feat(frontend): implement main dashboard page (#48)

Implement the main dashboard / projects list page for Syndarix as the landing
page after login. The implementation includes:

Dashboard Components:
- QuickStats: Overview cards showing active projects, agents, issues, approvals
- ProjectsSection: Grid/list view with filtering and sorting controls
- ProjectCardGrid: Rich project cards for grid view
- ProjectRowList: Compact rows for list view
- ActivityFeed: Real-time activity sidebar with connection status
- PerformanceCard: Performance metrics display
- EmptyState: Call-to-action for new users
- ProjectStatusBadge: Status indicator with icons
- ComplexityIndicator: Visual complexity dots
- ProgressBar: Accessible progress bar component

Features:
- Projects grid/list view with view mode toggle
- Filter by status (all, active, paused, completed, archived)
- Sort by recent, name, progress, or issues
- Quick stats overview with counts
- Real-time activity feed sidebar with live/reconnecting status
- Performance metrics card
- Create project button linking to wizard
- Responsive layout for mobile/desktop
- Loading skeleton states
- Empty state for new users

API Integration:
- useProjects hook for fetching projects (mock data until backend ready)
- useDashboardStats hook for statistics
- TanStack Query for caching and data fetching

Testing:
- 37 unit tests covering all dashboard components
- E2E test suite for dashboard functionality
- Accessibility tests (keyboard nav, aria attributes, heading hierarchy)

Technical:
- TypeScript strict mode compliance
- ESLint passing
- WCAG AA accessibility compliance
- Mobile-first responsive design
- Dark mode support via semantic tokens
- Follows design system guidelines

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/tests/features/issues/components/StatusBadge.test.tsx

@@ -0,0 +1,49 @@
+/**
+ * StatusBadge Component Tests
+ */
+
+import { render, screen } from '@testing-library/react';
+import { StatusBadge } from '@/features/issues/components/StatusBadge';
+import type { IssueStatus } from '@/features/issues/types';
+
+const statusLabels: Record<IssueStatus, string> = {
+  open: 'Open',
+  in_progress: 'In Progress',
+  in_review: 'In Review',
+  blocked: 'Blocked',
+  done: 'Done',
+  closed: 'Closed',
+};
+
+describe('StatusBadge', () => {
+  const statuses: IssueStatus[] = ['open', 'in_progress', 'in_review', 'blocked', 'done', 'closed'];
+
+  it.each(statuses)('renders %s status correctly', (status) => {
+    render(<StatusBadge status={status} />);
+
+    // Check that the status text is present - use getAllByText since we have both visible and sr-only
+    const elements = screen.getAllByText(statusLabels[status]);
+    expect(elements.length).toBeGreaterThanOrEqual(1);
+  });
+
+  it('hides label when showLabel is false', () => {
+    render(<StatusBadge status="open" showLabel={false} />);
+
+    // The sr-only text should still be present
+    expect(screen.getByText('Open')).toHaveClass('sr-only');
+  });
+
+  it('applies custom className', () => {
+    const { container } = render(<StatusBadge status="open" className="custom-class" />);
+
+    const wrapper = container.firstChild;
+    expect(wrapper).toHaveClass('custom-class');
+  });
+
+  it('renders with accessible label', () => {
+    render(<StatusBadge status="open" showLabel={false} />);
+
+    // Should have sr-only text for screen readers
+    expect(screen.getByText('Open')).toBeInTheDocument();
+  });
+});