style(ui): 列表项加卡片容器；登出移到设置页底部；按钮改矢量图标

新增 PreferenceCard（BasicComponent 本身无背景/圆角）；抽屉去掉登出、新建与删除改图标按钮；设置页返回改 ChevronBackward、底部新增登出图标。

app/src/main/kotlin/top/yeij/cyrene/ui/chat/ChatHomeScreen.kt

@@ -36,7 +36,11 @@ fun ChatHomeScreen(
     BackHandler(enabled = drawerOpen) { drawerOpen = false }
 
     if (showSettings) {
-        SettingsScreen(container = container, onBack = { showSettings = false })
+        SettingsScreen(
+            container = container,
+            onBack = { showSettings = false },
+            onLogout = onLogout,
+        )
     } else {
         MiuixDrawer(
             open = drawerOpen,
@@ -63,7 +67,6 @@ fun ChatHomeScreen(
                         drawerOpen = false
                         showSettings = true
                     },
-                    onLogout = onLogout,
                 )
             },
         )

app/src/main/kotlin/top/yeij/cyrene/ui/common/PreferenceCard.kt

@@ -0,0 +1,33 @@
+package top.yeij.cyrene.ui.common
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.unit.dp
+import top.yukonga.miuix.kmp.theme.MiuixTheme
+
+/**
+ * Miuix 的 `BasicComponent` / Preference 系列本身**没有背景与圆角**（只是可点击的 Column），
+ * 需要外面包一层卡片容器才能得到 MD3 的「小圆角卡片」外观。
+ *
+ * 页面底色用 `surface`、卡片用 `surfaceContainer`：浅色下 #F7F7F7 对 #FFFFFF，
+ * 深色下 #000000 对 #242424，卡片因此能凸显出来。
+ */
+@Composable
+fun PreferenceCard(
+    modifier: Modifier = Modifier,
+    content: @Composable () -> Unit,
+) {
+    Box(
+        modifier = modifier
+            .fillMaxWidth()
+            .clip(RoundedCornerShape(16.dp))
+            .background(MiuixTheme.colorScheme.surfaceContainer),
+    ) {
+        content()
+    }
+}

app/src/main/kotlin/top/yeij/cyrene/ui/sessions/SessionDrawerContent.kt

@@ -23,12 +23,18 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog
+import top.yeij.cyrene.ui.common.PreferenceCard
 import top.yukonga.miuix.kmp.basic.BasicComponent
+import top.yukonga.miuix.kmp.basic.Icon
+import top.yukonga.miuix.kmp.basic.IconButton
 import top.yukonga.miuix.kmp.basic.Text
 import top.yukonga.miuix.kmp.basic.TextButton
+import top.yukonga.miuix.kmp.icon.MiuixIcons
+import top.yukonga.miuix.kmp.icon.extended.Add
+import top.yukonga.miuix.kmp.icon.extended.Delete
 import top.yukonga.miuix.kmp.theme.MiuixTheme
 
-/** 侧边栏内容：会话列表 + IoT/设置占位 + 登出。列表项统一用 Miuix 的 MD3 圆角卡片。 */
+/** 侧边栏内容：会话列表 + IoT/设置入口。列表项为 MD3 小圆角卡片。 */
 @Composable
 fun ColumnScope.SessionDrawerContent(
     state: SessionsUiState,
@@ -37,7 +43,6 @@ fun ColumnScope.SessionDrawerContent(
     onDelete: (SessionItem) -> Unit,
     onOpenIot: () -> Unit,
     onOpenSettings: () -> Unit,
-    onLogout: () -> Unit,
 ) {
     var pendingDelete by remember { mutableStateOf<SessionItem?>(null) }
 
@@ -53,11 +58,13 @@ fun ColumnScope.SessionDrawerContent(
     Row(
         modifier = Modifier
             .fillMaxWidth()
-            .padding(start = 20.dp, end = 12.dp, bottom = 4.dp),
+            .padding(start = 20.dp, end = 8.dp, bottom = 4.dp),
         verticalAlignment = Alignment.CenterVertically,
     ) {
         Text("会话", style = MiuixTheme.textStyles.subtitle, modifier = Modifier.weight(1f))
-        TextButton("新建", onClick = onCreate)
+        IconButton(onClick = onCreate) {
+            Icon(imageVector = MiuixIcons.Add, contentDescription = "新建会话")
+        }
     }
 
     LazyColumn(
@@ -91,11 +98,9 @@ fun ColumnScope.SessionDrawerContent(
     }
 
     Spacer(Modifier.height(12.dp))
-    DrawerAction("IoT（规划中）", onOpenIot)
+    PreferenceCard { BasicComponent(title = "IoT（规划中）", onClick = onOpenIot) }
     Spacer(Modifier.height(8.dp))
-    DrawerAction("App 设置", onOpenSettings)
-    Spacer(Modifier.height(8.dp))
-    DrawerAction("登出", onLogout)
+    PreferenceCard { BasicComponent(title = "App 设置", onClick = onOpenSettings) }
     Spacer(Modifier.height(16.dp))
 
     pendingDelete?.let { target ->
@@ -119,6 +124,7 @@ private fun SessionRow(
     onClick: () -> Unit,
     onDelete: () -> Unit,
 ) {
+    PreferenceCard {
         BasicComponent(
             title = session.title,
             onClick = onClick,
@@ -128,26 +134,21 @@ private fun SessionRow(
                         text = "✓",
                         style = MiuixTheme.textStyles.main,
                         color = MiuixTheme.colorScheme.primary,
-                    modifier = Modifier.padding(horizontal = 6.dp),
+                        modifier = Modifier.padding(horizontal = 4.dp),
                     )
                 }
                 if (!session.isMain) {
-                Text(
-                    text = "删除",
-                    style = MiuixTheme.textStyles.footnote1,
-                    color = MiuixTheme.colorScheme.error,
-                    modifier = Modifier
-                        .clickable(onClick = onDelete)
-                        .padding(horizontal = 8.dp, vertical = 4.dp),
+                    IconButton(onClick = onDelete) {
+                        Icon(
+                            imageVector = MiuixIcons.Delete,
+                            contentDescription = "删除会话",
+                            tint = MiuixTheme.colorScheme.error,
                         )
                     }
+                }
             },
         )
-}
-
-@Composable
-private fun DrawerAction(label: String, onClick: () -> Unit) {
-    BasicComponent(title = label, onClick = onClick)
+    }
 }
 
 @Composable

app/src/main/kotlin/top/yeij/cyrene/ui/settings/SettingsScreen.kt

@@ -1,5 +1,6 @@
 package top.yeij.cyrene.ui.settings
 
+import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
@@ -21,11 +22,16 @@ import top.yeij.cyrene.BuildConfig
 import top.yeij.cyrene.app.AppContainer
 import top.yeij.cyrene.core.prefs.AppPrefs
 import top.yeij.cyrene.core.prefs.ThemeMode
+import top.yeij.cyrene.ui.common.PreferenceCard
 import top.yukonga.miuix.kmp.basic.BasicComponent
+import top.yukonga.miuix.kmp.basic.Icon
+import top.yukonga.miuix.kmp.basic.IconButton
 import top.yukonga.miuix.kmp.basic.Scaffold
 import top.yukonga.miuix.kmp.basic.SmallTopAppBar
 import top.yukonga.miuix.kmp.basic.Text
-import top.yukonga.miuix.kmp.basic.TextButton
+import top.yukonga.miuix.kmp.icon.MiuixIcons
+import top.yukonga.miuix.kmp.icon.extended.Back
+import top.yukonga.miuix.kmp.icon.extended.ChevronBackward
 import top.yukonga.miuix.kmp.preference.SwitchPreference
 import top.yukonga.miuix.kmp.theme.MiuixTheme
 
@@ -33,6 +39,7 @@ import top.yukonga.miuix.kmp.theme.MiuixTheme
 fun SettingsScreen(
     container: AppContainer,
     onBack: () -> Unit,
+    onLogout: () -> Unit = {},
 ) {
     val prefs by container.appSettings.data.collectAsState(initial = AppPrefs())
     val scope = rememberCoroutineScope()
@@ -42,7 +49,11 @@ fun SettingsScreen(
         topBar = {
             SmallTopAppBar(
                 title = "App 设置",
-                navigationIcon = { TextButton("返回", onClick = onBack) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(imageVector = MiuixIcons.ChevronBackward, contentDescription = "返回")
+                    }
+                },
             )
         },
     ) { padding ->
@@ -54,44 +65,77 @@ fun SettingsScreen(
         ) {
             SectionTitle("外观")
             ThemeMode.entries.forEach { mode ->
-                ThemeOption(
-                    label = mode.label(),
-                    selected = prefs.themeMode == mode,
+                PreferenceCard {
+                    BasicComponent(
+                        title = mode.label(),
                         onClick = { scope.launch { settings.setThemeMode(mode) } },
+                        endActions = {
+                            if (prefs.themeMode == mode) {
+                                Text(
+                                    text = "✓",
+                                    style = MiuixTheme.textStyles.main,
+                                    color = MiuixTheme.colorScheme.primary,
                                 )
+                            }
+                        },
+                    )
+                }
                 Spacer(Modifier.height(8.dp))
             }
 
             SectionTitle("聊天")
+            PreferenceCard {
                 SwitchPreference(
                     title = "显示旁白",
                     summary = "以灰斜体小字显示 <action> / <narration>",
                     checked = prefs.showNarration,
                     onCheckedChange = { scope.launch { settings.setShowNarration(it) } },
                 )
+            }
             Spacer(Modifier.height(8.dp))
+            PreferenceCard {
                 SwitchPreference(
                     title = "思维链默认展开",
                     summary = "流式期间展开思维链，结束后自动折叠",
                     checked = prefs.thinkingExpanded,
                     onCheckedChange = { scope.launch { settings.setThinkingExpanded(it) } },
                 )
+            }
 
             SectionTitle("关于")
-            Row(
-                modifier = Modifier
-                    .fillMaxWidth()
-                    .padding(horizontal = 20.dp, vertical = 14.dp),
-                verticalAlignment = Alignment.CenterVertically,
-            ) {
-                Text("版本", style = MiuixTheme.textStyles.main, modifier = Modifier.weight(1f))
+            PreferenceCard {
+                BasicComponent(
+                    title = "版本",
+                    summary = null,
+                    endActions = {
                         Text(
                             text = "${BuildConfig.VERSION_NAME} (${BuildConfig.VERSION_CODE})",
                             style = MiuixTheme.textStyles.footnote1,
                             color = MiuixTheme.colorScheme.onSurfaceVariantSummary,
                         )
+                    },
+                )
             }
-            Spacer(Modifier.height(24.dp))
+
+            Spacer(Modifier.height(32.dp))
+            PreferenceCard {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(vertical = 8.dp),
+                    horizontalArrangement = Arrangement.Center,
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    IconButton(onClick = onLogout) {
+                        Icon(
+                            imageVector = MiuixIcons.Back,
+                            contentDescription = "登出",
+                            tint = MiuixTheme.colorScheme.error,
+                        )
+                    }
+                }
+            }
+            Spacer(Modifier.height(32.dp))
         }
     }
 }
@@ -106,27 +150,6 @@ private fun SectionTitle(text: String) {
     )
 }
 
-@Composable
-private fun ThemeOption(
-    label: String,
-    selected: Boolean,
-    onClick: () -> Unit,
-) {
-    BasicComponent(
-        title = label,
-        onClick = onClick,
-        endActions = {
-            if (selected) {
-                Text(
-                    text = "✓",
-                    style = MiuixTheme.textStyles.main,
-                    color = MiuixTheme.colorScheme.primary,
-                )
-            }
-        },
-    )
-}
-
 private fun ThemeMode.label(): String = when (this) {
     ThemeMode.System -> "跟随系统"
     ThemeMode.Light -> "浅色"