speed up vm trace pages

components/views/index.templ

@@ -55,6 +55,9 @@ templ Index(info BuildInfo) {
 						<p class="mt-2 text-sm text-slate-600">
 							vCTP is a vSphere Chargeback Tracking Platform.
 						</p>
+						<p class="mt-2 text-sm text-slate-600">
+							Use fast vCenter totals views (Daily Aggregated and Hourly Detail 45d) and VM Trace views (Hourly Detail and Daily Aggregated) to move between long-range trends and granular timelines.
+						</p>
 					</div>
 						<div class="web2-card">
 							<h2 class="text-lg font-semibold mb-2">Snapshots and Reports</h2>
@@ -64,6 +67,8 @@ templ Index(info BuildInfo) {
 								<p><strong>Daily tracks:</strong> <code class="web2-code">SamplesPresent</code>, <code class="web2-code">TotalSamples</code>, <code class="web2-code">AvgIsPresent</code>, <code class="web2-code">AvgVcpuCount</code>, <code class="web2-code">AvgRamGB</code>, <code class="web2-code">AvgProvisionedDisk</code>, <code class="web2-code">PoolTinPct</code>, <code class="web2-code">PoolBronzePct</code>, <code class="web2-code">PoolSilverPct</code>, <code class="web2-code">PoolGoldPct</code>, plus chargeback totals columns <code class="web2-code">Tin</code>, <code class="web2-code">Bronze</code>, <code class="web2-code">Silver</code>, <code class="web2-code">Gold</code>.</p>
 								<p><strong>Monthly tracks:</strong> the same daily aggregate fields, with monthly values weighted by per-day sample volume so partial-day VMs and config changes stay proportional.</p>
 								<p>Snapshots are registered in <code class="web2-code">snapshot_registry</code> so regeneration via <code class="web2-code">/api/snapshots/aggregate</code> can locate the correct tables (fallback scanning is also supported).</p>
+								<p>vCenter totals pages are accelerated by compact cache tables: <code class="web2-code">vcenter_latest_totals</code> and <code class="web2-code">vcenter_aggregate_totals</code>.</p>
+								<p>VM Trace daily mode uses the <code class="web2-code">vm_daily_rollup</code> cache when available, and falls back to daily summary tables if needed.</p>
 								<p>Reports (XLSX with totals/charts) are generated automatically after hourly, daily, and monthly jobs and written to a reports directory.</p>
 								<p>Hourly totals are interval-based: each row represents <code class="web2-code">[HH:00, HH+1:00)</code> and uses the first snapshot at or after the hour end (including cross-day snapshots) to prorate VM presence.</p>
 								<p>Monthly aggregation reports include a Daily Totals sheet with full-day interval labels (YYYY-MM-DD to YYYY-MM-DD) and prorated totals.</p>