added delete

app/components/chat/sidebar.js

@@ -0,0 +1,34 @@
+import Component from '@glimmer/component';
+import { service } from '@ember/service';
+import { action } from '@ember/object';
+import ENV from 'frontend-lblod-chat/config/environment';
+import { setting } from 'frontend-lblod-chat/utils/setting';
+
+export default class ChatSidebar extends Component {
+  @service store;
+  @service router;
+  assistantPath = setting(ENV.assistantPath, '/assistant');
+
+  // The trash bin behind a conversation. The backend removes the messages,
+  // the bijlagen and the reports with it.
+  @action
+  async delete(conversation) {
+    if (!window.confirm('Dit gesprek verwijderen?')) return;
+    const res = await fetch(
+      `${this.assistantPath}/conversations/${conversation.id}`,
+      { method: 'DELETE' },
+    );
+    if (!res.ok) {
+      window.alert('Het gesprek kon niet verwijderd worden.');
+      return;
+    }
+    this.store.unloadRecord(conversation);
+    // The open conversation is gone; leave its route before it 404s. Any
+    // other route only needs its sidebar list refreshed.
+    if (this.args.currentConversation?.id === conversation.id) {
+      this.router.transitionTo('conversations');
+    } else {
+      this.router.refresh();
+    }
+  }
+}