Minor fix suggestions

[Eerosal]

Timetable performance

• Enable memory+disk level caching for thumbnails
• Add memoization to the critical parts
• Use VirtualizedList to reduce rendered elements
• Add a loading transition between days to prevent the app from freezing during rapid page changes
• Use Zustand to interact with AsyncStorage and cache favorites in-memory

Timetable events

• Prevent text from flowing under the favorite button by adding margin
• This update should not change text centering due to the appropriate negative margins

About Webview

• Change background to match the app background instead of being #FFF

Date selector buttons

• Move date selector buttons higher in z-index to prevent issues arising when the app is scaled
• Also makes it possible to add hitSlop to make the buttons easier to use