feat(dashboard): widget readability — name-per-line, fill graphs, container breakpoints

Address graphical issues raised from the dashboard screenshot:
- No more truncated host names. Hosts-Overview and Host-Agent-Resources put the
  host name on its own line (full, wraps if needed) with its data grouped beneath
  it; ping/dns (.ping-name) and uptime widget names wrap instead of ellipsis.
  Prefer vertical overflow over cramming/truncating a row.
- History graph fills the panel: drop the fixed 0–100 y-axis ceiling (beginAtZero
  + 8% grace) so the lines use the vertical space instead of hugging the bottom;
  axis labels still show real %.
- Container-query breakpoints: the widget body is now a query container, so
  fragments restyle to their OWN panel width. Host-list widgets flow into 2 cols
  ≥520px and 3 cols ≥900px (.host-blocks) — use the width, remove vertical
  deadspace — and collapse to one column when narrow. Mirrored into the share view.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

plugins/host_agent/templates/widget_history.html

@@ -43,7 +43,10 @@
       elements: { point: { radius: 0 } },
       scales: {
         x: { type: "linear", ticks: { callback: function (v) { return fmtTime(v); }, maxTicksLimit: 6, color: "#8a8a92", font: { size: 10 } }, grid: { color: "#30303a" } },
-        y: { beginAtZero: true, max: 100, ticks: { color: "#8a8a92", font: { size: 10 } }, grid: { color: "#30303a" } },
+        // Auto-scale to the data (with a little headroom) so the lines fill the
+        // panel instead of hugging the bottom of a fixed 0–100 axis. Axis labels
+        // still show the real %, so the values stay honest.
+        y: { beginAtZero: true, grace: "8%", ticks: { color: "#8a8a92", font: { size: 10 } }, grid: { color: "#30303a" } },
       },
       plugins: { legend: { labels: { color: "#b8b8b0", boxWidth: 10, font: { size: 11 } } } },
     },

plugins/host_agent/templates/widget_table.html

@@ -1,9 +1,10 @@
-{# host_agent widget — fleet glance: per-host row with a sparkline beside each
-   metric (cpu/mem/disk/load), mirroring the host-page AGENT panel. #}
+{# host_agent widget — fleet glance. Per host: name on its own line (never
+   truncated), then a row of metric cells (cpu/mem/disk/load), each value with a
+   trend sparkline beneath it — the host-page AGENT panel, on the dashboard. #}
 {% from "_macros.html" import metric_style %}
 {% if rows %}
 {% macro metric_cell(label, value, fmt, svg, style="", title="") %}
-<div style="min-width:74px;flex-shrink:0;" title="{{ title }}">
+<div style="min-width:74px;flex:0 0 auto;" title="{{ title }}">
   <div style="font-size:0.66rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:0.03em;">{{ label }}</div>
   <div style="font-weight:600;font-size:0.8rem;font-variant-numeric:tabular-nums;{{ style }}">
     {% if value is not none %}{{ fmt|format(value) }}{% else %}—{% endif %}
@@ -11,27 +12,31 @@
   <div style="line-height:0;height:16px;">{{ svg | safe }}</div>
 </div>
 {% endmacro %}
-<div style="display:grid;gap:0.1rem;">
+<div class="host-blocks">
   {% for r in rows %}
   {% set stale = r.stale %}
-  <div style="display:flex;align-items:center;gap:0.75rem;font-size:0.82rem;padding:0.45rem 0;border-bottom:1px solid var(--border);">
-    <span class="dot {% if stale %}dot-dim{% elif (r.cpu_pct or 0) >= 90 or (r.mem_used_pct or 0) >= 90 or (r.disk_worst or 0) >= 90 %}dot-warn{% else %}dot-up{% endif %}"
-          title="{% if stale %}stale / no recent data{% else %}warns at CPU/memory ≥90% or any disk mount ≥90% (the 'disk /' figure shows root only){% endif %}"></span>
-    {% set name_style = "flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:500;" %}
-    {% if session.user_id %}
-    <a href="/hosts/{{ r.host.id }}" title="{{ r.host.name }}" style="{{ name_style }}">{{ r.host.name }}</a>
-    {% else %}
-    <span title="{{ r.host.name }}" style="{{ name_style }}">{{ r.host.name }}</span>
-    {% endif %}
-    <div style="display:flex;gap:1.1rem;flex-shrink:0;align-items:flex-start;">
+  <div style="padding:0.55rem 0;border-bottom:1px solid var(--border);">
+    {# Line 1 — health dot + full host name (own line) + last seen #}
+    <div style="display:flex;align-items:center;gap:0.5rem;">
+      <span class="dot {% if stale %}dot-dim{% elif (r.cpu_pct or 0) >= 90 or (r.mem_used_pct or 0) >= 90 or (r.disk_worst or 0) >= 90 %}dot-warn{% else %}dot-up{% endif %}"
+            style="flex-shrink:0;"
+            title="{% if stale %}stale / no recent data{% else %}warns at CPU/memory ≥90% or any disk mount ≥90% (the 'disk /' figure shows root only){% endif %}"></span>
+      {% if session.user_id %}
+      <a href="/hosts/{{ r.host.id }}" style="font-weight:600;font-size:0.85rem;overflow-wrap:anywhere;">{{ r.host.name }}</a>
+      {% else %}
+      <span style="font-weight:600;font-size:0.85rem;overflow-wrap:anywhere;">{{ r.host.name }}</span>
+      {% endif %}
+      <span style="margin-left:auto;font-size:0.72rem;color:var(--text-dim);flex-shrink:0;">
+        {{ r.reg.last_seen_at.strftime("%H:%M:%S") if r.reg.last_seen_at else "never" }}
+      </span>
+    </div>
+    {# Line 2 — metric cells with value + trend; wraps instead of truncating #}
+    <div style="display:flex;flex-wrap:wrap;gap:0.4rem 1.1rem;margin-top:0.35rem;padding-left:1.1rem;">
       {{ metric_cell("cpu", r.cpu_pct, "%.0f%%", r.sparks.cpu, metric_style(r.cpu_pct), "Average CPU utilization") }}
       {{ metric_cell("mem", r.mem_used_pct, "%.0f%%", r.sparks.mem, metric_style(r.mem_used_pct), "Memory in use") }}
       {{ metric_cell("disk /", r.disk_root, "%.0f%%", r.sparks.disk, metric_style(r.disk_root), "Root filesystem (/) usage") }}
       {{ metric_cell("load", r.load_1m, "%.2f", r.sparks.load, "", "Load average (1m)") }}
     </div>
-    <span style="min-width:58px;text-align:right;font-size:0.72rem;color:var(--text-dim);flex-shrink:0;">
-      {{ r.reg.last_seen_at.strftime("%H:%M:%S") if r.reg.last_seen_at else "never" }}
-    </span>
   </div>
   {% endfor %}
 </div>