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>

steward/templates/base.html

@@ -163,7 +163,7 @@ textarea { resize: vertical; }
 .ping-row { display:flex; align-items:center; gap:1rem; padding:0.45rem 0; border-bottom:1px solid var(--border); }
 .ping-row:last-child { border-bottom:none; }
 .ping-meta { min-width:120px; max-width:180px; flex-shrink:1; overflow:hidden; }
-.ping-name { font-size:0.875rem; font-weight:500; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; display:block; }
+.ping-name { font-size:0.875rem; font-weight:500; display:block; overflow-wrap:anywhere; }
 a.ping-name:hover { text-decoration:underline; }
 /* Dashboard widget grid — Gridstack-rendered. Static (positioned but inert) in
    view mode; the dashboard itself becomes the edit surface when Edit is toggled,
@@ -174,6 +174,14 @@ a.ping-name:hover { text-decoration:underline; }
   padding:0.8rem 1rem; display:flex; flex-direction:column; overflow:hidden;
 }
 .grid-stack-item-content .dash-cell-body { flex:1; min-height:0; overflow:auto; }
+/* The widget body is a query container, so fragments can restyle to their OWN
+   panel width (not the viewport) — widgets adapt as you resize them. */
+.dash-cell-body { container-type:inline-size; }
+/* Host-list widgets flow into columns as the panel widens: use the width, drop
+   the vertical deadspace; stay single-column (and untruncated) when narrow. */
+.host-blocks { display:grid; grid-template-columns:1fr; gap:0 1.5rem; }
+@container (min-width:520px) { .host-blocks { grid-template-columns:1fr 1fr; } }
+@container (min-width:900px) { .host-blocks { grid-template-columns:1fr 1fr 1fr; } }
 .panel-chrome { display:none; }
 .panel-drag { cursor:grab; color:var(--text-dim); user-select:none; }
 .panel-drag:active { cursor:grabbing; }

steward/templates/dashboard/share_view.html

@@ -44,7 +44,7 @@
     .ping-row { display:flex; align-items:center; gap:1rem; padding:0.45rem 0; border-bottom:1px solid var(--border); }
     .ping-row:last-child { border-bottom:none; }
     .ping-meta { min-width:120px; max-width:180px; flex-shrink:1; overflow:hidden; }
-    .ping-name { font-size:0.875rem; font-weight:500; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; display:block; }
+    .ping-name { font-size:0.875rem; font-weight:500; display:block; overflow-wrap:anywhere; }
     .ping-addr { display:block; color:var(--text-muted); font-size:0.75rem; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
     .ping-pills { display:flex; gap:2px; flex:1; min-width:0; overflow:hidden; align-items:center; }
     .pill { display:inline-block; width:7px; height:22px; border-radius:2px; }
@@ -59,6 +59,10 @@
     .dash-grid { display:grid; grid-template-columns:repeat(12,1fr); grid-auto-rows:70px; gap:1rem; }
     .dash-grid > .dash-cell { margin-bottom:0; min-width:0; overflow:hidden; display:flex; flex-direction:column; }
     .dash-cell .dash-cell-body { flex:1; min-height:0; overflow:auto; }
+    .dash-cell-body { container-type:inline-size; }
+    .host-blocks { display:grid; grid-template-columns:1fr; gap:0 1.5rem; }
+    @container (min-width:520px) { .host-blocks { grid-template-columns:1fr 1fr; } }
+    @container (min-width:900px) { .host-blocks { grid-template-columns:1fr 1fr 1fr; } }
     @media (max-width:820px) {
       .dash-grid { grid-template-columns:1fr; grid-auto-rows:auto; }
       .dash-grid > .dash-cell { grid-column:1 / -1 !important; grid-row:auto !important; }

steward/templates/hosts/overview_widget.html

@@ -1,33 +1,38 @@
-{# Unified Hosts widget — monitor status + agent glance per host, links to the hub. #}
+{# Unified Hosts widget — monitor status + agent glance per host, links to the hub.
+   Name sits on its own line (never truncated); its data wraps beneath it, grouped
+   under the host. Prefer vertical growth over cramming a row. #}
 {% from "_macros.html" import metric_style %}
 {% if hosts %}
-<div style="display:grid;gap:0.1rem;">
+<div class="host-blocks">
   {% for host in hosts %}
   {% set ping = latest_pings.get(host.id) %}
   {% set dns = latest_dns.get(host.id) %}
   {% set ut = uptime.get(host.id, {}) %}
   {% set a = agent.get(host.name, {}) %}
   {% set down = host.ping_enabled and ping and ping.status.value != 'up' %}
-  <div style="display:flex;align-items:center;gap:0.6rem;font-size:0.82rem;padding:0.3rem 0;border-bottom:1px solid var(--border);">
-    <span class="dot {% if down %}dot-down{% elif host.ping_enabled and ping %}dot-up{% else %}dot-dim{% endif %}"
-          title="{% if not host.ping_enabled %}ping off{% elif ping %}{{ ping.status.value }}{% else %}no data{% 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/{{ host.id }}" title="{{ host.name }}" style="{{ name_style }}">{{ host.name }}</a>
-    {% else %}
-    <span title="{{ host.name }}" style="{{ name_style }}">{{ host.name }}</span>
-    {% endif %}
-    {% set spark = cpu_sparks.get(host.name) %}
-    {% if spark %}<span title="CPU — last hour" style="flex-shrink:0;line-height:0;opacity:0.85;">{{ spark | safe }}</span>{% endif %}
-    <span style="display:flex;gap:0.75rem;font-variant-numeric:tabular-nums;color:var(--text-muted);font-size:0.75rem;flex-shrink:0;">
-      {# Monitors #}
+  {% set spark = cpu_sparks.get(host.name) %}
+  <div style="padding:0.5rem 0;border-bottom:1px solid var(--border);">
+    {# Line 1 — status dot + full host name (own line) + cpu trend #}
+    <div style="display:flex;align-items:center;gap:0.5rem;">
+      <span class="dot {% if down %}dot-down{% elif host.ping_enabled and ping %}dot-up{% else %}dot-dim{% endif %}"
+            style="flex-shrink:0;"
+            title="{% if not host.ping_enabled %}ping off{% elif ping %}{{ ping.status.value }}{% else %}no data{% endif %}"></span>
+      {% if session.user_id %}
+      <a href="/hosts/{{ host.id }}" style="font-weight:600;font-size:0.85rem;overflow-wrap:anywhere;">{{ host.name }}</a>
+      {% else %}
+      <span style="font-weight:600;font-size:0.85rem;overflow-wrap:anywhere;">{{ host.name }}</span>
+      {% endif %}
+      {% if spark %}<span title="CPU — last hour" style="margin-left:auto;line-height:0;opacity:0.85;flex-shrink:0;">{{ spark | safe }}</span>{% endif %}
+    </div>
+    {# Line 2 — monitors + agent metrics; wraps instead of truncating #}
+    <div style="display:flex;flex-wrap:wrap;gap:0.25rem 0.9rem;margin-top:0.25rem;padding-left:1.1rem;
+                font-variant-numeric:tabular-nums;color:var(--text-muted);font-size:0.75rem;">
       {% if host.ping_enabled and ping and ping.response_time_ms is not none %}
       <span title="Ping latency"><span style="color:var(--text-dim);">ping</span> {{ "%.0f"|format(ping.response_time_ms) }}ms</span>
       {% endif %}
       {% if ut.get('24h') is not none %}
       <span title="Uptime 24h"><span style="color:var(--text-dim);">24h</span> {{ "%.1f"|format(ut['24h']) }}%</span>
       {% endif %}
-      {# Agent glance — failing metric coloured amber/red (≥80/≥90) #}
       {% if a %}
       {% if a.get('cpu_pct') is not none %}<span title="CPU" style="{{ metric_style(a.cpu_pct) }}"><span style="color:var(--text-dim);">cpu</span> {{ "%.0f"|format(a.cpu_pct) }}%</span>{% endif %}
       {% if a.get('mem_used_pct') is not none %}<span title="Memory" style="{{ metric_style(a.mem_used_pct) }}"><span style="color:var(--text-dim);">mem</span> {{ "%.0f"|format(a.mem_used_pct) }}%</span>{% endif %}
@@ -36,7 +41,7 @@
       {% else %}
       <span style="color:var(--text-dim);" title="No agent reporting">no agent</span>
       {% endif %}
-    </span>
+    </div>
   </div>
   {% endfor %}
 </div>

steward/templates/hosts/uptime_widget.html

@@ -17,9 +17,9 @@
   <div style="display:grid;grid-template-columns:1fr 52px 52px 52px;gap:0.35rem;align-items:center;padding:0.15rem 0;font-size:0.82rem;">
     {% if session.user_id %}
     <a href="/hosts/{{ host.id }}" title="{{ host.name }}"
-       style="white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:inherit;text-decoration:none;">{{ host.name }}</a>
+       style="overflow-wrap:anywhere;color:inherit;text-decoration:none;">{{ host.name }}</a>
     {% else %}
-    <span style="white-space:nowrap;overflow:hidden;text-overflow:ellipsis;" title="{{ host.name }}">{{ host.name }}</span>
+    <span style="overflow-wrap:anywhere;" title="{{ host.name }}">{{ host.name }}</span>
     {% endif %}
     {% for window in ["24h", "7d", "30d"] %}
     {% set pct = ut.get(window) %}