refactor(desktop): narrow home health board to expired/revoked accounts

Home 看板只保留已过期或已停用的账号，问题计数改用阻塞态 authState；新增 formatVerifiedAtLabel，统一校验通过时间的展示粒度。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/desktop-client/src/main/runtime-snapshot.ts

@@ -114,6 +114,9 @@ function createLiveRuntimeSnapshot(controller: ReturnType<typeof getRuntimeContr
     acc[item.health] = (acc[item.health] ?? 0) + 1;
     return acc;
   }, {});
+  const blockingAccountCount = accounts.filter((item) =>
+    ["expired", "revoked", "challenge_required"].includes(item.authState),
+  ).length;
 
   return {
     generatedAt: now,
@@ -138,7 +141,7 @@ function createLiveRuntimeSnapshot(controller: ReturnType<typeof getRuntimeContr
       queuedTasks: tasks.filter((item) => item.status === "queued").length,
       issuesOpen:
         tasks.filter((item) => ["unknown", "failed"].includes(item.status)).length
-        + accounts.filter((item) => item.health !== "live").length,
+        + blockingAccountCount,
       healthCounts,
     },
     clients,