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

frontend/src/components/projects/wizard/StepIndicator.tsx

@@ -0,0 +1,50 @@
+'use client';
+
+/**
+ * Step Indicator Component
+ *
+ * Shows progress through the wizard steps with visual feedback.
+ * Dynamically adjusts based on whether script mode is active.
+ */
+
+import { cn } from '@/lib/utils';
+import { getStepLabels, getDisplayStep, getTotalSteps } from './constants';
+
+interface StepIndicatorProps {
+  currentStep: number;
+  isScriptMode: boolean;
+  className?: string;
+}
+
+export function StepIndicator({ currentStep, isScriptMode, className }: StepIndicatorProps) {
+  const steps = getStepLabels(isScriptMode);
+  const totalSteps = getTotalSteps(isScriptMode);
+  const displayStep = getDisplayStep(currentStep, isScriptMode);
+
+  return (
+    <div className={cn('w-full', className)}>
+      <div className="mb-2 flex items-center justify-between text-sm text-muted-foreground">
+        <span>
+          Step {displayStep} of {totalSteps}
+        </span>
+        <span>{steps[displayStep - 1]}</span>
+      </div>
+      <div className="flex gap-1" role="progressbar" aria-valuenow={displayStep} aria-valuemax={totalSteps}>
+        {Array.from({ length: totalSteps }, (_, i) => (
+          <div
+            key={i}
+            className={cn(
+              'h-2 flex-1 rounded-full transition-colors',
+              i + 1 < displayStep
+                ? 'bg-primary'
+                : i + 1 === displayStep
+                  ? 'bg-primary/70'
+                  : 'bg-muted'
+            )}
+            aria-hidden="true"
+          />
+        ))}
+      </div>
+    </div>
+  );
+}