Ready-made color tag presets for HTTP/HTTPS access logs

A '+ Preset…' menu in Settings > Filters adds groups of tags for status
codes, methods, probes, bots and TLS/proxy errors (nginx, Apache, Traefik,
Caddy, HAProxy). A regex group named hl colors only that part of a match,
and tags get an optional label shown in place of the pattern.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

web/style.css

@@ -578,6 +578,8 @@ input.switch:disabled { cursor: not-allowed; }
 input.switch:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
 
 .set-section footer { display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; margin-top: 14px; }
+.tag-add { display: flex; flex-wrap: wrap; gap: 8px; }
+.tag-add select.field { width: auto; }
 
 .seg { display: inline-flex; padding: 3px; gap: 3px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; }
 .seg button {