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/src/features/issues/components/BulkActions.tsx

@@ -0,0 +1,70 @@
+'use client';
+
+/**
+ * BulkActions Component
+ *
+ * Actions bar for bulk operations on selected issues.
+ *
+ * @module features/issues/components/BulkActions
+ */
+
+import { Trash2 } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { Separator } from '@/components/ui/separator';
+import { cn } from '@/lib/utils';
+
+interface BulkActionsProps {
+  selectedCount: number;
+  onChangeStatus: () => void;
+  onAssign: () => void;
+  onAddLabels: () => void;
+  onDelete: () => void;
+  className?: string;
+}
+
+export function BulkActions({
+  selectedCount,
+  onChangeStatus,
+  onAssign,
+  onAddLabels,
+  onDelete,
+  className,
+}: BulkActionsProps) {
+  if (selectedCount === 0) return null;
+
+  return (
+    <div
+      className={cn(
+        'flex items-center gap-4 rounded-lg border bg-muted/50 p-3',
+        className
+      )}
+      role="toolbar"
+      aria-label="Bulk actions for selected issues"
+    >
+      <span className="text-sm font-medium">
+        {selectedCount} selected
+      </span>
+      <Separator orientation="vertical" className="h-6" />
+      <div className="flex gap-2">
+        <Button variant="outline" size="sm" onClick={onChangeStatus}>
+          Change Status
+        </Button>
+        <Button variant="outline" size="sm" onClick={onAssign}>
+          Assign
+        </Button>
+        <Button variant="outline" size="sm" onClick={onAddLabels}>
+          Add Labels
+        </Button>
+        <Button
+          variant="outline"
+          size="sm"
+          className="text-destructive hover:text-destructive"
+          onClick={onDelete}
+        >
+          <Trash2 className="mr-2 h-4 w-4" aria-hidden="true" />
+          Delete
+        </Button>
+      </div>
+    </div>
+  );
+}