fix: 修复房间管理增删改；优化 UI 性能与交互

app/src/main/java/com/example/smarthome/MainActivity.kt

@@ -4,6 +4,9 @@ import android.os.Bundle
 import androidx.activity.ComponentActivity
 import com.example.smarthome.ui.theme.SmartHomeTheme
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.LocalOverscrollConfiguration
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.ViewCompositionStrategy
 import androidx.compose.material3.Surface
@@ -72,6 +75,7 @@ class MainActivity : ComponentActivity() {
     }
 }
 
+@OptIn(ExperimentalFoundationApi::class)
 @Composable
 fun AppRoot() {
     val context = androidx.compose.ui.platform.LocalContext.current
@@ -79,6 +83,8 @@ fun AppRoot() {
     // 监听登录状态
     val isLoggedIn by UserManager.isLoggedIn.collectAsState()
 
+    // 禁用上下滑到边界时的拉伸回弹效果，降低滑动重绘开销
+    CompositionLocalProvider(LocalOverscrollConfiguration provides null) {
         if (!isLoggedIn) {
             // 未登录，显示登录页面
             LoginScreen(
@@ -91,6 +97,7 @@ fun AppRoot() {
             MainContent()
         }
     }
+}
 
 @Composable
 fun MainContent() {

app/src/main/java/com/example/smarthome/ui/MainScaffold.kt

@@ -132,7 +132,8 @@ fun MainScaffold(
                 selectedNavItem = selectedNavItem,
                 onNavItemSelect = onNavItemSelect,
                 modifier = Modifier.fillMaxHeight(),
-                hazeState = hazeState
+                hazeState = hazeState,
+                rooms = rooms
             )
             
             // 间距
@@ -2347,18 +2348,12 @@ fun GlassSidebar(
     selectedNavItem: Int = 0,
     onNavItemSelect: (Int) -> Unit = {},
     modifier: Modifier = Modifier,
-    hazeState: HazeState
+    hazeState: HazeState,
+    rooms: List<String> = listOf("总览", "客厅", "厨房", "卧室", "影音室", "游戏房")
 ) {
 
-    // 房间列表 - 放在总览上面
-    val roomNavItems = listOf(
-        "总览",
-        "客厅",
-        "厨房",
-        "卧室",
-        "影音室",
-        "游戏房"
-    )
+    // 房间列表 - 使用外部传入，支持动态增删改
+    val roomNavItems = rooms
 
     // 导航项列表
     val navItems = listOf(

app/src/main/java/com/example/smarthome/ui/SettingsScreen.kt

@@ -485,6 +485,7 @@ fun SettingsContent(
     onRenameRoom: (Int, String) -> Unit = { _, _ -> }
 ) {
     var showEditRoomsDialog by remember { mutableStateOf(false) }
+    var showAddRoomDialog by remember { mutableStateOf(false) }
 
     Column(
         modifier = Modifier
@@ -517,7 +518,18 @@ fun SettingsContent(
             onDismiss = { showEditRoomsDialog = false },
             onRenameRoom = onRenameRoom,
             onDeleteRoom = onDeleteRoom,
-            onAddRoom = { /* 添加房间通过对话框内的按钮处理 */ }
+            onAddRoom = { showAddRoomDialog = true }
+        )
+    }
+
+    // 添加房间对话框
+    if (showAddRoomDialog) {
+        AddRoomDialog(
+            onDismiss = { showAddRoomDialog = false },
+            onConfirm = { roomName ->
+                onAddRoom(roomName)
+                showAddRoomDialog = false
+            }
         )
     }
 }

app/src/main/res/drawable/ic_add.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>
+</vector>