refactor: standardize CRM views with enterprise UI patterns
- Standardize page headers to text-lg font-semibold with text-xs subtitles
- Replace nx-shell/nx-page patterns with max-w-7xl containers
- Convert all badges to ghost style (badge badge-ghost badge-sm)
- Update card sections to rounded-2xl with header/content structure
- Replace inline SVG icons with heroicons
- Change 'Customer' terminology to 'Account' throughout
- Create missing invoices/create.blade.php view
- Standardize back arrow links with hover transitions
- Fix grid gaps from gap-6 to gap-4 for consistency
Files updated:
- accounts: index, create, edit, contacts-edit, locations-edit
- contacts: index
- deals: index, create, show
- inbox: index
- invoices: index, create (new), show
- leads: index, create, show
- quotes: index, create
- tasks: index, create, show
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