Add app settings with update track and auto-check options

- Add AppSettingsScreen with update track selection and auto-check toggle
- Remove checkUpdateAvailable() as all vendors now support update checking
- Add missing Chinese translations for update-related strings

build.gradle

@@ -11,6 +11,7 @@ plugins {
     id 'com.google.devtools.ksp' version '2.2.0-2.0.2' apply false
     id 'com.github.triplet.play' version '3.12.1' apply false
     id 'org.jetbrains.kotlin.plugin.compose' version '2.2.0' apply false
+    id 'org.jetbrains.kotlin.plugin.serialization' version '2.2.0' apply false
     id 'org.jlleitschuh.gradle.ktlint' version '13.1.0' apply false
     id 'io.gitlab.arturbosch.detekt' version '1.23.8'
 }