feat: Live Dashboard redesign — 6 columns, hover details, last-alert column

Replaces the 11-column table with severity-sorted record rows: host,
combined status chip, latency, alert chips, time-in-state, and the most
recent alert message. Per-family address/state/latency/last-change move
to a hover card on the status chip and permanently to a new Connectivity
table in the Host Overview info section (host info API now includes
connections). Last-alert is seeded from /api/0/alerts and kept fresh
from the event stream; the event log below uses the same row idiom with
its filters intact. WS reconnect state shows in the toolbar instead of
a modal.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NfPpSpccTWBfZg1FTveyaU

hbd/server/http.py

@@ -258,12 +258,25 @@ def _build_host_info(host, threshold_checker=None) -> dict:
             key=lambda x: x["metric"],
         )
 
+    connections = [
+        {
+            "family": getattr(conn, "afam", family),
+            "addr": getattr(conn, "addr", ""),
+            "state": getattr(conn, "state", ""),
+            "rtt": (getattr(conn, "rtts", None) or [None])[0],
+            "statetime": getattr(conn, "statetime", None),
+            "lastbeat": getattr(conn, "lastbeat", None),
+        }
+        for family, conn in sorted(host.connections.items())
+    ]
+
     return {
         "owner": getattr(host, "owner", None),
         "managers": list(getattr(host, "managers", [])),
         "hbc_version": hbc_version,
         "hbc_type": hbc_type,
         "last_packet": last_packet,
+        "connections": connections,
         "thresholds": thresholds,
     }