fix: trim text when pasting in chat

packages/frontend/editor-ui/src/features/ai/chatHub/components/ChatPrompt.vue

@@ -118,6 +118,33 @@ function handleKeydownTextarea(e: KeyboardEvent) {
 	}
 }
 
+function handlePaste(e: ClipboardEvent) {
+	e.preventDefault();
+
+	const text = e.clipboardData?.getData('text');
+
+	if (!text) {
+		return;
+	}
+
+	// Text copied from conversation history tends to
+	// include unnecessary leading & trailing whitespaces, so we're removing them
+	const trimmed = text.trim();
+
+	const textarea = e.target as HTMLTextAreaElement;
+	const start = textarea.selectionStart;
+	const end = textarea.selectionEnd;
+	const before = message.value.substring(0, start);
+	const after = message.value.substring(end);
+
+	message.value = before + trimmed + after;
+
+	setTimeout(() => {
+		const newPosition = start + trimmed.length;
+		textarea.setSelectionRange(newPosition, newPosition);
+	}, 0);
+}
+
 function handleClickInputWrapper() {
 	inputRef.value?.focus();
 }
@@ -225,6 +252,7 @@ defineExpose({
 					autofocus
 					:disabled="isMissingCredentials || !selectedModel"
 					@keydown="handleKeydownTextarea"
+					@paste="handlePaste"
 				/>
 
 				<div :class="$style.footer">