chore(cache): auto-bump cache version before push

Clean up misleading comments in welcome page code

Restore beautiful original welcome page design with enhancements

Redesign welcome page as main dashboard and create contributors page

Enhanced welcome page with interactive Tezpur map background

Fix demo login: proper naming and soothing colors

Transform welcome screen: exact content + beautiful minimal design

Major simplification: streamline conference flow

Simplify conference flow: demo account stays logged in

Add conference welcome screen with non-linear exploration design