feat(chat): change Enter key to approve actions instead of reject

When action approval buttons are visible (like Approve/Save/Run Command):
- Empty input + Enter: now approves the action (previously did nothing)
- Text input + Enter: now approves with the text as feedback (previously rejected)

This change makes the Enter key behavior more intuitive:
- Enter always confirms/approves the current action
- Users can still provide optional feedback text before approving

Fixes #10350

webview-ui/src/components/chat/ChatTextArea.tsx

@@ -42,6 +42,7 @@ interface ChatTextAreaProps {
 	selectedImages: string[]
 	setSelectedImages: React.Dispatch<React.SetStateAction<string[]>>
 	onSend: () => void
+	onAccept?: () => void // Called when Enter should trigger approval (when action buttons are visible)
 	onSelectImages: () => void
 	shouldDisableImages: boolean
 	onHeightChange?: (height: number) => void
@@ -66,6 +67,7 @@ export const ChatTextArea = forwardRef<HTMLTextAreaElement, ChatTextAreaProps>(
 			selectedImages,
 			setSelectedImages,
 			onSend,
+			onAccept,
 			onSelectImages,
 			shouldDisableImages,
 			onHeightChange,
@@ -486,20 +488,23 @@ export const ChatTextArea = forwardRef<HTMLTextAreaElement, ChatTextAreaProps>(
 
 				// Handle Enter key based on enterBehavior setting
 				if (event.key === "Enter" && !isComposing) {
+					// Determine the action handler: use onAccept if provided (for approval behavior), otherwise onSend
+					const actionHandler = onAccept ?? onSend
+
 					if (enterBehavior === "newline") {
-						// New behavior: Enter = newline, Shift+Enter or Ctrl+Enter = send
+						// New behavior: Enter = newline, Shift+Enter or Ctrl+Enter = send/accept
 						if (event.shiftKey || event.ctrlKey || event.metaKey) {
 							event.preventDefault()
 							resetHistoryNavigation()
-							onSend()
+							actionHandler()
 						}
 						// Otherwise, let Enter create newline (don't preventDefault)
 					} else {
-						// Default behavior: Enter = send, Shift+Enter = newline
+						// Default behavior: Enter = send/accept, Shift+Enter = newline
 						if (!event.shiftKey) {
 							event.preventDefault()
 							resetHistoryNavigation()
-							onSend()
+							actionHandler()
 						}
 					}
 				}
@@ -550,6 +555,7 @@ export const ChatTextArea = forwardRef<HTMLTextAreaElement, ChatTextAreaProps>(
 			},
 			[
 				onSend,
+				onAccept,
 				showContextMenu,
 				searchQuery,
 				selectedMenuIndex,

webview-ui/src/components/chat/ChatView.tsx

@@ -1600,6 +1600,12 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 				selectedImages={selectedImages}
 				setSelectedImages={setSelectedImages}
 				onSend={() => handleSendMessage(inputValue, selectedImages)}
+				onAccept={
+					// When action buttons are visible, Enter should trigger approval (primary button click)
+					enableButtons && primaryButtonText
+						? () => handlePrimaryButtonClick(inputValue, selectedImages)
+						: undefined
+				}
 				onSelectImages={selectImages}
 				shouldDisableImages={shouldDisableImages}
 				onHeightChange={() => {