feat: refresh stale last pickup information

Track the successful member-list check time and refresh stale pickup information
asynchronously after the GUI loads without triggering dormant warnings.

services/lastPickupInfo.js

@@ -0,0 +1,63 @@
+const LAST_PICKUP_INFO_MAX_AGE_MS = 7 * 24 * 60 * 60 * 1000;
+
+function parseTimestamp(value) {
+  if (!value) {
+    return null;
+  }
+  const timestamp = value instanceof Date ? value.getTime() : new Date(value).getTime();
+  return Number.isFinite(timestamp) ? timestamp : null;
+}
+
+function getStaleLastPickupStoreIds(config = [], now = Date.now()) {
+  if (!Array.isArray(config)) {
+    return [];
+  }
+  return config
+    .filter((entry) => {
+      if (!entry?.id || entry.hidden) {
+        return false;
+      }
+      const checkedAt = parseTimestamp(entry.lastPickupCheckedAt);
+      return !checkedAt || now - checkedAt > LAST_PICKUP_INFO_MAX_AGE_MS;
+    })
+    .map((entry) => String(entry.id));
+}
+
+function parseLastFetchTimestamp(value) {
+  if (typeof value === 'string') {
+    return parseTimestamp(value);
+  }
+  if (!Number.isFinite(Number(value))) {
+    return null;
+  }
+  const numericValue = Number(value);
+  return numericValue > 1e12 ? numericValue : numericValue * 1000;
+}
+
+function updateLastPickupInfo(entry, lastFetchValue, checkedAt = new Date()) {
+  if (!entry || typeof entry !== 'object') {
+    return false;
+  }
+  let changed = false;
+  const checkedAtIso = new Date(checkedAt).toISOString();
+  if (entry.lastPickupCheckedAt !== checkedAtIso) {
+    entry.lastPickupCheckedAt = checkedAtIso;
+    changed = true;
+  }
+  const lastFetchTimestamp = parseLastFetchTimestamp(lastFetchValue);
+  if (lastFetchTimestamp !== null) {
+    const lastPickupAt = new Date(lastFetchTimestamp).toISOString();
+    if (entry.lastPickupAt !== lastPickupAt) {
+      entry.lastPickupAt = lastPickupAt;
+      changed = true;
+    }
+  }
+  return changed;
+}
+
+module.exports = {
+  LAST_PICKUP_INFO_MAX_AGE_MS,
+  getStaleLastPickupStoreIds,
+  parseLastFetchTimestamp,
+  updateLastPickupInfo
+};