feat: Initial CBPOA commit — 武汉儿童呼吸疾病风险评估系统

Context: Build a spatial risk assessment system correlating air quality
data with children's respiratory disease incidence across Wuhan.

Approach: FastAPI backend serving PostGIS spatial queries, React
frontend with Deck.gl maps, and a PyTorch SpatialTemporalGCN pipeline
for multi-day (1d/3d/7d) risk prediction.

Changes:
- backend/ — FastAPI API with auth (JWT), alerts, risk analysis,
  geocoded case data, grid statistics, and report endpoints
- frontend/ — React dashboard with interactive risk maps, alert
  monitoring, district comparison charts, and timeline player
- models/ — SpatialTemporalGCN model with trained weights and ONNX
  export for inference
- scripts/ — ETL pipeline for weather + medical data, grid generation,
  feature engineering, training, and daily inference
- deploy/ — Docker Compose configs for backend, frontend, and MLflow
- docs/ — API docs, deployment guide, user guide, and code review

Impact: Enables spatial risk visualization, alert monitoring, and
ML-driven health risk forecasting for environmental health teams.

frontend/e2e/api.spec.ts

@@ -0,0 +1,84 @@
+import { test, expect } from '@playwright/test';
+
+const API_BASE = 'http://localhost:8000';
+
+test.describe('API Endpoints', () => {
+  test('health check', async ({ request }) => {
+    const response = await request.get(`${API_BASE}/health`);
+    expect(response.ok()).toBeTruthy();
+    expect(await response.json()).toHaveProperty('status');
+  });
+
+  test('historical aggregation API', async ({ request }) => {
+    const response = await request.get(
+      `${API_BASE}/api/history/aggregated?start_date=2022-12-01&end_date=2022-12-31`
+    );
+    expect(response.ok()).toBeTruthy();
+    const data = await response.json();
+    expect(data).toHaveProperty('aggregations');
+    expect(data).toHaveProperty('total_records');
+  });
+
+  test('grids geojson API', async ({ request }) => {
+    const response = await request.get(
+      `${API_BASE}/api/grids/geojson?date=2022-12-15`
+    );
+    expect(response.ok()).toBeTruthy();
+    const data = await response.json();
+    expect(data).toHaveProperty('type', 'FeatureCollection');
+    expect(data).toHaveProperty('features');
+  });
+
+  test('multi-day prediction API', async ({ request }) => {
+    const response = await request.post(`${API_BASE}/api/predict/multi-day`, {
+      data: { date: '2022-12-15', days: 3 },
+      headers: { 'Content-Type': 'application/json' },
+    });
+    expect(response.ok()).toBeTruthy();
+    const data = await response.json();
+    expect(data).toHaveProperty('predictions');
+    expect(data).toHaveProperty('date_range');
+  });
+
+  test('grid history API', async ({ request }) => {
+    const response = await request.get(
+      `${API_BASE}/api/grids/r100_c200/history?days=7`
+    );
+    expect(response.ok()).toBeTruthy();
+    const data = await response.json();
+    expect(data).toHaveProperty('grid_id');
+    expect(data).toHaveProperty('history');
+  });
+});
+
+test.describe('Frontend Pages', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.goto('http://localhost:3000');
+  });
+
+  test('home page loads', async ({ page }) => {
+    await expect(page).toHaveTitle(/CBPOA|监测|预警/);
+  });
+
+  test('monitoring dashboard has timeline', async ({ page }) => {
+    await page.goto('http://localhost:3000/monitoring');
+    await expect(page.locator('text=累计病例')).toBeVisible({ timeout: 10000 });
+  });
+
+  test('no console errors on load', async ({ page }) => {
+    const errors: string[] = [];
+    page.on('console', (msg) => {
+      if (msg.type() === 'error') {
+        errors.push(msg.text());
+      }
+    });
+
+    await page.goto('http://localhost:3000');
+    await page.waitForTimeout(2000);
+
+    const filteredErrors = errors.filter(
+      (e) => !e.includes('favicon') && !e.includes('404')
+    );
+    expect(filteredErrors).toHaveLength(0);
+  });
+});