(control) Add a summary table for Actors in the Node overview

code/api/executor-api/src/main/java/nu/marginalia/executor/model/ActorRunState.java

@@ -14,7 +14,7 @@ public record ActorRunState(String name,
 
     public String stateIcon() {
         if (terminal) {
-            return "\uD83D\uDE34";
+            return "\uD83D\uDC80"; // Unicode Skull
         }
         else if (state.equals("MONITOR")) {
             return "\uD83D\uDD26";

code/services-core/control-service/src/main/java/nu/marginalia/control/node/svc/ControlNodeService.java

@@ -319,12 +319,18 @@ public class ControlNodeService {
     private Object nodeOverviewModel(Request request, Response response) throws SQLException {
         int nodeId = Integer.parseInt(request.params("id"));
         var config = nodeConfigurationService.get(nodeId);
+
+        var actors = executorClient.getActorStates(Context.fromRequest(request), nodeId).states();
+
+        actors.removeIf(actor -> actor.state().equals("MONITOR"));
+
         return Map.of(
                 "node", new IndexNode(nodeId),
                 "status", getStatus(config),
                 "events", getEvents(nodeId),
                 "processes", heartbeatService.getProcessHeartbeatsForNode(nodeId),
                 "jobs", heartbeatService.getTaskHeartbeatsForNode(nodeId),
+                "actors", actors,
                 "tab", Map.of("overview", true)
                 );
     }

code/services-core/control-service/src/main/resources/templates/control/node/node-overview.hdb

@@ -11,6 +11,7 @@
 
     <div class="mt-2">
     {{> control/partials/processes-table }}
+    {{> control/partials/actor-summary-table }}
     </div>
     <div class="mt-2">
     {{> control/partials/events-table-summary }}
@@ -21,7 +22,7 @@
 {{> control/partials/foot-includes }}
 <script>
     window.setInterval(() => {
-        refresh(["processes", "jobs", "events"]);
+        refresh(["processes", "jobs", "events", "actors"]);
     }, 2000);
 </script>
 </html>

code/services-core/control-service/src/main/resources/templates/control/node/nodes-list.hdb

@@ -15,8 +15,14 @@
 
     {{#if nodes}}
     <div class="my-3 p-3 border bg-light">
+        <p>
             Index nodes are processing units.  The search engine requires at least one, but more can be added
             to spread the system load across multiple physical disks or even multiple servers.
+        </p>
+        <p>
+            New index nodes register themselves automatically upon start-up.  They can't be fully removed,
+            but can be disabled in the settings.
+        </p>
     </div>
 
     <table class="table">

code/services-core/control-service/src/main/resources/templates/control/partials/actor-summary-table.hdb

@@ -0,0 +1,20 @@
+<h2>Actor Summary</h2>
+<small class="text-muted">Idle monitoring actors are hidden.  See the <a href="/nodes/{{node.id}}/actors">Actors tab</a>
+    for a complete view.</small>
+<table id="actors" class="table">
+    <tr>
+        <th>Actor</th>
+        <th>State</th>
+    </tr>
+    {{#each actors}}
+        <tr>
+            <td title="{{actorDescription}}">{{name}}</td>
+            <td title="{{stateDescription}}">{{stateIcon}}&nbsp;{{state}}</td>
+        </tr>
+    {{/each}}
+    {{#unless actors}}
+        <tr>
+            <td colspan="2">No activity</td>
+        </tr>
+    {{/unless}}
+</table>