fix(mobile): preserve notification deep links on launch

[dhairyashiil]

Screen.Recording.2026-06-29.at.1.14.34.PM.mov

Summary

• Prevent the first-page preference redirect from overriding explicit nested tab routes, such as booking-detail notification deep links.
• Add a pure landing redirect decision helper with Jest coverage for root, default bookings, unconfirmed bookings, and booking-detail paths.

Test Plan

• cd apps/mobile && bun run test -- landing-page-navigation
• bun --filter mobile typecheck

Manual Validation

• Tested locally with a temporary dummy booking notification hook, then removed the temporary code before publishing.

[vercel]

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[cubic-dev-ai]

No issues found across 3 files

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