主视图优化

composeApp/src/androidMain/kotlin/com/taskttl/MainActivity.kt

@@ -16,18 +16,25 @@ class MainActivity : ComponentActivity() {
         enableEdgeToEdge()
 
         // 设置全屏显示
-        WindowCompat.setDecorFitsSystemWindows(window, true)
+        WindowCompat.setDecorFitsSystemWindows(window, false)
 
         // 设置状态栏图标颜色
-        val windowInsetsController = WindowInsetsControllerCompat(window, window.decorView)
+        val controller = WindowInsetsControllerCompat(window, window.decorView)
         // windowInsetsController.hide(WindowInsetsCompat.Type.statusBars() or WindowInsetsCompat.Type.navigationBars())
         // windowInsetsController.systemBarsBehavior =
         //     WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
 
+        // 显示状态栏和导航栏
+        // controller.show(WindowInsetsCompat.Type.systemBars())
+
+        // 设置系统栏行为：用户上滑时再显示（可选）
+        // controller.systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_DEFAULT
+
         // 使用系统原生方法检测暗色主题
         val isDarkTheme = resources.configuration.uiMode and
                 Configuration.UI_MODE_NIGHT_MASK == Configuration.UI_MODE_NIGHT_YES
-        windowInsetsController.isAppearanceLightStatusBars = !isDarkTheme
+        controller.isAppearanceLightStatusBars = isDarkTheme
+        controller.isAppearanceLightNavigationBars = isDarkTheme
 
         setContent {
             App()

composeApp/src/commonMain/kotlin/com/taskttl/core/routes/MainNav.kt

@@ -1,7 +1,9 @@
 package com.taskttl.core.routes
 
 import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.List
@@ -14,6 +16,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
 import androidx.navigation.NavDestination.Companion.hasRoute
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
@@ -22,12 +25,12 @@ import androidx.navigation.compose.rememberNavController
 import androidx.navigation.toRoute
 import com.taskttl.core.routes.Routes.Main
 import com.taskttl.core.ui.CustomBottomBar
+import com.taskttl.presentation.category.CategoryEditScreen
+import com.taskttl.presentation.category.CategoryScreen
 import com.taskttl.presentation.countdown.CountdownDetailScreen
 import com.taskttl.presentation.countdown.CountdownEditScreen
 import com.taskttl.presentation.countdown.CountdownScreen
 import com.taskttl.presentation.settings.AboutScreen
-import com.taskttl.presentation.category.CategoryEditScreen
-import com.taskttl.presentation.category.CategoryScreen
 import com.taskttl.presentation.settings.DataManagementScreen
 import com.taskttl.presentation.settings.FeedbackScreen
 import com.taskttl.presentation.settings.PrivacyScreen
@@ -61,7 +64,8 @@ fun MainNav() {
     val currentDestination by mainNavController.currentBackStackEntryAsState()
 
     Scaffold(
-        modifier = Modifier.background(Color(0xffF9F9F9)),
+        modifier = Modifier.fillMaxSize().background(Color(0xffF9F9F9)),
+        contentWindowInsets = WindowInsets(0.dp),
         bottomBar = {
             CustomBottomBar(
                 bottomItems = bottomItems,
@@ -80,7 +84,8 @@ fun MainNav() {
         }
     ) { paddingValues ->
         NavHost(
-            modifier = Modifier.fillMaxSize().padding(paddingValues),
+            modifier = Modifier.fillMaxSize()
+                .padding(bottom = paddingValues.calculateBottomPadding()),
             navController = mainNavController,
             startDestination = Main.Task
         ) {

composeApp/src/commonMain/kotlin/com/taskttl/core/ui/CustomBottom.kt

@@ -10,6 +10,7 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.material3.Icon
@@ -42,7 +43,7 @@ fun CustomBottomBar(
     val barHeight = 56.dp
 
     Box(
-        modifier = Modifier.fillMaxWidth().height(barHeight)
+        modifier = Modifier.navigationBarsPadding().fillMaxWidth().height(barHeight)
             .background(MaterialTheme.colorScheme.background)
     ) {
         Row(

composeApp/src/commonMain/kotlin/com/taskttl/ui/components/AppHeader.kt

@@ -6,6 +6,7 @@ import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material3.Icon
@@ -53,6 +54,7 @@ fun AppHeader(
         modifier = Modifier
             .fillMaxWidth()
             .background(brush = gradient)
+            .statusBarsPadding()
             .padding(horizontal = 20.dp, vertical = 15.dp),
         horizontalArrangement = Arrangement.SpaceBetween,
         verticalAlignment = Alignment.CenterVertically