feat(cache): implement Redis caching for search & analytics hot paths

- Add TTL-specific cache durations: district stats (5min), market report (15min), heatmap (5min)
- Add Redis caching to GeoSearch handler with 60s TTL
- Add cache invalidation on listing.approved, listing.updated, listing.deactivated, listing.sold events
- Invalidate search, geo_search, and all analytics cache prefixes on listing state changes
- Update tests for new CacheService dependency in event handler and geo-search handler

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/components/ui/__tests__/card.spec.tsx

@@ -0,0 +1,40 @@
+import { render, screen } from '@testing-library/react';
+import { describe, expect, it } from 'vitest';
+import { Card, CardHeader, CardTitle, CardDescription, CardContent, CardFooter } from '../card';
+
+describe('Card', () => {
+  it('renders card with all sub-components', () => {
+    render(
+      <Card data-testid="card">
+        <CardHeader>
+          <CardTitle>Title</CardTitle>
+          <CardDescription>Description</CardDescription>
+        </CardHeader>
+        <CardContent>Content</CardContent>
+        <CardFooter>Footer</CardFooter>
+      </Card>,
+    );
+
+    expect(screen.getByTestId('card')).toBeInTheDocument();
+    expect(screen.getByText('Title')).toBeInTheDocument();
+    expect(screen.getByText('Description')).toBeInTheDocument();
+    expect(screen.getByText('Content')).toBeInTheDocument();
+    expect(screen.getByText('Footer')).toBeInTheDocument();
+  });
+
+  it('applies custom className to Card', () => {
+    render(<Card data-testid="card" className="custom">Content</Card>);
+    expect(screen.getByTestId('card')).toHaveClass('custom');
+    expect(screen.getByTestId('card')).toHaveClass('rounded-lg');
+  });
+
+  it('renders CardTitle as h3', () => {
+    render(<CardTitle>My Title</CardTitle>);
+    expect(screen.getByRole('heading', { level: 3 })).toHaveTextContent('My Title');
+  });
+
+  it('renders CardDescription as paragraph', () => {
+    render(<CardDescription>My Description</CardDescription>);
+    expect(screen.getByText('My Description').tagName).toBe('P');
+  });
+});