cleanup and refactor

public/js/modules/caldav.js

@@ -1,6 +1,7 @@
 // ── CalDAV Sync ──
 
 import { $, esc, api, getCsrf } from './util.js';
+import { state } from './state.js';
 
 const CAL_ICONS = [
     { id: 'calendar-dots', label: 'calendar' },
@@ -259,10 +260,9 @@ function showSyncNotification(stats) {
     setTimeout(() => { note.style.transition = 'opacity 0.3s'; note.style.opacity = '0'; setTimeout(() => note.remove(), 350); }, 4000);
 }
 
-let bgSyncRunning = false;
 async function backgroundSync() {
-    if (bgSyncRunning) return;
-    bgSyncRunning = true;
+    if (state.bgSyncRunning) return;
+    state.bgSyncRunning = true;
     try {
         const headers = { 'X-CSRF-Token': getCsrf() };
         const [res, relayRes] = await Promise.all([
@@ -277,7 +277,7 @@ async function backgroundSync() {
             showSyncNotification(total);
         }
     } catch {} finally {
-        bgSyncRunning = false;
+        state.bgSyncRunning = false;
     }
 }