diff --git a/lifelog-recorder/app/src/main/AndroidManifest.xml b/lifelog-recorder/app/src/main/AndroidManifest.xml
index 8f8dbae..71b00cb 100644
--- a/lifelog-recorder/app/src/main/AndroidManifest.xml
+++ b/lifelog-recorder/app/src/main/AndroidManifest.xml
@@ -21,7 +21,7 @@
 
     <application
         android:name=".LifelogApp"
-        android:label="Lifelog"
+        android:label="@string/app_name"
         android:icon="@mipmap/ic_launcher"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:allowBackup="false"
@@ -33,7 +33,7 @@
         <activity
             android:name=".MainActivity"
             android:exported="true"
-            android:label="Lifelog"
+            android:label="@string/app_name"
             android:windowSoftInputMode="adjustResize"
             android:theme="@style/Theme.Lifelog">
             <intent-filter>
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 42dfd38..dfe7391 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
@@ -122,8 +122,9 @@ class MainActivity : ComponentActivity() {
 }
 
 private enum class Tab(val label: String, val icon: String) {
-    Chat("对话", "💬"),         // 默认首页：AI 对话 + 工具模式
+    Chat("对话", "💬"),
     People("人物", "👤"),
+    Timeline("时间轴", "🕐"),   // Life OS 核心：跨源统一时间轴
     Recording("录音", "⏺"),
     Album("相册", "🖼"),
     Settings("设置", "⚙"),
@@ -175,6 +176,7 @@ private fun MainScreen() {
     ) { inner ->
         Box(modifier = Modifier.padding(inner)) {
             when (tab) {
+                Tab.Timeline -> TimelineScreen()
                 Tab.People -> ContactsTab(repo)
                 Tab.Recording -> RecordingScreen(
                     activity = activity, repo = repo, speakers = speakers,
diff --git a/lifelog-recorder/app/src/main/kotlin/com/lemon/lifelog/TimelineScreen.kt b/lifelog-recorder/app/src/main/kotlin/com/lemon/lifelog/TimelineScreen.kt
new file mode 100644
index 0000000..6d8e081
--- /dev/null
+++ b/lifelog-recorder/app/src/main/kotlin/com/lemon/lifelog/TimelineScreen.kt
@@ -0,0 +1,377 @@
+package com.lemon.lifelog
+
+import android.app.Application
+import android.net.Uri
+import androidx.compose.foundation.background
+import androidx.compose.foundation.horizontalScroll
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import coil.compose.AsyncImage
+import coil.request.ImageRequest
+import com.lemon.lifelog.data.Moment
+import com.lemon.lifelog.data.Person
+import com.lemon.lifelog.data.PhotoRow
+import com.lemon.lifelog.data.Repository
+import com.lemon.lifelog.data.SegmentRow
+import com.lemon.lifelog.data.WechatMessage
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.stateIn
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+
+// ─── 数据模型 ───────────────────────────────────────────────────────────────
+
+sealed class TimelineItem {
+    abstract val ts: Long
+
+    data class Voice(val segId: Long, override val ts: Long,
+                     val personName: String?, val text: String) : TimelineItem()
+
+    data class WeChat(val id: Long, override val ts: Long,
+                      val personName: String?, val content: String,
+                      val isSend: Boolean) : TimelineItem()
+
+    data class Moment(val id: Long, override val ts: Long,
+                      val personName: String?, val text: String) : TimelineItem()
+
+    data class Photo(val id: Long, override val ts: Long,
+                     val path: String, val caption: String?,
+                     val faceCount: Int) : TimelineItem()
+}
+
+enum class TlSource(val label: String, val icon: String) {
+    VOICE("录音", "🎙"),
+    WECHAT("微信", "💬"),
+    MOMENT("朋友圈", "👥"),
+    PHOTO("照片", "📷"),
+}
+
+// ─── ViewModel ──────────────────────────────────────────────────────────────
+
+class TimelineViewModel(app: Application) : AndroidViewModel(app) {
+    private val repo = Repository(app)
+
+    val items = combine(
+        repo.segments.observeTimeline(300),
+        repo.wechatMessages.observeRecent(300),
+        repo.moments.observeRecent(300),
+        repo.photos.observeGrid(300),
+        repo.persons.observeAll(),
+    ) { segs: List<SegmentRow>, msgs: List<WechatMessage>, moments: List<Moment>,
+        photos: List<PhotoRow>, persons: List<Person> ->
+
+        val wxMap = persons.mapNotNull { p ->
+            val ref = p.contactRef ?: return@mapNotNull null
+            if (!ref.startsWith("wechat:")) return@mapNotNull null
+            ref.removePrefix("wechat:") to p.name
+        }.toMap()
+
+        buildList {
+            segs.forEach { s ->
+                val t = s.text?.takeIf { it.isNotBlank() } ?: return@forEach
+                add(TimelineItem.Voice(s.id, s.startTs, s.speakerName ?: s.personName, t))
+            }
+            msgs.forEach { m ->
+                if (m.content.isBlank()) return@forEach
+                add(TimelineItem.WeChat(m.id, m.createTime, wxMap[m.talker], m.content, m.isSend))
+            }
+            moments.forEach { m ->
+                if (m.text.isBlank()) return@forEach
+                add(TimelineItem.Moment(m.id, m.createTime, wxMap[m.userName] ?: m.userName, m.text))
+            }
+            photos.filter { it.scanState >= 1 || it.faceCount > 0 || !it.caption.isNullOrBlank() }
+                .forEach { p ->
+                    add(TimelineItem.Photo(p.id, p.takenTs, p.path, p.caption, p.faceCount))
+                }
+        }.sortedByDescending { it.ts }
+    }.stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), emptyList())
+}
+
+// ─── 辅助：带日期分隔头的扁平列表 ─────────────────────────────────────────
+
+private sealed class TlEntry {
+    data class Header(val label: String) : TlEntry()
+    data class Event(val item: TimelineItem) : TlEntry()
+}
+
+private val dayFmt  = SimpleDateFormat("yyyy-MM-dd", Locale.getDefault())
+private val lblFmt  = SimpleDateFormat("M月d日", Locale.CHINESE)
+private val timeFmt = SimpleDateFormat("HH:mm", Locale.getDefault())
+
+private fun buildEntries(items: List<TimelineItem>): List<TlEntry> {
+    val result = mutableListOf<TlEntry>()
+    var lastDay = ""
+    val today     = dayFmt.format(System.currentTimeMillis())
+    val yesterday = dayFmt.format(System.currentTimeMillis() - 86_400_000L)
+    for (item in items) {
+        val day = dayFmt.format(Date(item.ts))
+        if (day != lastDay) {
+            result += TlEntry.Header(when (day) {
+                today     -> "今天"
+                yesterday -> "昨天"
+                else      -> lblFmt.format(Date(item.ts))
+            })
+            lastDay = day
+        }
+        result += TlEntry.Event(item)
+    }
+    return result
+}
+
+// ─── Screen ─────────────────────────────────────────────────────────────────
+
+@Composable
+fun TimelineScreen() {
+    val vm: TimelineViewModel = viewModel()
+    val allItems by vm.items.collectAsState()
+
+    var activeFilters by remember { mutableStateOf(TlSource.entries.toSet()) }
+
+    val filtered = remember(allItems, activeFilters) {
+        allItems.filter { item ->
+            when (item) {
+                is TimelineItem.Voice  -> TlSource.VOICE  in activeFilters
+                is TimelineItem.WeChat -> TlSource.WECHAT in activeFilters
+                is TimelineItem.Moment -> TlSource.MOMENT in activeFilters
+                is TimelineItem.Photo  -> TlSource.PHOTO  in activeFilters
+            }
+        }
+    }
+
+    val entries = remember(filtered) { buildEntries(filtered) }
+
+    Column(Modifier.fillMaxSize()) {
+        // 过滤 chips
+        Row(
+            modifier = Modifier
+                .horizontalScroll(rememberScrollState())
+                .padding(horizontal = 12.dp, vertical = 6.dp),
+            horizontalArrangement = Arrangement.spacedBy(8.dp),
+        ) {
+            val allOn = activeFilters.size == TlSource.entries.size
+            FilterChip(
+                selected = allOn,
+                onClick = {
+                    activeFilters =
+                        if (allOn) emptySet() else TlSource.entries.toSet()
+                },
+                label = { Text("全部") },
+            )
+            TlSource.entries.forEach { src ->
+                FilterChip(
+                    selected = src in activeFilters,
+                    onClick = {
+                        activeFilters =
+                            if (src in activeFilters) activeFilters - src
+                            else activeFilters + src
+                    },
+                    label = { Text("${src.icon} ${src.label}") },
+                )
+            }
+        }
+
+        if (entries.isEmpty()) {
+            Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+                Text("暂无记录", color = MaterialTheme.colorScheme.onSurfaceVariant)
+            }
+        } else {
+            LazyColumn(
+                modifier = Modifier.fillMaxSize(),
+                contentPadding = PaddingValues(horizontal = 12.dp, vertical = 4.dp),
+                verticalArrangement = Arrangement.spacedBy(2.dp),
+            ) {
+                items(
+                    entries,
+                    key = { e ->
+                        when (e) {
+                            is TlEntry.Header -> "h_${e.label}"
+                            is TlEntry.Event  -> when (val i = e.item) {
+                                is TimelineItem.Voice  -> "v_${i.segId}"
+                                is TimelineItem.WeChat -> "w_${i.id}"
+                                is TimelineItem.Moment -> "mo_${i.id}"
+                                is TimelineItem.Photo  -> "p_${i.id}"
+                            }
+                        }
+                    },
+                ) { entry ->
+                    when (entry) {
+                        is TlEntry.Header -> TlDateHeader(entry.label)
+                        is TlEntry.Event  -> TlEventRow(entry.item)
+                    }
+                }
+            }
+        }
+    }
+}
+
+// ─── 子组件 ──────────────────────────────────────────────────────────────────
+
+@Composable
+private fun TlDateHeader(label: String) {
+    Text(
+        text = label,
+        style = MaterialTheme.typography.labelMedium,
+        color = MaterialTheme.colorScheme.onSurfaceVariant,
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(top = 14.dp, bottom = 4.dp, start = 4.dp),
+    )
+}
+
+private data class SrcStyle(val icon: String, val color: Color)
+
+private fun srcStyle(item: TimelineItem) = when (item) {
+    is TimelineItem.Voice  -> SrcStyle("🎙", Color(0xFF7C4DFF))
+    is TimelineItem.WeChat -> SrcStyle("💬", Color(0xFF43A047))
+    is TimelineItem.Moment -> SrcStyle("👥", Color(0xFF1E88E5))
+    is TimelineItem.Photo  -> SrcStyle("📷", Color(0xFFFF9800))
+}
+
+@Composable
+private fun TlEventRow(item: TimelineItem) {
+    val (icon, color) = srcStyle(item)
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp),
+        horizontalArrangement = Arrangement.spacedBy(8.dp),
+        verticalAlignment = Alignment.Top,
+    ) {
+        // 左侧：图标 + 时间
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            modifier = Modifier.width(44.dp).padding(top = 2.dp),
+        ) {
+            Box(
+                Modifier
+                    .size(28.dp)
+                    .background(color.copy(alpha = 0.15f), CircleShape),
+                contentAlignment = Alignment.Center,
+            ) {
+                Text(icon, fontSize = 14.sp)
+            }
+            Text(
+                timeFmt.format(Date(item.ts)),
+                style = MaterialTheme.typography.labelSmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(top = 2.dp),
+            )
+        }
+
+        // 右侧：内容卡片
+        Surface(
+            modifier = Modifier.weight(1f),
+            shape = RoundedCornerShape(8.dp),
+            color = MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.55f),
+        ) {
+            Column(Modifier.padding(horizontal = 10.dp, vertical = 6.dp)) {
+                // 人名标签
+                val name: String? = when (item) {
+                    is TimelineItem.Voice  -> item.personName
+                    is TimelineItem.WeChat -> if (item.isSend) "我" else item.personName
+                    is TimelineItem.Moment -> item.personName
+                    is TimelineItem.Photo  -> null
+                }
+                if (name != null) {
+                    Text(
+                        name,
+                        style = MaterialTheme.typography.labelSmall,
+                        color = color,
+                        fontWeight = FontWeight.SemiBold,
+                        modifier = Modifier.padding(bottom = 2.dp),
+                    )
+                }
+
+                // 正文
+                when (item) {
+                    is TimelineItem.Voice -> Text(
+                        item.text,
+                        style = MaterialTheme.typography.bodySmall,
+                        maxLines = 2,
+                        overflow = TextOverflow.Ellipsis,
+                    )
+                    is TimelineItem.WeChat -> Text(
+                        item.content,
+                        style = MaterialTheme.typography.bodySmall,
+                        maxLines = 2,
+                        overflow = TextOverflow.Ellipsis,
+                    )
+                    is TimelineItem.Moment -> Text(
+                        item.text,
+                        style = MaterialTheme.typography.bodySmall,
+                        maxLines = 3,
+                        overflow = TextOverflow.Ellipsis,
+                    )
+                    is TimelineItem.Photo -> {
+                        val ctx = LocalContext.current
+                        AsyncImage(
+                            model = ImageRequest.Builder(ctx)
+                                .data(
+                                    if (item.path.startsWith("content://"))
+                                        Uri.parse(item.path)
+                                    else File(item.path)
+                                )
+                                .crossfade(true)
+                                .size(600)
+                                .build(),
+                            contentDescription = null,
+                            contentScale = ContentScale.Crop,
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .height(96.dp)
+                                .clip(RoundedCornerShape(4.dp)),
+                        )
+                        if (!item.caption.isNullOrBlank()) {
+                            Text(
+                                item.caption,
+                                style = MaterialTheme.typography.bodySmall,
+                                maxLines = 2,
+                                overflow = TextOverflow.Ellipsis,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                modifier = Modifier.padding(top = 4.dp),
+                            )
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/lifelog-recorder/app/src/main/kotlin/com/lemon/lifelog/data/Daos.kt b/lifelog-recorder/app/src/main/kotlin/com/lemon/lifelog/data/Daos.kt
index bca960b..36d97ed 100644
--- a/lifelog-recorder/app/src/main/kotlin/com/lemon/lifelog/data/Daos.kt
+++ b/lifelog-recorder/app/src/main/kotlin/com/lemon/lifelog/data/Daos.kt
@@ -875,6 +875,10 @@ interface MomentDao {
     /** 全库关键词搜索朋友圈文字。 */
     @Query("SELECT * FROM moments WHERE text LIKE '%' || :q || '%' ORDER BY createTime DESC LIMIT :n")
     suspend fun searchText(q: String, n: Int): List<Moment>
+
+    /** 时间轴用：最近 n 条朋友圈（所有人混排）。 */
+    @Query("SELECT * FROM moments ORDER BY createTime DESC LIMIT :n")
+    fun observeRecent(n: Int): Flow<List<Moment>>
 }
 
 @Dao
@@ -911,6 +915,10 @@ interface WechatMessageDao {
         ORDER BY createTime DESC LIMIT :n
     """)
     suspend fun searchGroup(q: String, n: Int): List<WechatMessage>
+
+    /** 时间轴用：最近 n 条私聊（排除群聊）。 */
+    @Query("SELECT * FROM wechat_messages WHERE talker NOT LIKE '%@chatroom' ORDER BY createTime DESC LIMIT :n")
+    fun observeRecent(n: Int): Flow<List<WechatMessage>>
 }
 
 @Dao
diff --git a/lifelog-recorder/app/src/main/res/drawable/ic_launcher_background.xml b/lifelog-recorder/app/src/main/res/drawable/ic_launcher_background.xml
index 688d062..a6391a7 100644
--- a/lifelog-recorder/app/src/main/res/drawable/ic_launcher_background.xml
+++ b/lifelog-recorder/app/src/main/res/drawable/ic_launcher_background.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android">
     <gradient
-        android:startColor="#C62828"
-        android:endColor="#FF5252"
+        android:startColor="#0F0A25"
+        android:endColor="#5B0EA6"
         android:type="linear"
         android:angle="315"/>
 </shape>
diff --git a/lifelog-recorder/app/src/main/res/drawable/ic_launcher_foreground.xml b/lifelog-recorder/app/src/main/res/drawable/ic_launcher_foreground.xml
index f28d3c1..9481f58 100644
--- a/lifelog-recorder/app/src/main/res/drawable/ic_launcher_foreground.xml
+++ b/lifelog-recorder/app/src/main/res/drawable/ic_launcher_foreground.xml
@@ -1,8 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  人际关系网络图标（108×108dp viewport，safe zone 18–90）
-  布局：中央大节点（"我"）+ 4个卫星节点（上/右/下/左），白色连线+节点，
-  中央节点内嵌红色人物轮廓（圆形头 + 肩线），卫星节点为纯白圆。
+  Life OS 图标（108×108dp viewport，safe zone 18–90）
+  布局：中央白圆盘（紫色人物轮廓）+ 两圈同心轨道环（白色半透明）
+       + 对角两颗卫星节点（白色实心圆）
+  隐喻：你是中心，Memory/Relationship/Goal/Execution 各层围绕你运转
 -->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="108dp"
@@ -10,90 +11,40 @@
     android:viewportWidth="108"
     android:viewportHeight="108">
 
-    <!-- ── 连线（在节点层之下，白色半透明） ── -->
-    <!-- 中央 → 上 -->
-    <path android:pathData="M54,39 L54,31"
-        android:strokeColor="#FFFFFF" android:strokeWidth="3.5"
-        android:strokeAlpha="0.75" android:strokeLineCap="round"
-        android:fillColor="#00000000"/>
-    <!-- 中央 → 右 -->
-    <path android:pathData="M69,54 L79,54"
-        android:strokeColor="#FFFFFF" android:strokeWidth="3.5"
-        android:strokeAlpha="0.75" android:strokeLineCap="round"
-        android:fillColor="#00000000"/>
-    <!-- 中央 → 下 -->
-    <path android:pathData="M54,69 L54,77"
-        android:strokeColor="#FFFFFF" android:strokeWidth="3.5"
-        android:strokeAlpha="0.75" android:strokeLineCap="round"
-        android:fillColor="#00000000"/>
-    <!-- 中央 → 左 -->
-    <path android:pathData="M39,54 L29,54"
-        android:strokeColor="#FFFFFF" android:strokeWidth="3.5"
-        android:strokeAlpha="0.75" android:strokeLineCap="round"
-        android:fillColor="#00000000"/>
-    <!-- 次级连线：上 → 右（让图更像真实网络） -->
-    <path android:pathData="M62,23 L80,46"
-        android:strokeColor="#FFFFFF" android:strokeWidth="2"
-        android:strokeAlpha="0.45" android:strokeLineCap="round"
-        android:fillColor="#00000000"/>
-    <!-- 次级连线：下 → 左 -->
-    <path android:pathData="M46,85 L28,62"
-        android:strokeColor="#FFFFFF" android:strokeWidth="2"
-        android:strokeAlpha="0.45" android:strokeLineCap="round"
+    <!-- 外轨道环 r=33，细描边，低透明度 -->
+    <path android:pathData="M21,54 A33,33 0 1,0 87,54 A33,33 0 1,0 21,54"
+        android:strokeColor="#FFFFFF"
+        android:strokeWidth="2.5"
+        android:strokeAlpha="0.55"
         android:fillColor="#00000000"/>
 
-    <!-- ── 卫星节点（白色实心圆，r=10） ── -->
-    <!-- 上 -->
-    <path android:pathData="M54,21 m-10,0 a10,10 0 1,0 20,0 a10,10 0 1,0 -20,0"
-        android:fillColor="#FFFFFF"/>
-    <!-- 右 -->
-    <path android:pathData="M89,54 m-10,0 a10,10 0 1,0 20,0 a10,10 0 1,0 -20,0"
-        android:fillColor="#FFFFFF"/>
-    <!-- 下 -->
-    <path android:pathData="M54,87 m-10,0 a10,10 0 1,0 20,0 a10,10 0 1,0 -20,0"
-        android:fillColor="#FFFFFF"/>
-    <!-- 左 -->
-    <path android:pathData="M19,54 m-10,0 a10,10 0 1,0 20,0 a10,10 0 1,0 -20,0"
-        android:fillColor="#FFFFFF"/>
-
-    <!-- 卫星节点内小人（头+肩，红色）以"上"节点为例，其他类似 -->
-    <!-- 上节点人物头 -->
-    <path android:pathData="M54,18 m-3.5,0 a3.5,3.5 0 1,0 7,0 a3.5,3.5 0 1,0 -7,0"
-        android:fillColor="#C62828"/>
-    <!-- 上节点人物肩 -->
-    <path android:pathData="M49,25 C49,22.5 51.2,21 54,21 C56.8,21 59,22.5 59,25 Z"
-        android:fillColor="#C62828"/>
-
-    <!-- 右节点人物头 -->
-    <path android:pathData="M89,51 m-3.5,0 a3.5,3.5 0 1,0 7,0 a3.5,3.5 0 1,0 -7,0"
-        android:fillColor="#C62828"/>
-    <!-- 右节点人物肩 -->
-    <path android:pathData="M84,58 C84,55.5 86.2,54 89,54 C91.8,54 94,55.5 94,58 Z"
-        android:fillColor="#C62828"/>
+    <!-- 内轨道环 r=22，更细，更低透明度 -->
+    <path android:pathData="M32,54 A22,22 0 1,0 76,54 A22,22 0 1,0 32,54"
+        android:strokeColor="#FFFFFF"
+        android:strokeWidth="2"
+        android:strokeAlpha="0.35"
+        android:fillColor="#00000000"/>
 
-    <!-- 下节点人物头 -->
-    <path android:pathData="M54,84 m-3.5,0 a3.5,3.5 0 1,0 7,0 a3.5,3.5 0 1,0 -7,0"
-        android:fillColor="#C62828"/>
-    <!-- 下节点人物肩 -->
-    <path android:pathData="M49,91 C49,88.5 51.2,87 54,87 C56.8,87 59,88.5 59,91 Z"
-        android:fillColor="#C62828"/>
+    <!-- 卫星节点：右上方（约 77,31），在外轨道 45° 位置 -->
+    <path android:pathData="M72,31 A5,5 0 1,0 82,31 A5,5 0 1,0 72,31"
+        android:fillColor="#FFFFFF"
+        android:fillAlpha="0.9"/>
 
-    <!-- 左节点人物头 -->
-    <path android:pathData="M19,51 m-3.5,0 a3.5,3.5 0 1,0 7,0 a3.5,3.5 0 1,0 -7,0"
-        android:fillColor="#C62828"/>
-    <!-- 左节点人物肩 -->
-    <path android:pathData="M14,58 C14,55.5 16.2,54 19,54 C21.8,54 24,55.5 24,58 Z"
-        android:fillColor="#C62828"/>
+    <!-- 卫星节点：左下方（约 31,77），在外轨道 225° 位置 -->
+    <path android:pathData="M26,77 A5,5 0 1,0 36,77 A5,5 0 1,0 26,77"
+        android:fillColor="#FFFFFF"
+        android:fillAlpha="0.9"/>
 
-    <!-- ── 中央大节点（白色实心圆，r=15） ── -->
-    <path android:pathData="M54,54 m-15,0 a15,15 0 1,0 30,0 a15,15 0 1,0 -30,0"
+    <!-- 中央白色圆盘 r=13 -->
+    <path android:pathData="M41,54 A13,13 0 1,0 67,54 A13,13 0 1,0 41,54"
         android:fillColor="#FFFFFF"/>
 
-    <!-- 中央节点内人物头（红色，r=5.5） -->
-    <path android:pathData="M54,49 m-5.5,0 a5.5,5.5 0 1,0 11,0 a5.5,5.5 0 1,0 -11,0"
-        android:fillColor="#C62828"/>
-    <!-- 中央节点内人物肩（红色） -->
-    <path android:pathData="M44,62 C44,57.5 48.5,54.5 54,54.5 C59.5,54.5 64,57.5 64,62 Z"
-        android:fillColor="#C62828"/>
+    <!-- 人物头像（紫色，r=4，中心 54,49）—— 在白圆盘内显示为实色 -->
+    <path android:pathData="M50,49 A4,4 0 1,0 58,49 A4,4 0 1,0 50,49"
+        android:fillColor="#5B0EA6"/>
+
+    <!-- 人物肩膀（紫色曲线，弧形填充） -->
+    <path android:pathData="M46,62 C46,57.5 49.8,55 54,55 C58.2,55 62,57.5 62,62 Z"
+        android:fillColor="#5B0EA6"/>
 
 </vector>
diff --git a/lifelog-recorder/app/src/main/res/values/strings.xml b/lifelog-recorder/app/src/main/res/values/strings.xml
index bd0fa47..ca2ad19 100644
--- a/lifelog-recorder/app/src/main/res/values/strings.xml
+++ b/lifelog-recorder/app/src/main/res/values/strings.xml
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name">Lifelog</string>
+    <string name="app_name">Life OS</string>
 </resources>