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__/textarea.spec.tsx

@@ -0,0 +1,28 @@
+import { render, screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { describe, expect, it } from 'vitest';
+import { Textarea } from '../textarea';
+
+describe('Textarea', () => {
+  it('renders a textarea element', () => {
+    render(<Textarea placeholder="Mô tả" />);
+    expect(screen.getByPlaceholderText('Mô tả')).toBeInTheDocument();
+  });
+
+  it('accepts typed input', async () => {
+    render(<Textarea placeholder="Nhập nội dung" />);
+    const textarea = screen.getByPlaceholderText('Nhập nội dung');
+    await userEvent.type(textarea, 'Test content');
+    expect(textarea).toHaveValue('Test content');
+  });
+
+  it('is disabled when disabled prop is set', () => {
+    render(<Textarea disabled placeholder="Disabled" />);
+    expect(screen.getByPlaceholderText('Disabled')).toBeDisabled();
+  });
+
+  it('applies custom className', () => {
+    render(<Textarea className="tall" placeholder="Custom" />);
+    expect(screen.getByPlaceholderText('Custom')).toHaveClass('tall');
+  });
+});