[shiaho777]

What changed

The abi flavor dimension had two product flavors, arm64 and universal, whose abiFilters were both arm64-v8a — every release pipeline built each APK twice for identical native libraries. The duplicate is removed and the dimension keeps its single arm64 flavor:

• app/build.gradle.kts and build-logic/convention/.../ImageToolboxLibraryPlugin.kt: the universal flavor block is gone.
• The "universalApi"(libs.com.tencent.mmkv) dependency configuration disappears with the flavor, so that line is removed from the 23 modules that declared it; "arm64Api" is unchanged. Without this the build fails with Configuration with name 'universalApi' not found.
• .github/workflows/android.yml: the abi_flavor input, its default and the matrix are arm64-only, so a tag push produces 7 APKs instead of 14.
• .github/workflows/pr-check.yml: CI assembles :app:assembleFossArm64Debug.
• build_release.sh: ALL_ABIS=("arm64"), and the artifact collection now Pascal-cases the ABI in the directory it looks in. It was reading app/build/outputs/apk/fossarm64/release while AGP writes fossArm64 — the same casing trap the mapping path further down the script already documents, so the script only resolved APKs on a case-insensitive filesystem.
• README.md, README.zh-CN.md, run.md, CONTRIBUTING.md, fastlane/README.md, feature/iching-divination/README.md, and two comments in feature/xiangqi/build.gradle.kts: variant names and the "2 ABIs / 14 APKs" statements updated to the arm64-only names.
• fastlane/push_release.py and scripts/publish_gitcode_release.py: the AAB glob pointed at app/build/outputs/bundle/googleUniversalRelease, a directory that no longer exists after the rename.

How it was verified

• ./gradlew :app:assembleFossArm64Debug — BUILD SUCCESSFUL, APK written to app/build/outputs/apk/fossArm64/debug/.
• ./gradlew :app:assembleFossUniversalDebug — fails with task 'assembleFossUniversalDebug' not found in project ':app', so the old variant is gone rather than aliased.
• ./gradlew :app:assembleFossArm64Debug --dry-run — the full 3820-task graph configures, which is what surfaces bad flavor-scoped configuration names across all modules.
• build_release.sh: bash -n passes, and the collection expression now expands to app/build/outputs/apk/fossArm64, the directory AGP actually produced.
• python3 -m py_compile on both edited scripts.

Not verified: signing, the release android.yml job (needs a tag push) and the Play upload path, none of which run without keys.

[wangzhishou]

Merged manually as squash commit 3c837c6 (the API merge was blocked by a token scope issue, so I'm closing this by hand — your commits are credited via Co-authored-by).

Two things I did on top of your branch before landing it:

• Rebased onto current main.
• Removed one leftover "universalApi"(libs.com.tencent.mmkv) in feature/sudoku/build.gradle.kts — that module landed on main after your branch point, so your diff couldn't have covered it. Without the line removed, configuration fails with Configuration with name 'universalApi' not found.

Verified on the rebased tree: :app:assembleFossArm64Debug --dry-run configures the full graph, and the old assembleFossUniversalDebug task is gone.

Thanks for the cleanup — the halved release matrix is a real win.