test : added unit tests for authStore logout flow

[tmdeveloper007]

Closes #2060.

Summary of What Has Been Done:
Added unit tests for the authStore logout flow. Also fixed a security bug where user state was not cleared when signOut failed.

Changes Made:

• Created Frontend/src/store/authStore.test.js with 8 test cases
• Mocks supabase.auth.signOut and ticketStore methods
• Tests: successful logout, signOut call, ticketStore.clearTicket, ticketStore.setState, loading state, error handling
• Fixed authStore.js: moved state clearing from try block to finally block
• This ensures user data is cleared even when signOut fails (network error, etc.)
• Prevents cross-user data leakage on logout error paths

Impact it Made:

• Critical security fix: prevents stale user data after logout failure
• All 8 tests pass (verified with vitest run)
• No new lint errors introduced

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 0b831136-1f0b-44fd-aff3-7ac99f68addd

📥 Commits

Reviewing files that changed from the base of the PR and between da8faf2 and 50896cd.

📒 Files selected for processing (2)

• Frontend/src/store/authStore.js
• Frontend/src/store/authStore.test.js

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[riteshbonthalakoti]

Superb implementation, @tmdeveloper007! I've successfully resolved all conflicts in your PR and queued it for merging into gssoc.

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