Fix quick chat layout (microsoft#229885)

Enable chat input to grow and increase the size of the chat widget overall.

Fix microsoft#229627
Also fix toolbar alignment in quick chat when the input is multiple lines

Author: roblourens

src/vs/workbench/contrib/chat/browser/chatWidget.ts

@@ -952,7 +952,8 @@ export class ChatWidget extends Disposable implements IChatWidget {
 		width = Math.min(width, 850);
 		this.bodyDimension = new dom.Dimension(width, height);
 
-		this.inputPart.layout(height, width);
+		const inputPartMaxHeight = this._dynamicMessageLayoutData?.enabled ? this._dynamicMessageLayoutData.maxHeight : height;
+		this.inputPart.layout(inputPartMaxHeight, width);
 		const inputPartHeight = this.inputPart.inputPartHeight;
 		const lastElementVisible = this.tree.scrollTop + this.tree.renderHeight >= this.tree.scrollHeight;
 

src/vs/workbench/contrib/chat/browser/media/chat.css

@@ -863,8 +863,14 @@ have to be updated for changes to the rules above, or to support more deeply nes
 	margin: 0 3px;
 }
 
+.quick-input-widget .interactive-session .interactive-input-part .chat-input-toolbars .monaco-toolbar,
+.quick-input-widget .interactive-session .interactive-input-part .chat-input-toolbars .actions-container {
+	height: initial;
+}
+
 .quick-input-widget .interactive-session .interactive-input-part .chat-input-toolbars {
 	margin-bottom: 1px;
+	align-items: flex-end;
 }
 
 .quick-input-widget .interactive-session .chat-input-container {