Dashboard: every number leads somewhere, real counts, and new charts

- Cards and charts link to the page they're about: pending messages to the
  queue, bans to blocked IPs, report warnings to the reports, and so on,
  shown only to viewers who may open that page.
- A one-line status under the greeting: what needs a look (failed tasks,
  messages retrying, recipients given up on) or, when nothing does, what's
  there. Each phrase is a link.
- Counts from the server's own objects stand in for live metrics it can't
  report, and a live number with no source reads as unknown, not zero.
- Who uses the space: a treemap of people sized by storage, colored by how
  near their quota they are, each tile opening the account.
- Where mail is waiting: queued recipients by destination, split into
  waiting, retrying and given up, each row opening the filtered queue.
- The weekly rhythm: messages by hour and weekday, shown once metric
  history exists.
- Dashboard tabs are titled by their label.

src/features/dashboard/components/DashboardChart.tsx

@@ -1,5 +1,6 @@
 /*
  * SPDX-FileCopyrightText: 2020 Stalwart Labs LLC <[email protected]>
+ * SPDX-FileCopyrightText: 2026 Coffey Labs
  *
  * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-SEL
  */
@@ -51,6 +52,7 @@ function ChartSizedContainer({
   );
 }
 import { Info } from 'lucide-react';
+import { GoLink } from './GoLink';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Tooltip as UiTooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip';
 import { getChartColor } from '@/components/ui/chart';
@@ -242,6 +244,7 @@ export function DashboardChart({ chart, historySamples, historyWindow, period }:
               </UiTooltip>
             </TooltipProvider>
           )}
+          <GoLink metrics={chart.series.flatMap((x) => x.metrics)} />
         </div>
       </CardHeader>
       <CardContent>