Migrate dashboard from Angular to React 18

Migration Task

Migrate the main dashboard from Angular 12 to React 18 as part of our platform modernization.

Scope

• Dashboard overview page
• User stats widgets
• Real-time activity feed
• Navigation sidebar

Technical Approach

• Use React 18 concurrent features
• Implement Suspense for data fetching
• Migrate Redux store to Redux Toolkit
• Convert Angular services to React hooks

Blockers

• ⚠️ BLOCKED by #1 (closed) - Must fix React XSS vulnerability first
• ⚠️ BLOCKED by ui-component-library#6 (closed) - Waiting for lodash security fix

Dependencies on Other Projects

• Needs ui-component-library Button, Input components
• Requires shared authentication hooks

Acceptance Criteria

• All dashboard features working
• Performance metrics improved (LCP < 2.5s)
• Unit tests at 85%+ coverage
• E2E tests passing

cc: @jean_gabriel @bob