feat: add orphaned app cleanup — auto-filter stale discovered apps, manual dismiss with data purge

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

ui/src/pages/AgentHealth/AgentHealth.tsx

@@ -13,6 +13,8 @@ import logStyles from '../../styles/log-panel.module.css';
 import { useAgents, useAgentEvents } from '../../api/queries/agents';
 import { useApplicationLogs } from '../../api/queries/logs';
 import { useApplicationConfig, useUpdateApplicationConfig } from '../../api/queries/commands';
+import { useCatalog, useDismissApp } from '../../api/queries/catalog';
+import { useIsAdmin } from '../../auth/auth-store';
 import { useEnvironmentStore } from '../../api/environment-store';
 import type { ConfigUpdateResponse } from '../../api/queries/commands';
 import type { AgentInstance } from '../../api/types';
@@ -103,6 +105,12 @@ export default function AgentHealth() {
   const { data: appConfig } = useApplicationConfig(appId);
   const updateConfig = useUpdateApplicationConfig();
 
+  const isAdmin = useIsAdmin();
+  const selectedEnvForCatalog = useEnvironmentStore((s) => s.environment);
+  const { data: catalogApps } = useCatalog(selectedEnvForCatalog);
+  const dismissApp = useDismissApp();
+  const catalogEntry = catalogApps?.find((a) => a.slug === appId);
+
   const [configEditing, setConfigEditing] = useState(false);
   const [configDraft, setConfigDraft] = useState<Record<string, string | boolean>>({});
 
@@ -468,6 +476,46 @@ export default function AgentHealth() {
         </div>
       )}
 
+      {/* Dismiss application card — shown when app-scoped, no agents, admin */}
+      {appId && agentList.length === 0 && isAdmin && (
+        <div className={`${sectionStyles.section}`} style={{ marginBottom: 16, padding: '16px 20px' }}>
+          <div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between' }}>
+            <div>
+              <strong>No agents connected</strong>
+              {catalogEntry && (
+                <span style={{ marginLeft: 8, color: 'var(--text-muted)', fontSize: 13 }}>
+                  {catalogEntry.managed ? 'Managed app' : 'Discovered app'} &mdash; {catalogEntry.exchangeCount.toLocaleString()} exchanges recorded
+                </span>
+              )}
+            </div>
+            <Button
+              variant="danger"
+              size="sm"
+              disabled={dismissApp.isPending}
+              onClick={() => {
+                const count = catalogEntry?.exchangeCount ?? 0;
+                const ok = window.confirm(
+                  `Dismiss "${appId}" and permanently delete all data (${count.toLocaleString()} exchanges)?\n\nThis action cannot be undone.`
+                );
+                if (ok) {
+                  dismissApp.mutate(appId, {
+                    onSuccess: () => {
+                      toast({ title: 'Application dismissed', description: `${appId} and all associated data have been deleted`, variant: 'success' });
+                      navigate('/runtime');
+                    },
+                    onError: (err) => {
+                      toast({ title: 'Dismiss failed', description: err.message, variant: 'error', duration: 86_400_000 });
+                    },
+                  });
+                }
+              }}
+            >
+              {dismissApp.isPending ? 'Dismissing\u2026' : 'Dismiss Application'}
+            </Button>
+          </div>
+        </div>
+      )}
+
       {/* Group cards grid */}
       <div className={isFullWidth ? styles.groupGridSingle : styles.groupGrid}>
         {groups.map((group) => (