Add experimental metrics insights, comparisons, and scope filters

src/lib/ui/components/metrics/MetricsTables.svelte

@@ -92,14 +92,14 @@
         <div class="table-wrap" role="region" aria-label="Server utilization table" tabindex="0"><table>
             <thead><tr>{#each serverColumns as column}<th scope="col" aria-sort={serverSort === column.key ? serverDirection === 'asc' ? 'ascending' : 'descending' : undefined}><button type="button" onclick={() => sortServer(column.key)}>{column.label}<span aria-hidden="true">{serverSort === column.key ? serverDirection === 'asc' ? '↑' : '↓' : '↕'}</span></button></th>{/each}</tr></thead>
             <tbody>{#each serverRows as server (server.server)}<tr>
-                <th scope="row"><ServerIdentity name={server.server} /><small class="server-id">{server.server}</small></th>
+                <th scope="row"><ServerIdentity name={server.server} /><small class="server-id">{server.server}</small>{#if server.currentRegistered}<a class="current-server" href={`/servers/${encodeURIComponent(server.server)}`}>Open current server <span aria-hidden="true">↗</span></a>{/if}</th>
                 <td>{metricPercent(server.active, server.observed)}<small>{metricDuration(server.active)} of {metricDuration(server.observed)} known</small></td>
                 <td>{metricPercent(server.idle, server.observed)}<small>{metricDuration(server.idle)} idle</small></td>
                 <td>{metricDuration(server.observed)}</td><td>{metricDuration(server.unknown)}</td>
             </tr>{/each}</tbody>
         </table></div>
     {:else}<EmptyState title="No servers match this search" description="Try a friendly map name or technical server ID.">{#snippet actions()}<Button size="sm" onclick={() => updateContext({ serverQ: '' })}>Clear server search</Button>{/snippet}</EmptyState>{/if}
-    <div class="footer"><span>{serverRows.length} of {servers.length} historical server names</span><span>A dash means no known time. Names may include more than one registration.</span></div>
+    <div class="footer"><span>{serverRows.length} of {servers.length} historical server names</span><span>Names may include multiple registrations. Links open the current registration, which may differ from historical instances.</span></div>
 </section>
 
 <style>
@@ -123,6 +123,9 @@
     tbody tr:hover { background: color-mix(in oklab, var(--surface-raised) 35%, transparent); }
     small { display: block; margin-top: 4px; font-size: 11px; font-weight: normal; line-height: 1.5; color: var(--text-tertiary); }
     .server-id { font-family: var(--font-mono); font-size: 10px; }
+    .current-server { display: inline-block; margin-top: 6px; font-size: 11px; color: var(--accent-primary-hover); text-decoration: none; }
+    .current-server:hover { text-decoration: underline; }
+    .current-server:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 3px; }
     .unavailable { color: var(--text-secondary); }
     .player-hours { min-width: 120px; }
     .comparison { height: 3px; width: 90px; margin: 8px 0 0 auto; background: var(--surface-raised); border-radius: 3px; }