fix(fitbit): show the retired card only to an account that had Fitbit

After the Web API turndown every account still saw a Fitbit card that
can no longer connect. The status entry now publishes
retirement.offered: false once the API is gone for an account with no
Fitbit connection, no Fitbit app of its own and no Fitbit data, and the
connections panel leaves the card out. Accounts that had Fitbit keep it
with the retirement notice.

src/components/settings/integrations/shared.tsx

@@ -14,7 +14,7 @@ import type { GoogleHealthBackfillEndedEntry } from "@/lib/google-health/backfil
 import type { ConnectionHealth } from "@/lib/integrations/connection-health";
 import type { MetricFreshnessEntry } from "@/lib/integrations/sync-verdict";
 import { queryKeys } from "@/lib/query-keys";
-import type { FitbitRetirement } from "@/lib/fitbit/retirement";
+import type { PublishedFitbitRetirement } from "@/lib/fitbit/retirement";
 
 export type IntegrationKey =
   | "withings"
@@ -73,7 +73,7 @@ export interface IntegrationStatusViewModel {
   /** Per-metric last-seen timestamps with the server-computed stale flag. */
   metricFreshness?: MetricFreshnessEntry[];
   /** Fitbit: the end of the legacy Web API, resolved on the server. */
-  retirement?: FitbitRetirement;
+  retirement?: PublishedFitbitRetirement;
 }
 
 export interface IntegrationStatusEnvelope {