better scrollbar in codeblocks + enter anim for delegates

Plugins/ZShell/Llm/markdownparser.cpp

@@ -42,9 +42,18 @@ QVariantList MarkdownParser::parse(const QString& source) {
 		QStringLiteral("\\$\\$(.+?)\\$\\$"),
 		QRegularExpression::DotMatchesEverythingOption);
 
-	auto makeBlock = [](LlmMarkdown::Type type) {
+	auto makeBlock = [&](LlmMarkdown::Type type) {
 		QVariantMap block;
 		block.insert("type", static_cast<int>(type));
+		// Stable per-position identity ("index:type") for the QML
+		// ScriptModel: blocks that survive a re-parse keep their id, so
+		// their delegates are updated in place instead of recreated
+		// (which would drop code highlights mid-stream). The type is
+		// part of the id so a block that changes type is rebuilt.
+		block.insert("id",
+			QString::number(static_cast<int>(blocks.size()))
+			+ QLatin1Char(':')
+			+ QString::number(static_cast<int>(type)));
 		return block;
 	};