diff --git a/dashboard/src/components/chat/ChatInput.vue b/dashboard/src/components/chat/ChatInput.vue
index ea08540ae2..c966d13777 100644
--- a/dashboard/src/components/chat/ChatInput.vue
+++ b/dashboard/src/components/chat/ChatInput.vue
@@ -112,6 +112,10 @@
         ref="inputField"
         v-model="localPrompt"
         @keydown="handleKeyDown"
+        @compositionstart="handleCompositionStart"
+        @compositionend="handleCompositionEnd"
+        @compositioncancel="handleCompositionEnd"
+        @blur="clearCompositionState()"
         :disabled="disabled"
         placeholder="Ask AstrBot..."
         class="chat-textarea"
@@ -307,6 +311,7 @@ import {
 import { useDisplay } from "vuetify";
 import { useModuleI18n } from "@/i18n/composables";
 import { useCustomizerStore } from "@/stores/customizer";
+import { isComposingEnter } from "@/utils/imeInput.mjs";
 import ConfigSelector from "./ConfigSelector.vue";
 import ProviderModelMenu from "./ProviderModelMenu.vue";
 import StyledMenu from "@/components/shared/StyledMenu.vue";
@@ -379,6 +384,8 @@ const providerModelMenuRef = ref<InstanceType<typeof ProviderModelMenu> | null>(
 const showProviderSelector = ref(true);
 const isReplyClosing = ref(false);
 const isDragging = ref(false);
+const isComposing = ref(false);
+const lastCompositionEndAt = ref<number | null>(null);
 let dragLeaveTimeout: number | null = null;
 
 const localPrompt = computed({
@@ -514,6 +521,10 @@ function handleKeyDown(e: KeyboardEvent) {
     return;
   }
 
+  if (isComposingEnter(e, isComposing.value, lastCompositionEndAt.value)) {
+    return;
+  }
+
   const isSendHotkey =
     e.ctrlKey ||
     e.metaKey ||
@@ -533,6 +544,23 @@ function handleKeyDown(e: KeyboardEvent) {
   }
 }
 
+function handleCompositionStart() {
+  isComposing.value = true;
+  lastCompositionEndAt.value = null;
+}
+
+function handleCompositionEnd(e: CompositionEvent) {
+  lastCompositionEndAt.value = e.timeStamp;
+  clearCompositionState({ keepLastEndAt: true });
+}
+
+function clearCompositionState({ keepLastEndAt = false } = {}) {
+  isComposing.value = false;
+  if (!keepLastEndAt) {
+    lastCompositionEndAt.value = null;
+  }
+}
+
 function handleKeyUp(e: KeyboardEvent) {
   if (e.keyCode === 66) {
     ctrlKeyDown.value = false;
@@ -634,6 +662,7 @@ onBeforeUnmount(() => {
   if (inputField.value) {
     inputField.value.removeEventListener("paste", handlePaste);
   }
+  clearCompositionState();
   document.removeEventListener("keyup", handleKeyUp);
 });
 
diff --git a/dashboard/src/utils/imeInput.mjs b/dashboard/src/utils/imeInput.mjs
new file mode 100644
index 0000000000..3c24ffbae8
--- /dev/null
+++ b/dashboard/src/utils/imeInput.mjs
@@ -0,0 +1,31 @@
+// Some IMEs emit Enter right after compositionend; treat that same-keystroke
+// window as composition so selecting a candidate does not send the message.
+const RECENT_COMPOSITION_END_THRESHOLD_MS = 100;
+
+/**
+ * @param {KeyboardEvent} event
+ * @param {boolean} compositionActive
+ * @param {number | null} lastCompositionEndAt
+ */
+export function isComposingEnter(
+  event,
+  compositionActive,
+  lastCompositionEndAt = null,
+) {
+  const hasLegacyCompositionKeyCode =
+    typeof event.keyCode === "number" && event.keyCode === 229;
+  const isAfterRecentCompositionEnd =
+    typeof event.timeStamp === "number" &&
+    typeof lastCompositionEndAt === "number" &&
+    event.timeStamp >= lastCompositionEndAt &&
+    event.timeStamp - lastCompositionEndAt <
+      RECENT_COMPOSITION_END_THRESHOLD_MS;
+
+  return (
+    event.key === "Enter" &&
+    (compositionActive ||
+      event.isComposing ||
+      hasLegacyCompositionKeyCode ||
+      isAfterRecentCompositionEnd)
+  );
+}
diff --git a/dashboard/tests/imeInput.test.mjs b/dashboard/tests/imeInput.test.mjs
new file mode 100644
index 0000000000..1c5fea4731
--- /dev/null
+++ b/dashboard/tests/imeInput.test.mjs
@@ -0,0 +1,36 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import { isComposingEnter } from "../src/utils/imeInput.mjs";
+
+test("detects Enter while an IME composition is active", () => {
+  assert.equal(isComposingEnter({ key: "Enter", isComposing: true }, false), true);
+  assert.equal(isComposingEnter({ key: "Enter", isComposing: false }, true), true);
+});
+
+test("does not treat normal Enter as IME composition", () => {
+  assert.equal(isComposingEnter({ key: "Enter", isComposing: false }, false), false);
+  assert.equal(isComposingEnter({ key: "a", isComposing: true }, true), false);
+});
+
+test("detects Enter fired immediately after composition ended", () => {
+  assert.equal(
+    isComposingEnter(
+      { key: "Enter", isComposing: false, timeStamp: 105 },
+      false,
+      100,
+    ),
+    true,
+  );
+});
+
+test("does not treat delayed Enter after composition ended as IME composition", () => {
+  assert.equal(
+    isComposingEnter(
+      { key: "Enter", isComposing: false, timeStamp: 250 },
+      false,
+      100,
+    ),
+    false,
+  );
+});