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>

tests/test_style_tokens.py

@@ -22,7 +22,7 @@ _USED = re.compile(r"var\(\s*(--[\w-]+)")
 # string -- but not an HTML attribute's value (href="#abc" is a link to an id).
 _HEX = re.compile(r"""(?:[:(,]\s*|(?<![\w-]=)['"])#(?:[0-9a-fA-F]{8}|[0-9a-fA-F]{6}|[0-9a-fA-F]{3})(?![0-9a-zA-Z_-])""")
 
-HEX_CEILING = 47  # 75 at #5092, 58 at #5095, 56 at #5121, 54 at #5122, 47 with Ansible runs on tokens (#5125); only lower it
+HEX_CEILING = 0  # 75 at #5092, 58 at #5095, 56 at #5121, 54 at #5122, 47 at #5125, 0 with the charts on tokens (#5126)
 
 
 def _sheets():
@@ -45,11 +45,17 @@ def hex_colours(text: str) -> list[str]:
     return _HEX.findall(_COMMENTS.sub("", text))
 
 
+def heavy_weights(text: str) -> list[str]:
+    """Weights past the house pair (400, 500), outside comments."""
+    return re.findall(r"font-weight\s*:\s*(?:[6-9]00|bold)", _COMMENTS.sub("", text))
+
+
 def test_the_guards_can_fail():
     assert undefined_vars([":root { --a: 1; } .x { color: var(--a); background: var(--b); }"]) == {"--b"}
     page = '<div style="color:#fff;background: rgb(0 0 0)" hx-target="#add-form"></div><script>c = "#4aa86a"</script>'
     assert len(hex_colours(page)) == 2
     assert hex_colours("{# color:#fff #}<a href=\"#abc\">") == []
+    assert heavy_weights('<b style="font-weight: 600">{# font-weight:700 #}</b>') == ["font-weight: 600"]
 
 
 def test_every_css_variable_used_is_defined():
@@ -63,6 +69,12 @@ def test_the_base_stylesheet_states_no_colour_or_heavy_weight_of_its_own():
     assert not re.findall(r"font-weight\s*:\s*(?:[6-9]00|bold)", css)
 
 
+def test_templates_use_the_two_house_weights():
+    """The house style has two weights, 400 and 500 (design system 1)."""
+    heavy = {p.name: len(found) for p in _templates() if (found := heavy_weights(p.read_text()))}
+    assert not heavy, heavy
+
+
 def test_hex_colours_in_templates_only_go_down():
     count = sum(len(hex_colours(p.read_text())) for p in _templates())
     assert count <= HEX_CEILING, (