diff --git a/templates/chat.html b/templates/chat.html
index 6eb2e98..e303392 100644
--- a/templates/chat.html
+++ b/templates/chat.html
@@ -809,10 +809,6 @@ function resetNewConversation({ preserveInput = false } = {}) {
 
 async function newConversation() {
   if (pending) return;
-  if (getPresetPrompt()) {
-    await startPresetConversation();
-    return;
-  }
   resetNewConversation();
 }
 
@@ -1060,53 +1056,11 @@ async function streamChat(messages, aiBubble) {
   return full;
 }
 
-async function startPresetConversation({ preserveInput = false } = {}) {
+function ensurePresetLoaded() {
+  if (currentConvId || history.length > 0) return;
   const preset = getPresetPrompt();
-  if (!preset) {
-    resetNewConversation({ preserveInput });
-    return;
-  }
-
-  pending = true;
-  setInputDisabled(true);
-  const keepText = preserveInput ? inputBox.value : '';
-  let aiBubble = null;
-
-  try {
-    resetNewConversation({ preserveInput });
-    inputBox.value = keepText;
-    autoResize();
-    clearImage();
-
-    const conv = await createConversation();
-    currentConvId = conv.id;
-    await loadConversationList();
-
-    history = [
-      { role: 'system', content: preset, hidden: true },
-      {
-        role: 'user',
-        content: '请根据以上预先提示词，用简短自然的方式输出开场白，然后等待用户开始聊天。',
-        hidden: true
-      }
-    ];
-
-    aiBubble = addAIBubble();
-    const full = await streamChat(history, aiBubble);
-    history.push({ role: 'assistant', content: full });
-    scrollToBottom();
-    await loadConversationList();
-  } catch (e) {
-    if (!aiBubble) aiBubble = addAIBubble();
-    aiBubble.txt.innerHTML = `<span class="error-msg">错误: ${escHtml(e.message)}</span>`;
-    aiBubble.bub.classList.remove('typing-cursor');
-  } finally {
-    pending = false;
-    setInputDisabled(false);
-    inputBox.value = keepText;
-    autoResize();
-    inputBox.focus();
-  }
+  if (!preset) return;
+  history = [{ role: 'system', content: preset, hidden: true }];
 }
 
 // ── 发送消息 ──────────────────────────────────────────────
@@ -1115,17 +1069,13 @@ async function sendMessage() {
   const userText = inputBox.value.trim();
   if (!userText && !imageB64) return;
 
-  if (!currentConvId && history.length === 0 && getPresetPrompt()) {
-    await startPresetConversation({ preserveInput: true });
-    return;
-  }
-
   pending = true;
   setInputDisabled(true);
   let aiBubble = null;
 
   try {
     if (!currentConvId) {
+      ensurePresetLoaded();
       const conv = await createConversation();
       currentConvId = conv.id;
       await loadConversationList();