom happy-dom environment; fetch stubbed with vi.stubGlobal

Test plan

• pnpm test src/hooks/__tests__/useGuidedTour.test.ts passes green
• No regressions against existing test suites

🤖 Generated with Claude Code

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