diff --git a/app/javascript/dashboard/components-next/captain/assistant/AssistantPlayground.vue b/app/javascript/dashboard/components-next/captain/assistant/AssistantPlayground.vue
index 51aae6477..09e85e6c2 100644
--- a/app/javascript/dashboard/components-next/captain/assistant/AssistantPlayground.vue
+++ b/app/javascript/dashboard/components-next/captain/assistant/AssistantPlayground.vue
@@ -80,6 +80,12 @@ const sendMessage = async () => {
     isLoading.value = false;
   }
 };
+
+const handleEnterKey = event => {
+  if (event.isComposing) return;
+  event.preventDefault();
+  sendMessage();
+};
 </script>
 
 <template>
@@ -113,7 +119,7 @@ const sendMessage = async () => {
         v-model="newMessage"
         class="flex-1 bg-transparent border-none focus:outline-none text-sm mb-0 text-n-slate-12 placeholder:text-n-slate-10"
         :placeholder="t('CAPTAIN.PLAYGROUND.MESSAGE_PLACEHOLDER')"
-        @keyup.enter="sendMessage"
+        @keydown.enter.exact="handleEnterKey"
       />
       <NextButton
         ghost
diff --git a/app/javascript/dashboard/components-next/copilot/CopilotInput.vue b/app/javascript/dashboard/components-next/copilot/CopilotInput.vue
index 852506a4c..377031d25 100644
--- a/app/javascript/dashboard/components-next/copilot/CopilotInput.vue
+++ b/app/javascript/dashboard/components-next/copilot/CopilotInput.vue
@@ -29,6 +29,12 @@ const handleInput = () => {
   nextTick(adjustHeight);
 };
 
+const handleEnterKey = event => {
+  if (event.isComposing) return;
+  event.preventDefault();
+  sendMessage();
+};
+
 onMounted(() => {
   nextTick(adjustHeight);
 });
@@ -43,7 +49,7 @@ onMounted(() => {
       class="w-full reset-base bg-n-alpha-3 ltr:pl-4 ltr:pr-12 rtl:pl-12 rtl:pr-4 py-3 text-sm border border-n-weak rounded-lg focus:outline-0 focus:outline-none focus:ring-2 focus:ring-n-blue-11 focus:border-n-blue-11 resize-none overflow-hidden max-h-[200px] mb-0 text-n-slate-12"
       rows="1"
       @input="handleInput"
-      @keydown.enter.exact.prevent="sendMessage"
+      @keydown.enter.exact="handleEnterKey"
     />
     <button
       class="absolute ltr:right-1 rtl:left-1 top-1/2 -translate-y-1/2 h-9 w-10 flex items-center justify-center text-n-slate-11 hover:text-n-blue-11"
diff --git a/app/javascript/dashboard/components/widgets/WootWriter/CopilotEditor.vue b/app/javascript/dashboard/components/widgets/WootWriter/CopilotEditor.vue
index 47b79dd57..cb4c93932 100644
--- a/app/javascript/dashboard/components/widgets/WootWriter/CopilotEditor.vue
+++ b/app/javascript/dashboard/components/widgets/WootWriter/CopilotEditor.vue
@@ -107,7 +107,8 @@ function onKeydown(view, event) {
   emit('keydown');
 
   // Handle Enter key to send message (Shift+Enter for new line)
-  if (event.key === 'Enter' && !event.shiftKey) {
+  // Skip if IME composition is active (CJK character confirmation)
+  if (event.key === 'Enter' && !event.shiftKey && !event.isComposing) {
     event.preventDefault();
     handleSubmit();
     return true; // Prevent ProseMirror's default Enter handling