Revert the silent source export of whole answers

app/MindWork AI Studio/wwwroot/changelog/v26.9.1.md

@@ -70,7 +70,6 @@
 - Fixed an assistant refusing to work after you switched on the cleanup of web content without having chosen a model first. Its button did nothing at all, and only closing the assistant and starting over helped. The cleanup now follows the model of the assistant you are working in, the moment you pick one.
 - Fixed the Visual Briefing assistant (in preview) not scrolling, which put everything below the window edge out of reach and made the assistant unusable. The briefing preview is now shown at its intended size inside its frame, and switching between the desktop, tablet, and mobile view changes its width as it should.
 - Fixed exported answers losing their sources. When an answer is based on web pages a tool read or on documents of your own, the exported file now lists those sources in every format AI Studio writes.
-- Fixed exporting an answer made only of one complete HTML code block. AI Studio now saves the source directly, without Markdown fences or a Pandoc conversion.
 - Fixed the copy button leaving the sources behind. Copy an answer, and its sources come along.
 - Fixed a tile that opens a chat directly always demanding a workspace. Leave the workspace empty in the Assistant Builder, and the tile opens a disappearing chat instead.
 - Fixed the same restriction for plugin authors: a direct-chat launcher can now open a chat without naming a workspace. The example assistant plugin shows both ways.