feat: 更新应用配置和导航系统

- 更新AppConfig配置
- 优化AppNavigation导航结构
- 更新MainActivity主活动

app-android/app/src/main/java/com/huaga/life_echo/MainActivity.kt

@@ -18,6 +18,7 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.navigationBars
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.statusBars
 import androidx.compose.foundation.layout.windowInsetsPadding
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.Icon
@@ -59,23 +60,22 @@ class MainActivity : ComponentActivity() {
         // 设置系统栏透明
         WindowCompat.setDecorFitsSystemWindows(window, false)
 
-        // 设置状态栏完全透明
+        // 设置状态栏和导航栏完全透明
         window.statusBarColor = android.graphics.Color.TRANSPARENT
         window.navigationBarColor = android.graphics.Color.TRANSPARENT
 
-        // 设置状态栏控制器，让内容可以延伸到状态栏下方
-        val windowInsetsController = WindowCompat.getInsetsController(window, window.decorView)
-        windowInsetsController.isAppearanceLightStatusBars = !com.huaga.life_echo.ui.settings.AppSettings.darkMode
-        
         setContent {
-            val darkMode = com.huaga.life_echo.ui.settings.AppSettings.darkMode
+            val darkMode = com.huaga.life_echo.ui.settings.AppSettings.rememberDarkMode()
             LifeechoTheme(darkTheme = darkMode) {
-                // 根据主题更新状态栏图标颜色
+                // 根据主题更新系统栏图标颜色
                 androidx.compose.runtime.LaunchedEffect(darkMode) {
                     val windowInsetsController = WindowCompat.getInsetsController(window, window.decorView)
+                    // 亮色主题：深色图标（isAppearanceLightStatusBars = true）
+                    // 暗色主题：浅色图标（isAppearanceLightStatusBars = false）
                     windowInsetsController.isAppearanceLightStatusBars = !darkMode
+                    windowInsetsController.isAppearanceLightNavigationBars = !darkMode
                 }
-                LifeechoApp()
+                LifeechoApp(TokenManager.isLoggedIn)
             }
         }
     }
@@ -84,25 +84,45 @@ class MainActivity : ComponentActivity() {
 @SuppressLint("UnusedMaterial3ScaffoldPaddingParameter")
 @PreviewScreenSizes
 @Composable
-fun LifeechoApp() {
+fun LifeechoApp(initialLoggedIn: Boolean = false) {
+    var isLoggedIn by rememberSaveable { mutableStateOf(initialLoggedIn) }
     val navController = rememberNavController()
     var currentDestination by rememberSaveable { mutableStateOf(AppDestinations.CHAT) }
     
     // 获取当前路由，判断是否显示底部导航栏
     val navBackStackEntry by navController.currentBackStackEntryAsState()
     val currentRoute = navBackStackEntry?.destination?.route
-    val shouldShowBottomBar = currentRoute != null && !currentRoute.startsWith("create_memory")
+
+    // 同步登录状态变化
+    androidx.compose.runtime.LaunchedEffect(TokenManager.isLoggedIn) {
+        isLoggedIn = TokenManager.isLoggedIn
+    }
+
+    // 同步currentDestination与当前路由
+    androidx.compose.runtime.LaunchedEffect(currentRoute) {
+        when (currentRoute) {
+            Screen.ConversationList.route -> currentDestination = AppDestinations.CHAT
+            Screen.MyMemoir.route -> currentDestination = AppDestinations.MEMOIR
+            Screen.Profile.route -> currentDestination = AppDestinations.PROFILE
+        }
+    }
+    
+    // 只在聊天对话选择页面、回忆录页面、我的页面显示底部导航栏
+    val shouldShowBottomBar = currentRoute == Screen.ConversationList.route || 
+                               currentRoute == Screen.MyMemoir.route || 
+                               currentRoute == Screen.Profile.route
 
     Scaffold(
-        modifier = Modifier.fillMaxSize(),
+        modifier = Modifier
+            .fillMaxSize()
+            .windowInsetsPadding(WindowInsets.statusBars),
         bottomBar = {
-            // 底部导航栏 - 只在非聊天详情页显示
+            // 底部导航栏 - 只在特定页面显示
             if (shouldShowBottomBar) {
                 Surface(
                 modifier = Modifier
                     .fillMaxWidth()
-                    .windowInsetsPadding(WindowInsets.navigationBars)
+                    .windowInsetsPadding(WindowInsets.navigationBars),
-                    .padding(bottom = 8.dp),
                 color = MaterialTheme.colorScheme.surface,
                 shape = RoundedCornerShape(topStart = 16.dp, topEnd = 16.dp),
                 shadowElevation = 8.dp
@@ -140,7 +160,17 @@ fun LifeechoApp() {
         }
     ) { paddingValues ->
         Box(modifier = Modifier.padding(paddingValues)) {
-            AppNavigation(navController = navController)
+            AppNavigation(
+                navController = navController,
+                isLoggedIn = isLoggedIn,
+                onLoginSuccess = { isLoggedIn = true },
+                onLogout = {
+                    isLoggedIn = false
+                    navController.navigate(Screen.Login.route) {
+                        popUpTo(0) { inclusive = true }
+                    }
+                }
+            )
         }
     }
 }

app-android/app/src/main/java/com/huaga/life_echo/config/AppConfig.kt

@@ -2,8 +2,8 @@ package com.huaga.life_echo.config
 
 object AppConfig {
     // API 基础 URL（可以从 BuildConfig 或环境变量读取）
-    const val BASE_URL = "http://10.0.2.2:8000"  // Android 模拟器使用 10.0.2.2 访问 localhost
+    const val BASE_URL = "https://lifecho.worldsplats.com"  // Android 模拟器使用 10.0.2.2 访问 localhost
-    const val WS_BASE_URL = "ws://10.0.2.2:8000"
+    const val WS_BASE_URL = "https://lifecho.worldsplats.com"
     
     // 生产环境应该从配置文件或环境变量读取
     // const val BASE_URL = BuildConfig.API_BASE_URL

app-android/app/src/main/java/com/huaga/life_echo/navigation/AppNavigation.kt

@@ -6,15 +6,7 @@ import androidx.navigation.NavType
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.navArgument
-import com.huaga.life_echo.ui.screens.ConversationListScreen
+import com.huaga.life_echo.ui.screens.*
-import com.huaga.life_echo.ui.screens.CreateMemoryScreen
-import com.huaga.life_echo.ui.screens.ExportDataScreen
-import com.huaga.life_echo.ui.screens.LoginScreen
-import com.huaga.life_echo.ui.screens.MyMemoirScreen
-import com.huaga.life_echo.ui.screens.MyOrdersScreen
-import com.huaga.life_echo.ui.screens.ProfileScreen
-import com.huaga.life_echo.ui.screens.RegisterScreen
-import com.huaga.life_echo.ui.screens.UpgradePlanScreen
 
 sealed class Screen(val route: String) {
     object ConversationList : Screen("conversation_list")
@@ -28,13 +20,22 @@ sealed class Screen(val route: String) {
     object UpgradePlan : Screen("upgrade_plan")
     object MyOrders : Screen("my_orders")
     object ExportData : Screen("export_data")
+    object PlanDetails : Screen("plan_details")
+    object FAQ : Screen("faq")
+    object Feedback : Screen("feedback")
+    object About : Screen("about")
 }
 
 @Composable
-fun AppNavigation(navController: NavHostController) {
+fun AppNavigation(
+    navController: NavHostController,
+    isLoggedIn: Boolean = false,
+    onLoginSuccess: () -> Unit = {},
+    onLogout: () -> Unit = {}
+) {
     NavHost(
         navController = navController,
-        startDestination = Screen.ConversationList.route
+        startDestination = if (isLoggedIn) Screen.ConversationList.route else Screen.Login.route
     ) {
         composable(Screen.ConversationList.route) {
             ConversationListScreen(
@@ -68,10 +69,26 @@ fun AppNavigation(navController: NavHostController) {
         composable(Screen.ExportData.route) {
             ExportDataScreen(navController = navController)
         }
+        composable(Screen.PlanDetails.route) {
+            PlanDetailsScreen(navController = navController)
+        }
+        composable(Screen.FAQ.route) {
+            FAQScreen(navController = navController)
+        }
+        composable(Screen.Feedback.route) {
+            FeedbackScreen(navController = navController)
+        }
+        composable(Screen.About.route) {
+            AboutScreen(navController = navController)
+        }
         composable(Screen.Login.route) {
             LoginScreen(
                 onLoginSuccess = {
-                    navController.popBackStack()
+                    // 登录成功后导航到主界面
+                    navController.navigate(Screen.ConversationList.route) {
+                        // 清除登录页面，避免返回
+                        popUpTo(Screen.Login.route) { inclusive = true }
+                    }
                 },
                 onNavigateToRegister = {
                     navController.navigate(Screen.Register.route)