fix(copymangas): restore Animetail update compatibility

[ahe-meow]

Summary

• Restore the interceptor ordering required by Animetail so the uncaught-exception handler runs first and response validation follows it.
• Add the legacy SManga suspend adapters used by Animetail and preserve them through shrinking.
• Make manga update handling respect the requested detail/chapter flags and tolerate nullable API fields.

Changes

File	Change
src/zh/copymangas/src/eu/kanade/tachiyomi/extension/zh/copymangas/CopyMangas.kt	Fix interceptor ordering and Animetail update adapters/flag handling.
src/zh/copymangas/src/eu/kanade/tachiyomi/extension/zh/copymangas/CopyMangasDto.kt	Handle nullable manga metadata and chapter groups safely.
src/zh/copymangas/proguard-rules.pro	Keep the public legacy suspend adapters from being removed or renamed.
src/zh/copymangas/build.gradle.kts	Increment versionCode from 57 to 58.

Validation

• git diff --check
• Branch is based directly on upstream main.
• Manually installed the generated APK and verified the affected Animetail library update flow.
• ./gradlew :src:zh:copymangas:lintRelease — attempted locally but blocked during Gradle configuration because the available Java 25 installation does not provide JAVA_COMPILER; no source compilation was reached.

Checklist

• Source name and language are unchanged.
• versionCode was updated.
• The changes were manually reviewed after AI assistance.
• No generated or session files are included.
• This PR contains one focused work unit.

The upstream repository has Issues disabled, so there is no issue number available to reference.