Sidebar UI Reorganization and Map Performance Optimization

[austinkden]

This change modernizes the application's UI by organizing the sidebar into a cleaner, more focused layout. It introduces collapsible dropdowns for secondary features and adds dedicated inputs for future routing functionality. Additionally, it improves the user experience by eliminating the delay when switching map layers through a dual-overlay opacity strategy.

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PR created automatically by Jules for task 15412426492729673860 started by @austinkden

[google-labs-jules]

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[austinkden]

@jules Swap the icons of the starting input and the destination input. The starting input should have the location arrow, and the destination input should have the location pin. Also, please give each of the new dropdowns an icon. The settings icon should have a basic settings gear icon, and the player location fetching icon should be a car.

[google-labs-jules]

@jules Swap the icons of the starting input and the destination input. The starting input should have the location arrow, and the destination input should have the location pin. Also, please give each of the new dropdowns an icon. The settings icon should have a basic settings gear icon, and the player location fetching icon should be a car.

I have updated the icons as requested. The starting input now uses the navigation arrow, and the destination input uses the location pin. Additionally, I've added the settings gear icon to the Settings dropdown and a car icon to the Player Location Fetching dropdown.