feat(integrations): list imported cycle days in the details

The details of the Garmin and Oura cards listed measurement types and
workouts only, so cycle days a wearable imported appeared nowhere, and a
bug report could not say whether any had arrived. The status envelope now
carries a `CYCLE_DAYS` entry per cycle-importing source with the newest
day and the count, and the freshness list renders it. It counts as a
sparse type, so a month between periods never reads as a dead pipe.

Refs #1333

src/components/settings/integrations/__tests__/garmin-card.test.tsx

@@ -72,6 +72,25 @@ function connected(keyExpiry: GarminKeyExpiry | null) {
 }
 
 describe("GarminCard on the shared card", () => {
+  it("lists the imported cycle days in the details", () => {
+    const html = render({
+      connected: true,
+      configured: true,
+      health: healthFixture(),
+      keyExpiry: null,
+      metricFreshness: [
+        {
+          type: "CYCLE_DAYS",
+          lastSeenAt: "2026-10-20T12:00:00.000Z",
+          count: 42,
+          stale: false,
+        },
+      ],
+    });
+    expect(html).toContain('data-metric="CYCLE_DAYS"');
+    expect(html).toContain("Cycle days (42)");
+  });
+
   it("shows the key form inside the shared card while not connected", () => {
     const html = render({ connected: false, configured: false, health: null });
     expect(html).toContain('data-slot="integration-card"');

src/components/settings/integrations/metric-freshness-list.tsx

@@ -32,6 +32,8 @@ import { cn } from "@/lib/utils";
 const WORKOUT_TYPE = "WORKOUTS";
 /** The pseudo-type carrying Apple Health medication doses. */
 const MEDICATION_DOSE_TYPE = "MEDICATION_DOSE";
+/** The pseudo-type carrying the cycle days a wearable imported. */
+const CYCLE_DAY_TYPE = "CYCLE_DAYS";
 
 /**
  * Turn an unmapped enum name into something readable. `MEASUREMENT_TYPE_LABEL_KEYS`
@@ -67,7 +69,11 @@ export function MetricFreshnessList<
   if (!entries?.length) return null;
 
   const reference = now ?? new Date();
-  const label = (type: string): string => {
+  const label = (type: string, count?: number): string => {
+    if (type === CYCLE_DAY_TYPE)
+      return count === undefined
+        ? t("settings.integrationFreshness.cycleDays")
+        : t("settings.integrationFreshness.cycleDaysCount", { count });
     if (type === WORKOUT_TYPE)
       return t("settings.integrationFreshness.workouts");
     if (type === MEDICATION_DOSE_TYPE)
@@ -142,7 +148,7 @@ export function MetricFreshnessList<
                       extra && !entry.stale && "text-foreground",
                     )}
                   >
-                    {label(entry.type)}
+                    {label(entry.type, entry.count)}
                   </span>
                 </span>
                 <time