feat: merge Dashboard + Server Status (careful surgical approach)

- Added history chart to dashboard: fetches stats/server API, renders
  24-hour CPU/RAM/Disk chart with Chart.js lazy-loaded
- setTimeout properly INSIDE function before closing brace
- Removed ONLY serverStatus() function body (2521 chars), kept initStatsChart
- pages object redirects server-status → dashboard
- Removed server-status from admin sidebar nav
- All 26 functions intact, backticks balanced, accounts/packages/DNS all kept

panel/admin/index.php

@@ -38,10 +38,6 @@ require_once dirname(__DIR__) . '/_branding.php';
           <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="3" y="3" width="7" height="7"/><rect x="14" y="3" width="7" height="7"/><rect x="3" y="14" width="7" height="7"/><rect x="14" y="14" width="7" height="7"/></svg>
           Dashboard
         </a>
-        <a href="#" class="sidebar-link" data-page="server-status">
-          <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="2" y="2" width="20" height="8" rx="2"/><rect x="2" y="14" width="20" height="8" rx="2"/><line x1="6" y1="6" x2="6.01" y2="6"/><line x1="6" y1="18" x2="6.01" y2="18"/></svg>
-          Server Status
-        </a>
       </div>
 
       <div class="sidebar-section">