Names beside inside addresses

Reverse lookups (internal/names, POST /names) put a name beside each
inside address in connections, the log, quota usage, the dashboard's
quotas and the statistics' devices and blocked sources, in the web UI
and hc (--no-names to leave them out). Only inside addresses are looked
up: an inside zone's networks, and private ones outside the external
zones'. Names are cached (names.cache, 10m) and never stored;
names.resolver picks the DNS server.

Also: hc stats top devices listed each device twice; the dashboard's
quotas named the rule's ID twice.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/web/static/assets/style.css

@@ -85,6 +85,7 @@ h1 { font-size: 20px; margin: 0 0 4px; }
 h2 { font-size: 16px; margin: 18px 0 8px; }
 h3 { font-size: 14px; margin: 14px 0 6px; }
 .muted { color: var(--muted); }
+.host-name { font-weight: 600; }
 .small { font-size: 12px; }
 .nowrap { white-space: nowrap; }
 .warn-text { color: var(--warn); }