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/Greeting.tsx

@@ -27,9 +27,13 @@ function useFullName(username: string | null): string | null {
     if (!username) return;
     let live = true;
     const localPart = username.split('@')[0];
-    jmapQueryAndGet('x:Account', getAccountId('x:Account'), { filter: { name: localPart } }, ['description', 'emailAddress'])
+    jmapQueryAndGet('x:Account', getAccountId('x:Account'), { filter: { name: localPart } }, [
+      'description',
+      'emailAddress',
+    ])
       .then((responses) => {
-        const list = (responses[1]?.[1] as { list?: { description?: string | null; emailAddress?: string }[] }).list ?? [];
+        const list =
+          (responses[1]?.[1] as { list?: { description?: string | null; emailAddress?: string }[] }).list ?? [];
         const own = list.find((a) => a.emailAddress?.toLowerCase() === username.toLowerCase());
         const name = own?.description?.trim();
         if (live && name) setFullName(name);