Dashboard cards, backup last-seen

plugins/computers/plugin.py

@@ -163,6 +163,14 @@ class ComputersPlugin(BasePlugin):
         site that installed an earlier one.
         """
         return [
+            {
+                'key': 'computers_quietreporthours',
+                'value': '24',
+                'valuetype': 'integer',
+                'category': 'computers',
+                'description': 'Hours without a collector report before a PC '
+                               'is listed as not reporting on the dashboard.',
+            },
             {
                 'key': 'computers_machinelink_alerts',
                 'value': 'false',
@@ -1247,14 +1255,30 @@ class ComputersPlugin(BasePlugin):
         return [computerscli]
 
     def get_dashboard_widgets(self) -> List[Dict]:
-        """Return dashboard widget definitions."""
+        """Dashboard cards this plugin contributes.
+
+        REPLACES a declaration that named a Vue component which was never
+        written - as did four other plugins - so nothing rendered and nobody
+        noticed, because the frontend never called the widgets endpoint either.
+        The contract now carries data and a renderer; core draws it.
+        """
         return [
             {
-                'name': 'Computer Status',
-                'component': 'ComputerStatusWidget',
-                'endpoint': '/api/computers/dashboard/summary',
-                'size': 'medium',
-                'position': 6,
+                'id': 'computers-quiet',
+                'title': 'PCs not reporting',
+                'endpoint': '/api/computers/dashboard/quiet',
+                'render': 'exceptions',
+                'severity': 'warning',
+                'permission': 'computers.view',
+                'empty': 'hide',
+                'position': 20,
+                'map': {
+                    'title': 'hostname',
+                    'detail': 'state',
+                    'meta': [{'key': 'quietdays', 'label': 'quiet for',
+                              'suffix': ' days'}],
+                    'link': '/pcs/{computerid}',
+                },
             },
         ]