feat: add MFA/TOTP auth, PII encryption, agents/leads/inquiries modules, and comprehensive tests

- Add TOTP-based MFA with setup, verify, disable, backup codes, and challenge flow
- Add PII field encryption middleware with AES-256-GCM and deterministic search hashes
- Add agents, inquiries, and leads domain modules with entities, events, value objects
- Add web dashboard pages for inquiries and leads with detail dialogs
- Add 30+ component tests (valuation, charts, listings, search, providers, UI)
- Add Prisma migrations for encryption hash columns and MFA TOTP support
- Fix all ESLint errors (unused imports, duplicate imports, lint auto-fixes)
- Update dependencies and lock file
- Clean up obsolete exploration/QA docs, add audit documentation

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

apps/web/components/valuation/__tests__/valuation-results.spec.tsx

@@ -0,0 +1,110 @@
+import { render, screen } from '@testing-library/react';
+import { describe, expect, it } from 'vitest';
+import type { ValuationResult } from '@/lib/valuation-api';
+import { ValuationResults } from '../valuation-results';
+
+const mockResult: ValuationResult = {
+  id: 'val-1',
+  estimatedPriceVND: 5_000_000_000,
+  confidence: 0.87,
+  pricePerM2: 62_500_000,
+  priceRangeLow: 4_500_000_000,
+  priceRangeHigh: 5_500_000_000,
+  comparables: [
+    {
+      id: 'comp-1',
+      title: 'Căn hộ tương tự A',
+      address: '456 Nguyễn Hữu Thọ',
+      district: 'Quận 7',
+      priceVND: '4800000000',
+      areaM2: 78,
+      pricePerM2: 61_500_000,
+      similarity: 0.92,
+    },
+    {
+      id: 'comp-2',
+      title: 'Căn hộ tương tự B',
+      address: '789 Phạm Viết Chánh',
+      district: 'Bình Thạnh',
+      priceVND: '5200000000',
+      areaM2: 82,
+      pricePerM2: 63_400_000,
+      similarity: 0.85,
+    },
+  ],
+  priceDrivers: [
+    { feature: 'Vị trí trung tâm', impact: 15.5, direction: 'positive' },
+    { feature: 'Tầng thấp', impact: -5.2, direction: 'negative' },
+  ],
+  modelVersion: 'v1.0',
+  createdAt: '2026-01-15T10:00:00Z',
+};
+
+describe('ValuationResults', () => {
+  it('renders estimated price', () => {
+    render(<ValuationResults result={mockResult} />);
+    expect(screen.getByText('5.00 ty VND')).toBeInTheDocument();
+  });
+
+  it('renders confidence percentage', () => {
+    render(<ValuationResults result={mockResult} />);
+    expect(screen.getByText('87%')).toBeInTheDocument();
+  });
+
+  it('renders price per m2', () => {
+    render(<ValuationResults result={mockResult} />);
+    expect(screen.getByText('62.5 tr/m2')).toBeInTheDocument();
+  });
+
+  it('renders price range', () => {
+    render(<ValuationResults result={mockResult} />);
+    expect(screen.getByText(/4\.50 ty.*5\.50 ty/)).toBeInTheDocument();
+  });
+
+  it('renders price drivers section', () => {
+    render(<ValuationResults result={mockResult} />);
+    expect(screen.getByText('Yeu to anh huong gia')).toBeInTheDocument();
+    expect(screen.getByText('Vị trí trung tâm')).toBeInTheDocument();
+    expect(screen.getByText('Tầng thấp')).toBeInTheDocument();
+  });
+
+  it('shows positive driver with + sign', () => {
+    render(<ValuationResults result={mockResult} />);
+    expect(screen.getByText('+15.5%')).toBeInTheDocument();
+  });
+
+  it('shows negative driver with - sign', () => {
+    render(<ValuationResults result={mockResult} />);
+    expect(screen.getByText('-5.2%')).toBeInTheDocument();
+  });
+
+  it('renders comparables section', () => {
+    render(<ValuationResults result={mockResult} />);
+    expect(screen.getByText('Bat dong san tuong tu')).toBeInTheDocument();
+    expect(screen.getByText('Căn hộ tương tự A')).toBeInTheDocument();
+    expect(screen.getByText('Căn hộ tương tự B')).toBeInTheDocument();
+  });
+
+  it('shows comparable count', () => {
+    render(<ValuationResults result={mockResult} />);
+    expect(screen.getByText(/2 bat dong san/)).toBeInTheDocument();
+  });
+
+  it('shows similarity percentage for comparables', () => {
+    render(<ValuationResults result={mockResult} />);
+    expect(screen.getByText('92% tuong tu')).toBeInTheDocument();
+    expect(screen.getByText('85% tuong tu')).toBeInTheDocument();
+  });
+
+  it('hides drivers section when empty', () => {
+    const noDrivers = { ...mockResult, priceDrivers: [] };
+    render(<ValuationResults result={noDrivers} />);
+    expect(screen.queryByText('Yeu to anh huong gia')).not.toBeInTheDocument();
+  });
+
+  it('hides comparables section when empty', () => {
+    const noComps = { ...mockResult, comparables: [] };
+    render(<ValuationResults result={noComps} />);
+    expect(screen.queryByText('Bat dong san tuong tu')).not.toBeInTheDocument();
+  });
+});