Continue phase 2 device ops and dynamic QR lifecycle

dist/shared/store/heartbeatStore.js

@@ -100,3 +100,63 @@ export function deriveDeviceStatus(input) {
     }
     return "online";
 }
+export function deriveDeviceHealthSummary(input) {
+    const now = Date.now();
+    const lastSeen = Date.parse(input?.last_seen_at || "");
+    const reasons = [];
+    if (!Number.isFinite(lastSeen)) {
+        return {
+            status: "offline",
+            score: 0,
+            age_seconds: null,
+            reasons: ["no_heartbeat"]
+        };
+    }
+    const ageSeconds = Math.max(0, Math.floor((now - lastSeen) / 1000));
+    const networkStrength = typeof input?.network_strength === "number" ? input.network_strength : null;
+    const batteryLevel = typeof input?.battery_level === "number" ? input.battery_level : null;
+    if (ageSeconds > 900) {
+        reasons.push("offline_threshold_exceeded");
+    }
+    else if (ageSeconds > 90) {
+        reasons.push("stale_threshold_exceeded");
+    }
+    if (typeof networkStrength === "number" && networkStrength < 40) {
+        reasons.push("low_signal");
+    }
+    if (typeof batteryLevel === "number" && batteryLevel < 20) {
+        reasons.push("low_battery");
+    }
+    let status = "online";
+    if (reasons.includes("offline_threshold_exceeded")) {
+        status = "offline";
+    }
+    else if (reasons.includes("stale_threshold_exceeded")) {
+        status = "stale";
+    }
+    else if (reasons.includes("low_signal") || reasons.includes("low_battery")) {
+        status = "degraded";
+    }
+    let score = 100;
+    if (ageSeconds > 900) {
+        score -= 80;
+    }
+    else if (ageSeconds > 90) {
+        score -= 35;
+    }
+    else if (ageSeconds > 60) {
+        score -= 10;
+    }
+    if (typeof networkStrength === "number") {
+        score -= Math.max(0, 40 - networkStrength);
+    }
+    if (typeof batteryLevel === "number") {
+        score -= Math.max(0, 20 - batteryLevel);
+    }
+    return {
+        status,
+        score: Math.max(0, Math.min(100, Math.round(score))),
+        age_seconds: ageSeconds,
+        reasons
+    };
+}