From adc555e58b22ff9df8a92acfecd2eabeb9763d00 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?marker=20dao=20=C2=AE?= <youdontknow@marker-dao.eth>
Date: Thu, 16 Apr 2026 13:41:23 +0200
Subject: [PATCH 1/2] Chat Prompt Suggestions: Support nested option path for
 suggestions updates

---
 packages/devextreme/js/__internal/ui/chat/chat.ts     |  6 ++++--
 .../DevExpress.ui.widgets/chatParts/chat.tests.js     | 11 +++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/packages/devextreme/js/__internal/ui/chat/chat.ts b/packages/devextreme/js/__internal/ui/chat/chat.ts
index 4666147a3f96..8caf6ec4bfad 100644
--- a/packages/devextreme/js/__internal/ui/chat/chat.ts
+++ b/packages/devextreme/js/__internal/ui/chat/chat.ts
@@ -786,9 +786,11 @@ class Chat extends Widget<ChatProperties> {
         this._createSendButtonAction();
         this._messageBox.option(name, this._getSendButtonOptionsWithAction());
         break;
-      case 'suggestions':
-        this._suggestions?.updateOptions(value as ChatProperties['suggestions']);
+      case 'suggestions': {
+        const options = Widget.getOptionsFromContainer(args);
+        this._suggestions?.updateOptions(options);
         break;
+      }
       default:
         super._optionChanged(args);
     }
diff --git a/packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/chat.tests.js b/packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/chat.tests.js
index 460078a1d63b..541e26164c7e 100644
--- a/packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/chat.tests.js
+++ b/packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/chat.tests.js
@@ -2821,6 +2821,17 @@ QUnit.module('Chat', () => {
             assert.strictEqual(this.getSuggestionsElement().length, 1, 'suggestions container remains in DOM');
             assert.strictEqual(this.getSuggestionItems().length, 0, 'items are removed');
         });
+
+        QUnit.test('suggestions items should be updated via nested option path', function(assert) {
+            this.reinit({
+                suggestions: { items: [{ text: 'Item 1' }] },
+            });
+
+            this.instance.option('suggestions.items', [{ text: 'New 1' }, { text: 'New 2' }]);
+
+            assert.strictEqual(this.getSuggestionItems().length, 2, 'items count updated via nested path');
+            assert.strictEqual(this.getSuggestionItems().eq(0).text(), 'New 1', 'first item text updated');
+        });
     });
 
     QUnit.module('Data Layer Integration', {

From d82f25e7f80819378689b0788ef2961156caea17 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?marker=20dao=20=C2=AE?= <youdontknow@marker-dao.eth>
Date: Thu, 16 Apr 2026 14:23:21 +0200
Subject: [PATCH 2/2] fix(optionChanged)

---
 .../devextreme/js/__internal/ui/chat/chat.ts  |  4 ++--
 .../chatParts/chat.tests.js                   | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/packages/devextreme/js/__internal/ui/chat/chat.ts b/packages/devextreme/js/__internal/ui/chat/chat.ts
index 8caf6ec4bfad..81549c6a5dae 100644
--- a/packages/devextreme/js/__internal/ui/chat/chat.ts
+++ b/packages/devextreme/js/__internal/ui/chat/chat.ts
@@ -787,8 +787,8 @@ class Chat extends Widget<ChatProperties> {
         this._messageBox.option(name, this._getSendButtonOptionsWithAction());
         break;
       case 'suggestions': {
-        const options = Widget.getOptionsFromContainer(args);
-        this._suggestions?.updateOptions(options);
+        const { suggestions } = this.option();
+        this._suggestions?.updateOptions(suggestions);
         break;
       }
       default:
diff --git a/packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/chat.tests.js b/packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/chat.tests.js
index 541e26164c7e..806400237bd4 100644
--- a/packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/chat.tests.js
+++ b/packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/chat.tests.js
@@ -2832,6 +2832,25 @@ QUnit.module('Chat', () => {
             assert.strictEqual(this.getSuggestionItems().length, 2, 'items count updated via nested path');
             assert.strictEqual(this.getSuggestionItems().eq(0).text(), 'New 1', 'first item text updated');
         });
+
+        QUnit.test('nested option update should not drop other suggestions options', function(assert) {
+            assert.expect(1);
+
+            const clickedText = 'Item 1';
+
+            this.reinit({
+                suggestions: {
+                    items: [{ text: clickedText }],
+                    onItemClick: (e) => {
+                        assert.strictEqual(e.itemData.text, clickedText, 'onItemClick preserved after nested update');
+                    },
+                },
+            });
+
+            this.instance.option('suggestions.items', [{ text: clickedText }, { text: 'Item 2' }]);
+
+            this.getSuggestionItems().first().trigger('dxclick');
+        });
     });
 
     QUnit.module('Data Layer Integration', {