feat(plugins): Traefik problems first, UniFi/SNMP/fleet on shared shapes, audit names its entities, templates on tokens (#5126)

Traefik: routers are graded from their latest scrape (router_state: crit on
any real 5xx share, warn on p95 past the latency critical cutoff or a high
4xx share). Failing and slow routers lead as cards that say why; healthy
ones fold into one table that stays open or shut across polls. Proxy
counts are stat tiles; certificates are graded by Settings -> Thresholds
(tls_days).

UniFi: WAN health is a stat strip (latency graded by the thresholds),
devices carry status dots, event categories and firewall actions are
badges, the alarm count reuses .count-badge (renamed from .nav-count).
SNMP: each device wears a status badge and its readings are stat tiles.

Agent fleet: the table comes first, with a Status column (Reporting /
Silent / Never reported, by the host page's stale_after_seconds), silent
agents first, hosts linked, last seen as |ago.

Audit: entries name their entity (one query per type, steward/audit/
service.py) and link it; something deleted since keeps the name its entry
recorded and says "(deleted)".

Tokens: charts read colours through chart-colors.js (stewardColor resolves
a token to the rgb the browser computed; Chart.js defaults take the page's
text and border colours), so host, history, Traefik and SNMP charts drop
their hex. Template hex colours reach 0 (HEX_CEILING = 0), the last rgba
pills go, and heavy weights (600/700/bold, 60 of them) become 500, the
house pair being 400/500; a guard keeps templates there.

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

steward/templates/ansible/_playbook_vars.html

@@ -24,7 +24,7 @@
 </label>
 {% endif %}
 {% if variables %}
-<div style="margin:0.5rem 0 0.25rem;font-size:0.82rem;color:var(--text-muted);font-weight:600;">
+<div style="margin:0.5rem 0 0.25rem;font-size:0.82rem;color:var(--text-muted);font-weight:500;">
   Playbook variables
 </div>
 <p style="color:var(--text-dim);font-size:0.76rem;margin:0 0 0.6rem;">

steward/templates/ansible/schedules.html

@@ -42,7 +42,7 @@
         <span style="color:var(--red);" title="{{ s.last_error }}">launch error</span>
       {% elif row.last_run %}
         {% set sc = {"queued":"var(--text-dim)","running":"var(--yellow)","success":"var(--green)","failed":"var(--red)","interrupted":"var(--orange)","cancelled":"var(--orange)"}.get(row.last_run.status.value, "var(--text-muted)") %}
-        <a href="/ansible/runs/{{ row.last_run.id }}" style="color:{{ sc }};font-weight:600;">{{ row.last_run.status.value }}</a>
+        <a href="/ansible/runs/{{ row.last_run.id }}" style="color:{{ sc }};font-weight:500;">{{ row.last_run.status.value }}</a>
         <span style="color:var(--text-dim);">· {{ s.last_run_at.strftime("%m-%d %H:%M") }}</span>
       {% else %}
         <span style="color:var(--text-dim);">never</span>