feat(dashboard): Monitors widget carries uptime; Uptime / SLA retired (#5250)

The Monitors widget opens with a verdict ("1 of 5 monitors down."), then one
row per monitor under a single header: latency and uptime over 24h, 7d and
30d, down monitors first with why and since when, the name linking to the
monitor. Counts follow the type filter. Problems always show; the limit
trims only the healthy rest ("+N more up").

Uptime / SLA (uptime_summary) repeated those numbers per host; migration
0033 moves dashboards onto Monitors. Shared widget styles (.w-verdict,
.w-table, .w-sub, .w-more) carry the widget-shape ruling for the widgets
that follow.

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

steward/core/widgets.py

@@ -18,7 +18,7 @@ WIDGET_REGISTRY: dict[str, dict] = {
     "monitors": {
         "key": "monitors",
         "label": "Monitors",
-        "description": "Uptime checks of every type — ping, DNS, and HTTP — with up/down status and latency",
+        "description": "Every uptime check, problems first: latency and uptime over 24h, 7d and 30d",
         "hx_url": "/monitors/widget",
         "detail_url": "/monitors/",
         "plugin": None,
@@ -80,18 +80,6 @@ WIDGET_REGISTRY: dict[str, dict] = {
         "poll": True,
         "params": [],
     },
-    "uptime_summary": {
-        "key": "uptime_summary",
-        "label": "Uptime / SLA",
-        "description": "Per-host rolling uptime % for 24h, 7d, and 30d windows",
-        "hx_url": "/hosts/uptime/widget",
-        "detail_url": "/hosts/uptime",
-        "plugin": None,
-        "poll": True,
-        # Uptime moves slowly and reads 30 days of checks: every 5 minutes, not every poll.
-        "poll_seconds": 300,
-        "params": [],
-    },
     "traefik_routers": {
         "key": "traefik_routers",
         "label": "Traefik — Routers",
@@ -278,6 +266,7 @@ WIDGET_REGISTRY: dict[str, dict] = {
 RETIRED = {
     "host_resources": "hosts_overview",   # Hosts — Overview carries cpu/mem/disk/load per host
     "unifi_devices": "unifi_overview",    # UniFi — Overview lists the offline devices
+    "uptime_summary": "monitors",         # Monitors shows 24h/7d/30d uptime per monitor (#5250)
 }
 
 # The recommended dashboard (#5213): what needs attention first, then the
@@ -291,7 +280,6 @@ RECOMMENDED: list[tuple[str, int, int, dict]] = [
     ("monitors", 6, 7, {"show_down_only": "no", "limit": 10}),
     ("docker_containers", 6, 6, {}),
     ("docker_resources", 6, 6, {"limit": 10}),
-    ("uptime_summary", 6, 5, {}),
     ("traefik_routers", 6, 5, {}),
     ("unifi_overview", 6, 4, {}),
     ("snmp_devices", 6, 4, {}),
@@ -318,7 +306,7 @@ def recommended_layout(plugins_cfg: dict) -> list[dict]:
 # Group each widget for the picker (Core monitors / Monitoring capabilities /
 # Integrations), mirroring the Settings → Plugins taxonomy. Capability plugins
 # are host/monitoring facets; traefik/unifi are discrete vendor integrations.
-_CORE_WIDGETS = {"monitors", "status_overview", "uptime_summary", "hosts_overview"}
+_CORE_WIDGETS = {"monitors", "status_overview", "hosts_overview"}
 _INTEGRATION_PLUGINS = {"traefik", "unifi"}
 GROUP_LABELS = {
     "core": "Core monitors",