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/AiPlatformsView.vue

@@ -11,7 +11,7 @@ import { computed, ref } from "vue";
 
 import { useDesktopRuntime } from "../composables/useDesktopRuntime";
 import { showClientActionError } from "../lib/client-errors";
-import { formatDateTime } from "../lib/formatters";
+import { formatDateTime, formatRelativeTime } from "../lib/formatters";
 import { desktopMonitoringMediaCatalog } from "../lib/media-catalog";
 import type { RuntimeAccount } from "../types";
 
@@ -52,15 +52,19 @@ function authLabel(account: AccountRow | null) {
     return "未绑定";
   }
 
-  switch (account.health) {
-    case "live":
+  switch (account.authState) {
+    case "active":
       return "授权正常";
-    case "captcha":
-      return "待处理";
+    case "challenge_required":
+      return "需人工验证";
     case "expired":
       return "授权过期";
+    case "expiring_soon":
+      return account.probeState === "network_error" ? "最近校验失败" : "待重新校验";
+    case "revoked":
+      return "已停用";
     default:
-      return "风险观察";
+      return account.probeState === "probing" ? "校验中" : "待校验";
   }
 }
 
@@ -69,18 +73,38 @@ function authColor(account: AccountRow | null) {
     return "default";
   }
 
-  switch (account.health) {
-    case "live":
+  switch (account.authState) {
+    case "active":
       return "success";
-    case "captcha":
+    case "challenge_required":
       return "warning";
     case "expired":
+    case "revoked":
       return "error";
+    case "expiring_soon":
+      return account.probeState === "network_error" ? "warning" : "default";
     default:
       return "default";
   }
 }
 
+function verificationLabel(account: AccountRow): string {
+  if (account.lastVerifiedAt) {
+    return `${formatRelativeTime(account.lastVerifiedAt)}校验通过`;
+  }
+  if (account.probeState === "probing") {
+    return "正在执行首轮校验";
+  }
+  return "尚未完成校验";
+}
+
+function nextProbeLabel(account: AccountRow): string {
+  if (!account.nextProbeAt) {
+    return "未排程";
+  }
+  return formatRelativeTime(account.nextProbeAt);
+}
+
 function sessionLabel(account: AccountRow): string {
   switch (account.sessionState) {
     case "hot":
@@ -243,6 +267,14 @@ async function unbindPlatform(account: AccountRow) {
                 <span class="info-label">最近同步</span>
                 <span class="info-value">{{ formatDateTime(platform.account.lastSyncAt) }}</span>
               </div>
+              <div class="info-row">
+                <span class="info-label">校验状态</span>
+                <span class="info-value">{{ verificationLabel(platform.account) }}</span>
+              </div>
+              <div class="info-row">
+                <span class="info-label">下次巡检</span>
+                <span class="info-value">{{ nextProbeLabel(platform.account) }}</span>
+              </div>
             </div>
 
             <div class="card-footer">