Add Playwright E2E tests for both new pages:
main-dashboard.spec.ts:
- Welcome header with user name
- Quick stats cards display
- Recent projects section with View all link
- Navigation, accessibility, responsive layout
projects-list.spec.ts:
- Page header with create button
- Search and filter controls
- Grid/list view toggle
- Project card interactions
- Filter and empty state behavior
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
