style(dashboard): Refine primary header hover and focus states, add inbox animation

[rifont]

What changed? Why was the change needed?

• Header updates
  • Add consistent hover and focus states for all headers (Help, Inbox, Profile)
  • Add tooltips for Help and Inbox headers (inspired by Stripe)
• Inbox updates
  • Add correct inbox bell icon
  • Add API + Websocket backend environment variables to Inbox
  • Add inbox bell jingle animation when new notification is received
  • Add inbox bell pulse animation when unread notifications are present
  • Show count of unread notifications on the Inbox tooltip
• Tooltip updates
  • Refactor TooltipProvider to App entry point
  • Set delayDuration to 100ms to set tooltip delay time everywhere

Screenshots

Header demonstration of hover, focus, and animations

https://github.com/user-attachments/assets/c5f3c39c-f0d0-41a7-9e37-1dbc8d956c44

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