diff --git a/apps/web/src/pages/ai-avatar/AiAvatarPage.tsx b/apps/web/src/pages/ai-avatar/AiAvatarPage.tsx
index 1e9fb4759..8f899817f 100644
--- a/apps/web/src/pages/ai-avatar/AiAvatarPage.tsx
+++ b/apps/web/src/pages/ai-avatar/AiAvatarPage.tsx
@@ -190,7 +190,7 @@ const AiAvatarPage: React.FC = () => {
     if (state.ttsPreview.status === "generating") {
       state.resetTtsPreview()
     }
-  }, [_clearTtsProgressTimer, state.ttsPreview.status, state])
+  }, [_clearTtsProgressTimer, state])
 
   /* ── 上一步（返回步骤1，不会丢失 TTS 预合成结果） ── */
   const handlePrevStep = useCallback(() => {
@@ -235,12 +235,13 @@ const AiAvatarPage: React.FC = () => {
         return
       }
 
-      let payload: Record<string, unknown>
+      type LipsyncPayload = Parameters<typeof createLipsyncJob>[0]
+      let payload: LipsyncPayload
       if (isPreSynth) {
         // 预合成模式：传 audio_url + audio_duration + sentence_timings（后端直接提交 MediaKit，~2-3s）
         payload = {
           video_url: videoUrl,
-          audio_url: state.ttsPreview.audioUrl,
+          audio_url: state.ttsPreview.audioUrl!,
           audio_duration: state.ttsPreview.duration,
           sentence_timings: state.ttsPreview.sentenceTimings,
           enable_video_loop: false,
diff --git a/tests/unit/test_sentence_timings.py b/tests/unit/test_sentence_timings.py
index c9a00979e..119d68cc1 100644
--- a/tests/unit/test_sentence_timings.py
+++ b/tests/unit/test_sentence_timings.py
@@ -1,4 +1,4 @@
-"""Tests for sentence timing functions in lipsync_tts."""
+"""Tests for sentence timing functions (now in packages/domain/sentence_timings.py)."""
 
 import os
 import subprocess
@@ -6,10 +6,10 @@ import tempfile
 import unittest
 from unittest.mock import MagicMock, patch
 
-from apps.api.app.tasks.lipsync_tts import (
-    _compute_sentence_timings,
-    _estimate_sentence_timings_by_chars,
-    _split_script_into_sentences,
+from packages.domain.sentence_timings import (
+    compute_sentence_timings as _compute_sentence_timings,
+    estimate_sentence_timings_by_chars as _estimate_sentence_timings_by_chars,
+    split_script_into_sentences as _split_script_into_sentences,
 )