Chat FU: Hide download button of File when onDownload is not passed

[r-farkhutdinov]

No description provided.

[Copilot]

Pull Request Overview

This pull request implements conditional rendering of the attachment download button in the Chat component. The download button is now only shown when the onAttachmentDownload callback is provided, preventing users from attempting to download attachments without a proper handler.

Key changes:

• Introduces showAttachmentDownloadButton option that propagates from Chat through MessageList, MessageGroup, MessageBubble, FileView to File components
• The option is automatically set based on whether onAttachmentDownload callback is provided
• Updates tests to explicitly set showDownloadButton: true where download functionality is being tested

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/devextreme/js/__internal/ui/chat/chat.ts	Derives showAttachmentDownloadButton from onAttachmentDownload presence and propagates it to MessageList
packages/devextreme/js/__internal/ui/chat/messagelist.ts	Adds showAttachmentDownloadButton property and passes it to MessageGroup components
packages/devextreme/js/__internal/ui/chat/messagegroup.ts	Adds showAttachmentDownloadButton property and passes it to MessageBubble components
packages/devextreme/js/__internal/ui/chat/messagebubble.ts	Adds showAttachmentDownloadButton property, stores FileView reference, and handles runtime option changes
packages/devextreme/js/__internal/ui/chat/file_view/file_view.ts	Adds showDownloadButton property and passes it to File components
packages/devextreme/js/__internal/ui/chat/file_view/file.ts	Implements conditional button rendering based on showDownloadButton option
packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/messageBubble.tests.js	Updates tests to set showAttachmentDownloadButton: true
packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/fileView.tests.js	Updates tests to set showDownloadButton: true
packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/file.tests.js	Updates test setup and adds guards for button access
packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/file.markup.tests.js	Adds tests for showDownloadButton option behavior
packages/devextreme/testing/tests/DevExpress.ui.widgets/chatParts/chat.tests.js	Adds test for button hiding when callback is undefined

[Copilot]

Pull Request Overview

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.