fix: 阅读界面日夜选项

app/src/main/java/io/legado/app/ui/config/themeConfig/ThemeConfig.kt

@@ -1,5 +1,7 @@
 package io.legado.app.ui.config.themeConfig
 
+import android.os.Handler
+import android.os.Looper
 import androidx.appcompat.app.AppCompatDelegate
 import io.legado.app.constant.EventBus
 import io.legado.app.constant.PreferKey
@@ -53,7 +55,7 @@ object ThemeConfig {
     var appTheme by prefDelegate(PreferKey.appTheme, "0")
 
     var themeMode by prefDelegate(PreferKey.themeMode, "0") {
-        initNightMode()
+        Handler(Looper.getMainLooper()).post { initNightMode() }
     }
 
     fun initNightMode() {