feat:增加 token 过期自动跳转登录的逻辑

android/app/build.gradle.kts

@@ -13,11 +13,11 @@ android {
         applicationId = "com.memory.app"
         minSdk = 26
         targetSdk = 35
-        versionCode = 43
-        versionName = "1.5.9"
+        versionCode = 44
+        versionName = "1.6.0"
 
         buildConfigField("String", "API_BASE_URL", "\"https://x.amos.us.kg/api/\"")
-        buildConfigField("int", "VERSION_CODE", "43")
+        buildConfigField("int", "VERSION_CODE", "44")
     }
 
     signingConfigs {

android/app/src/main/java/com/memory/app/MainActivity.kt

@@ -18,6 +18,7 @@ import com.memory.app.data.CredentialsManager
 import com.memory.app.data.ThemeManager
 import com.memory.app.data.ThemeMode
 import com.memory.app.data.UpdateManager
+import com.memory.app.data.api.ApiClient
 import com.memory.app.data.model.User
 import com.memory.app.data.model.VersionInfo
 import com.memory.app.data.repository.AuthRepository
@@ -91,6 +92,20 @@ class MainActivity : ComponentActivity() {
                         isLoggedIn = restored
                     }
 
+                    // 监听 401 事件，自动登出
+                    LaunchedEffect(Unit) {
+                        ApiClient.unauthorizedEvent.collect {
+                            authRepository.logout()
+                            isLoggedIn = false
+                            currentUser = null
+                            android.widget.Toast.makeText(
+                                this@MainActivity,
+                                "登录已过期，请重新登录",
+                                android.widget.Toast.LENGTH_SHORT
+                            ).show()
+                        }
+                    }
+
                     // Check for updates
                     LaunchedEffect(Unit) {
                         updateInfo = updateManager.checkUpdate()

android/app/src/main/java/com/memory/app/data/api/ApiClient.kt

@@ -2,6 +2,8 @@ package com.memory.app.data.api
 
 import com.jakewharton.retrofit2.converter.kotlinx.serialization.asConverterFactory
 import com.memory.app.BuildConfig
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
 import kotlinx.serialization.json.Json
 import okhttp3.MediaType.Companion.toMediaType
 import okhttp3.OkHttpClient
@@ -12,6 +14,10 @@ import java.util.concurrent.TimeUnit
 object ApiClient {
     private var token: String? = null
 
+    // 401 事件流，用于通知 UI 层登出
+    private val _unauthorizedEvent = MutableSharedFlow<Unit>(extraBufferCapacity = 1)
+    val unauthorizedEvent = _unauthorizedEvent.asSharedFlow()
+
     private val json = Json {
         ignoreUnknownKeys = true
         coerceInputValues = true
@@ -27,7 +33,14 @@ object ApiClient {
                 token?.let {
                     request.addHeader("Authorization", "Bearer $it")
                 }
-                chain.proceed(request.build())
+                val response = chain.proceed(request.build())
+                
+                // 检测 401，触发登出事件
+                if (response.code == 401) {
+                    _unauthorizedEvent.tryEmit(Unit)
+                }
+                
+                response
             }
             .addInterceptor(HttpLoggingInterceptor().apply {
                 level = if (BuildConfig.DEBUG) {