Fix React dependency conflict for schedule view

[CarterH93]

Summary

• refresh the global theme with updated typography, gradients, and button styles
• modernize navigation, home content, modal dialogs, and schedule cards with glass-like surfaces
• bring authentication and favorites pages into the new design system with cohesive cards and spacing
• align the React packages with react-schedule-view and fix the AddClass import casing so builds succeed

Testing

• npm install
• npm run build

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https://chatgpt.com/codex/tasks/task_e_69015f1cb694832683fa467033cc7a66