fix(unifi): the Overview's history buckets on Postgres; devices name their state (#5207)

#5207 "UniFi Overview tab: func.strftime is SQLite-only": the WAN and
client sparklines bucketed with strftime('%s'), which Postgres lacks, so
/plugins/unifi/rows failed. Traefik's date_bin bucket moves to
core/time_range.time_bucket and both plugins use it. Devices list offline
and failing first, and a state other than online is named (Upgrading,
Adopting, Heartbeat missed...) instead of drawn as Down.

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

plugins/unifi/templates/unifi/rows.html

@@ -50,7 +50,7 @@
       {% for d in devices %}
       <tr>
         <td style="padding:0.2rem 0.5rem 0.2rem 0;">
-          {{ status_dot('up' if d.state == 1 else 'down') }}
+          {% set dot, label = device_state(d.state) %}{{ status_dot(dot, label) }}
           <span style="margin-left:0.3rem;">{{ d.name or d.mac }}</span>
         </td>
         <td style="padding:0.2rem 0.3rem;color:var(--text-muted);font-size:0.78rem;">{{ d.model or d.device_type or "" }}</td>
@@ -62,6 +62,12 @@
           up {{ d.uptime_seconds|duration }}
         </td>
       </tr>
+      {% elif d.state != 1 %}
+      <tr>
+        <td colspan="3" style="padding:0 0 0.3rem 1.2rem;color:var(--text-dim);font-size:0.75rem;">
+          {{ label }}
+        </td>
+      </tr>
       {% endif %}
       {% endfor %}
     </table>