feat: implement Haptika PPG and Watch V1

src/features/ppg/tests/metricInsights.test.ts

@@ -0,0 +1,63 @@
+import {buildMetricInsights} from '../insights/metricInsights';
+import type {StoredMeasurement} from '../storage/storageTypes';
+import {makeProcessingResult} from './syntheticMeasurements';
+
+const stored = (index: number, bpm: number, rmssd: number): StoredMeasurement => ({
+  schemaVersion: 1,
+  algorithmVersion: 'test',
+  acquisition: {cameraPosition: 'front', torchUsed: false},
+  id: `stored-${index}`,
+  measuredAt: new Date(Date.UTC(2026, 6, index + 1, 8)).toISOString(),
+  atRest: true,
+  baselineEligible: true,
+  cameraResult: makeProcessingResult({
+    bpm: {...makeProcessingResult().bpm, bpm},
+    prv: {...makeProcessingResult().prv, estimatedRmssdMs: rmssd},
+  }),
+  potentialStress: {
+    index: null,
+    status: 'baselineBuilding',
+    confidence: 0,
+    bpmContribution: null,
+    prvContribution: null,
+    signalQuality: 0.9,
+    baselineMeasurementCount: 0,
+    healthKitUsedForScore: false,
+    limitations: [],
+  },
+  healthKitContext: null,
+  selfReport: null,
+});
+
+describe('buildMetricInsights', () => {
+  it('uses real historical measurements and creates personal ranges after five values', () => {
+    const history = [
+      stored(0, 70, 40),
+      stored(1, 71, 41),
+      stored(2, 69, 39),
+      stored(3, 72, 42),
+      stored(4, 70, 40),
+    ];
+    const insights = buildMetricInsights(history[4]!.cameraResult, history);
+    const bpm = insights.find(insight => insight.key === 'bpm');
+    const rmssd = insights.find(insight => insight.key === 'rmssd');
+
+    expect(bpm?.trend).toHaveLength(5);
+    expect(bpm?.referenceRange).not.toBeNull();
+    expect(bpm?.status).toBe('Dans votre repère habituel');
+    expect(rmssd?.trend.map(point => point.value)).toEqual([40, 41, 39, 42, 40]);
+  });
+
+  it('never publishes PRV insights when the current PRV is unreliable', () => {
+    const current = makeProcessingResult({
+      prv: {...makeProcessingResult().prv, reliable: false},
+    });
+    const insights = buildMetricInsights(current, []);
+
+    expect(insights.find(insight => insight.key === 'bpm')?.value).toBe(72);
+    expect(insights.find(insight => insight.key === 'rmssd')?.value).toBeNull();
+    expect(insights.find(insight => insight.key === 'rmssd')?.status).toBe(
+      'Signal insuffisant',
+    );
+  });
+});