Fix bad input and close navbar on route change

[bcho892]

Straightfoward fixes:

• dont handle untruthy values in slot input
• listen for changes in current route (using useLocation hook)

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 382250b):

https://uasc-ceebc--pr399-397-frontend-fix-mob-l74oes3a.web.app

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