Fix remaining dark theme loading states in dashboard

Add final 3 pages: Templates gallery, Contacts CRM, Automation rules

Add new pages: Settings, Integrations, Help/Docs, Logout flow

Signin page: light theme update

Analytics page: light theme update

MessageBubble: light theme update for human messages

Agent editor: light theme update

Update Conversations page styling to design system (light theme, brand gradients)

Conversations components: light theme updates

Conversations inbox: light theme update

Agent wizard: light theme overhaul

Onboarding flow: light theme update

Dashboard light theme overhaul: white sidebar, cream main area, brand accent cards

Design system overhaul: landing page light theme update

Fix business insert - match actual schema