fix(helpdesk): unify resolution time layout with ranked list pattern

Replace the custom Ø/Min/Max column layout with the same ranked list
component used for top customers and categories. All three columns
now use identical markup and styling for visual consistency.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

modules/helpdesk/web/css/helpdesk.css

@@ -328,28 +328,6 @@
     margin-bottom: calc(var(--app-spacing) * 0.3);
   }
 
-  .helpdesk-team-perf-times {
-    display: flex;
-    gap: calc(var(--app-spacing) * 0.75);
-  }
-
-  .helpdesk-team-perf-time {
-    display: flex;
-    flex-direction: column;
-  }
-
-  .helpdesk-team-perf-time-value {
-    font-size: clamp(1rem, 0.9rem + 0.3vw, 1.2rem);
-    font-weight: 600;
-    font-variant-numeric: tabular-nums;
-    line-height: 1.2;
-  }
-
-  .helpdesk-team-perf-time-label {
-    font-size: var(--text-xs, 0.75rem);
-    color: var(--app-muted-color);
-  }
-
   .helpdesk-team-perf-ranked {
     list-style: none;
     margin: 0;
@@ -374,6 +352,14 @@
     min-width: 1.5ch;
   }
 
+  .helpdesk-team-perf-ranked-plain {
+    counter-reset: none;
+  }
+
+  .helpdesk-team-perf-ranked-plain li::before {
+    display: none;
+  }
+
   .helpdesk-team-perf-ranked-name {
     flex: 1;
     overflow: hidden;