feat(desktop): add monitor scheduler, Playwright CDP layer, and account health

Move monitor-task scheduling authority onto the client with a durable
file-backed queue that survives restart, drops stale cross-day tasks,
enforces per-platform serialism, and adapts global concurrency from
Electron process metrics. Publish tasks keep their existing FIFO.

Add a hidden Playwright CDP manager that attaches to Electron Chromium
on account session partitions, lets adapters opt into `executionMode:
"playwright"`, and leaves the existing hidden WebContentsView path in
place for current adapters.

Introduce an account-health subsystem with silent probes, projected
health/auth states, and IPC invalidation events so the renderer can
show accurate auth/probe status and verification timestamps.

Server-side, derive and forward title/business_date/scheduler_group_key/
question_text metadata on desktop task events so the local scheduler
can defer same-question fan-out before leasing.

apps/desktop-client/src/renderer/views/AccountsView.vue

@@ -6,7 +6,7 @@ import StatusBadge from "../components/StatusBadge.vue";
 import SurfaceCard from "../components/SurfaceCard.vue";
 import { useDesktopRuntime } from "../composables/useDesktopRuntime";
 import { showClientActionError } from "../lib/client-errors";
-import { formatDateTime, titleCaseToken } from "../lib/formatters";
+import { formatDateTime, formatRelativeTime, titleCaseToken } from "../lib/formatters";
 import { desktopPublishMediaCatalog } from "../lib/media-catalog";
 import type { RuntimeAccount } from "../types";
 
@@ -70,12 +70,13 @@ function platformMeta(platform: string) {
 }
 
 function authState(account: AccountRow): AccountAuthState {
-  switch (account.health) {
-    case "live":
+  switch (account.authState) {
+    case "active":
       return "authorized";
     case "expired":
+    case "revoked":
       return "expired";
-    case "captcha":
+    case "challenge_required":
       return "attention";
     default:
       return "risk";
@@ -89,9 +90,9 @@ function authStateLabel(account: AccountRow): string {
     case "expired":
       return "授权过期";
     case "attention":
-      return "待补登";
+      return "需人工验证";
     default:
-      return "风险观察";
+      return account.probeState === "network_error" ? "最近校验失败" : "待重新校验";
   }
 }
 
@@ -123,6 +124,16 @@ function sessionStateLabel(account: AccountRow): string {
   }
 }
 
+function verificationTimeLabel(account: AccountRow): string {
+  if (account.lastVerifiedAt) {
+    return `${formatRelativeTime(account.lastVerifiedAt)}校验通过`;
+  }
+  if (account.probeState === "probing") {
+    return "正在校验";
+  }
+  return "尚未校验";
+}
+
 const filteredAccounts = computed(() => {
   const keyword = searchQuery.value.trim().toLowerCase();
 
@@ -382,7 +393,7 @@ const tableColumns = [
             </template>
             
             <template v-else-if="column.key === 'status'">
-               <a-tag :color="record.health === 'live' ? 'success' : record.health === 'expired' ? 'error' : record.health === 'captcha' ? 'warning' : 'default'" style="border-radius: 999px; font-weight: 600; padding: 2px 10px;">
+               <a-tag :color="authState(record) === 'authorized' ? 'success' : authState(record) === 'expired' ? 'error' : authState(record) === 'attention' ? 'warning' : 'default'" style="border-radius: 999px; font-weight: 600; padding: 2px 10px;">
                  {{ authStateLabel(record) }}
                </a-tag>
             </template>
@@ -399,8 +410,8 @@ const tableColumns = [
             <template v-else-if="column.key === 'syncTime'">
                <div class="cell-primary-secondary">
                  <div class="info-stack">
-                   <span class="title">{{ formatDateTime(record.lastSyncAt) }}</span>
-                   <span class="subtitle">{{ record.partition }}</span>
+                   <span class="title">{{ record.lastVerifiedAt ? formatDateTime(record.lastVerifiedAt) : formatDateTime(record.lastSyncAt) }}</span>
+                   <span class="subtitle">{{ verificationTimeLabel(record) }} · {{ record.partition }}</span>
                  </div>
                </div>
             </template>