Fix rich message re-layout.

Fixes #30906.

Telegram/SourceFiles/history/view/history_view_element.h

@@ -764,6 +764,7 @@ protected:
 	[[nodiscard]] int textHeightFor(int textWidth) const;
 	[[nodiscard]] int textRealWidth() const { return _textRealWidth; }
 	void validateText();
+	void invalidateTextSizeCache();
 	void validateTextSkipBlock(bool has, int width, int height);
 	void validateInlineKeyboard(HistoryMessageReplyMarkup *markup);
 
@@ -802,7 +803,6 @@ private:
 	}
 
 	void refreshMedia(Element *replacing);
-	void invalidateTextSizeCache();
 	void setTextWithLinks(
 		const TextWithEntities &text,
 		const std::vector<ClickHandlerPtr> &links = {});

Telegram/SourceFiles/history/view/history_view_message.cpp

@@ -586,6 +586,12 @@ void Message::requestRichPageRelayout(QRect articleRect) {
 	if (const auto rich = const_cast<Message*>(this)->richpage()) {
 		rich->article.invalidateLayout();
 	}
+	// The article layout was just invalidated, but textHeightFor() caches by
+	// _textWidth and would short-circuit when re-queried at the same (constant)
+	// max width, leaving the bubble sized from a stale, now-zeroed
+	// lastLayoutWidth(). Drop the text-size cache too so the article is really
+	// laid out again, the same way blockquoteExpandChanged() does for quotes.
+	invalidateTextSizeCache();
 	setPendingResize();
 	history()->owner().requestViewResize(this);
 }