diff --git a/lifelog-recorder/app/src/main/kotlin/com/lemon/lifelog/MainActivity.kt b/lifelog-recorder/app/src/main/kotlin/com/lemon/lifelog/MainActivity.kt
index 05aeea9..3942fa5 100644
--- a/lifelog-recorder/app/src/main/kotlin/com/lemon/lifelog/MainActivity.kt
+++ b/lifelog-recorder/app/src/main/kotlin/com/lemon/lifelog/MainActivity.kt
@@ -121,9 +121,8 @@ class MainActivity : ComponentActivity() {
 
 private enum class Tab(val label: String, val icon: String) {
     People("人物", "👤"),       // 通讯录 + 联系人档案（CRM 核心，放第一位）
-    Recording("录音", "⏺"),   // 顶部子页：录音 / 时间轴
+    Recording("录音", "⏺"),   // 顶部子页：录音 / 时间轴 / 声纹 / 纪要
     Chat("对话", "💬"),
-    Memo("纪要", "✎"),         // 顶部子页：声纹 / 纪要
     Album("相册", "🖼"),
     Settings("设置", "⚙"),
 }
@@ -151,9 +150,8 @@ private fun MainScreen() {
     var filterSpeakerId by remember { mutableStateOf<Long?>(null) }
     // Cross-tab jump: a summary bullet sets an absolute timestamp to scroll the timeline to.
     var jumpToTs by remember { mutableStateOf<Long?>(null) }
-    // 合并页的顶部子 tab：录音页 0=录音 1=时间轴；纪要页 0=声纹 1=纪要。
+    // 录音页顶部子 tab：0=录音 1=时间轴 2=声纹 3=纪要（声纹/纪要原是「纪要」菜单，已并入此处）。
     var recordingSub by remember { mutableStateOf(0) }
-    var memoSub by remember { mutableStateOf(0) }
 
     val speakers by repo.speakers.observeAll().collectAsState(initial = emptyList())
 
@@ -181,14 +179,9 @@ private fun MainScreen() {
                     sub = recordingSub, onSub = { recordingSub = it },
                     filterSpeakerId = filterSpeakerId, onFilterSpeakerId = { filterSpeakerId = it },
                     jumpToTs = jumpToTs, onJumpConsumed = { jumpToTs = null },
+                    onJumpTo = { ts -> jumpToTs = ts },
                 )
                 Tab.Chat -> ChatTab(repo)
-                Tab.Memo -> MemoScreen(
-                    repo = repo, activity = activity, speakers = speakers,
-                    sub = memoSub, onSub = { memoSub = it },
-                    onFilterBySpeaker = { id -> filterSpeakerId = id; recordingSub = 1; tab = Tab.Recording },
-                    onJumpToTime = { ts -> filterSpeakerId = null; jumpToTs = ts; recordingSub = 1; tab = Tab.Recording },
-                )
                 Tab.Album -> AlbumTab(repo)
                 Tab.Settings -> SettingsScreen(activity)
             }
@@ -209,17 +202,19 @@ private fun RecordingScreen(
     onFilterSpeakerId: (Long?) -> Unit,
     jumpToTs: Long?,
     onJumpConsumed: () -> Unit,
+    onJumpTo: (Long) -> Unit,
 ) {
     Column(modifier = Modifier.fillMaxSize()) {
         androidx.compose.material3.TabRow(selectedTabIndex = sub) {
             androidx.compose.material3.Tab(selected = sub == 0, onClick = { onSub(0) }, text = { Text("录音") })
             androidx.compose.material3.Tab(selected = sub == 1, onClick = { onSub(1) }, text = { Text("时间轴") })
+            androidx.compose.material3.Tab(selected = sub == 2, onClick = { onSub(2) }, text = { Text("声纹") })
+            androidx.compose.material3.Tab(selected = sub == 3, onClick = { onSub(3) }, text = { Text("纪要") })
         }
         Box(modifier = Modifier.weight(1f)) {
-            if (sub == 0) {
-                HomeTab(activity, repo, onOpenTimeline = { onSub(1) })
-            } else {
-                TimelineTab(
+            when (sub) {
+                0 -> HomeTab(activity, repo, onOpenTimeline = { onSub(1) })
+                1 -> TimelineTab(
                     repo = repo,
                     speakers = speakers,
                     filterSpeakerId = filterSpeakerId,
@@ -227,31 +222,16 @@ private fun RecordingScreen(
                     jumpToTs = jumpToTs,
                     onJumpConsumed = onJumpConsumed,
                 )
-            }
-        }
-    }
-}
-
-@Composable
-private fun MemoScreen(
-    repo: Repository,
-    activity: Context,
-    speakers: List<SpeakerProfile>,
-    sub: Int,
-    onSub: (Int) -> Unit,
-    onFilterBySpeaker: (Long) -> Unit,
-    onJumpToTime: (Long) -> Unit,
-) {
-    Column(modifier = Modifier.fillMaxSize()) {
-        androidx.compose.material3.TabRow(selectedTabIndex = sub) {
-            androidx.compose.material3.Tab(selected = sub == 0, onClick = { onSub(0) }, text = { Text("声纹") })
-            androidx.compose.material3.Tab(selected = sub == 1, onClick = { onSub(1) }, text = { Text("纪要") })
-        }
-        Box(modifier = Modifier.weight(1f)) {
-            if (sub == 0) {
-                SpeakersTab(repo = repo, speakers = speakers, onFilterBySpeaker = onFilterBySpeaker)
-            } else {
-                SummariesTab(repo = repo, activity = activity, onJumpToTime = onJumpToTime)
+                2 -> SpeakersTab(
+                    repo = repo, speakers = speakers,
+                    // 点声纹 → 按 TA 筛选时间轴
+                    onFilterBySpeaker = { id -> onFilterSpeakerId(id); onSub(1) },
+                )
+                else -> SummariesTab(
+                    repo = repo, activity = activity,
+                    // 点纪要时间戳 → 跳时间轴对应段
+                    onJumpToTime = { ts -> onFilterSpeakerId(null); onJumpTo(ts); onSub(1) },
+                )
             }
         }
     }