Make onboarding tour install-wide instead of per-browser

Persist onboardingCompleted flag server-side via /api/v1/config so the
tour only auto-starts once per DashCaddy installation, not on every
new browser that connects.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

status/js/globals.js

@@ -35,9 +35,10 @@ const SITE = {
   configurationType: (_cachedCfg && _cachedCfg.configurationType) || 'homelab',
   domain: (_cachedCfg && _cachedCfg.domain) || '',
   defaults: (_cachedCfg && _cachedCfg.defaults) || {},
-  routingMode: (_cachedCfg && _cachedCfg.routingMode) || 'subdomain'
+  routingMode: (_cachedCfg && _cachedCfg.routingMode) || 'subdomain',
+  onboardingCompleted: false
 };
-(async function loadSiteConfig() {
+window.__dashcaddySiteConfigLoaded = (async function loadSiteConfig() {
   try {
     const r = await fetch('/api/v1/config');
     if (r.ok) {
@@ -56,6 +57,7 @@ const SITE = {
       if (c.domain) SITE.domain = c.domain;
       if (c.defaults) SITE.defaults = c.defaults;
       if (c.routingMode) SITE.routingMode = c.routingMode;
+      SITE.onboardingCompleted = c.onboardingCompleted === true;
       // Cache only non-sensitive display config (TLD, domain, routing mode)
       // DNS IPs and server topology are NOT cached — fetched from API each load
       localStorage.setItem('dashcaddy_site_config', JSON.stringify({