Show agent liveness, stuck/zombie detection and parse errors in admin

web/style.css

@@ -1385,7 +1385,9 @@ pre.diff .meta {
 }
 
 .rl-status.danger,
-.rl-windows .danger {
+.rl-windows .danger,
+.problems .danger,
+.task-state.danger {
   color: var(--danger);
 }
 
@@ -1402,6 +1404,31 @@ pre.diff .meta {
   border-bottom: 1px solid var(--border);
 }
 
+.problems {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+}
+
+.problems li {
+  padding: 2px 0;
+  word-break: break-word;
+}
+
+.problems summary {
+  color: var(--muted);
+  cursor: pointer;
+}
+
+.raw-line {
+  margin: 4px 0 0;
+  font-size: 11px;
+  white-space: pre-wrap;
+  word-break: break-all;
+  max-height: 12em;
+  overflow-y: auto;
+}
+
 .rl-windows th {
   font-weight: 400;
   font-size: 11px;