feat(desktop-client): surface account health issues in tray and app icons

Periodically polls runtime snapshot for accounts in expired/revoked/challenge_required states and reflects the count via tray badge, macOS dock badge, and Windows overlay icon so users see authentication problems without opening the app.

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

apps/desktop-client/src/main/tray.ts

@@ -2,7 +2,11 @@ import { nativeImage } from "electron/common";
 import { Menu, Tray, app } from "electron/main";
 import type { Tray as ElectronTray } from "electron/main";
 
+type TrayIconImage = ReturnType<typeof nativeImage.createFromBuffer>;
+
 let tray: ElectronTray | null = null;
+let normalTrayIcon: TrayIconImage | null = null;
+let dangerTrayIcon: TrayIconImage | null = null;
 
 const TRAY_ICON_BASE64 =
   "iVBORw0KGgoAAAANSUhEUgAAABYAAAAWCAYAAADEtGw7AAAAnUlEQVR4nN2UwQmAMAxF360Dee8I" +
@@ -10,23 +14,59 @@ const TRAY_ICON_BASE64 =
   "VvzQufX8EchAEmQ5s2LZjUCThwMTg8E3IymG07PSzotFqoqUHcJZ3akWSTctOYST0cT3hMOiCGte" +
   "2HcjakCIHGmiltDW+eNrU7t/dNF/txaahq+VoZ+VygAAAABJRU5ErkJggg==";
 
-function createTrayIcon() {
+const TRAY_DANGER_ICON_BASE64 =
+  "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";
+
+function createTrayIcon(tone: "normal" | "danger"): TrayIconImage {
+  if (tone === "danger") {
+    if (dangerTrayIcon) {
+      return dangerTrayIcon;
+    }
+
+    const icon = nativeImage.createFromBuffer(Buffer.from(TRAY_DANGER_ICON_BASE64, "base64"));
+    icon.setTemplateImage(false);
+    dangerTrayIcon = icon.isEmpty() ? createTrayIcon("normal") : icon;
+    return dangerTrayIcon;
+  }
+
+  if (normalTrayIcon) {
+    return normalTrayIcon;
+  }
+
   const buffer = Buffer.from(TRAY_ICON_BASE64, "base64");
   const icon = nativeImage.createFromBuffer(buffer);
   if (icon.isEmpty()) {
     return nativeImage.createEmpty();
   }
   icon.setTemplateImage(true);
+  normalTrayIcon = icon;
   return icon;
 }
 
+function formatIssueCount(count: number): string {
+  return count > 99 ? "99+" : String(count);
+}
+
+export function updateTrayIssueIndicator(issueCount: number): void {
+  if (!tray || tray.isDestroyed()) {
+    return;
+  }
+
+  const safeCount = Math.max(0, Math.floor(issueCount));
+  const hasIssues = safeCount > 0;
+
+  tray.setImage(createTrayIcon(hasIssues ? "danger" : "normal"));
+  tray.setTitle(hasIssues ? formatIssueCount(safeCount) : "", { fontType: "monospacedDigit" });
+  tray.setToolTip(hasIssues ? `GEO Rankly Desktop · ${safeCount} 个账号健康问题` : "GEO Rankly Desktop");
+}
+
 export function initTray(onOpen: () => void): ElectronTray {
   if (tray) {
     return tray;
   }
 
-  tray = new Tray(createTrayIcon());
-  tray.setToolTip("GEO Rankly Desktop");
+  tray = new Tray(createTrayIcon("normal"));
+  updateTrayIssueIndicator(0);
   tray.setContextMenu(
     Menu.buildFromTemplate([
       { label: "Open", click: () => onOpen() },