refactor: bookings refactor

[zsh-eng]

• refactor: memoise calculations
• refactor: extract menu to own component
• refactor: remove unnecessary animations
• feat: add type guard to auth helper
• style: update styles to handle long venue names

[vercel[bot]]

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Name	Status	Preview	Comments	Updated (UTC)
usc-website-hackathon-frontend	❌ Failed (Inspect)			Feb 25, 2024 10:54pm