[A-EDev]

Summary

• The music home picks each top artist's channel once for the "Similar to" blocks. Top artists were grouped by artist name but seeded by channel, so names like "Artist" and "Artist & Guest" could both seed one channel and repeat the other_performances:<channel> LazyColumn key, which crashed on scroll.
• The music home shelf builder also emits each seed's "Other performances" and "More from" shelves once, so a repeated seed can no longer crash the list.
• The top-artist pick moved into SimilarToSections.topArtistSeeds, with unit tests for two names on one channel and for artists without a channel.

Related issue

Closes #1386

Change type

• Bug fix
• Feature
• Refactor or maintenance
• Build, packaging, or CI
• Documentation

Validation

• ./gradlew :app:assembleGithubDebug
• ./gradlew :app:testGithubDebugUnitTest: 4367 tests, 0 failed
• I ran any additional flavor-specific build or test tasks affected by this change: ./gradlew :app:compileFossDebugKotlin, ./gradlew ktlintCheck, python3 .github/scripts/nightly_notes.py --check
• I manually tested the affected behavior on an Android device or emulator.

Test device and Android version:

Screenshots or recordings

Risk and compatibility

• No preference, database, network or background work changes. When two top artists share a channel, the music home now shows one "Similar to" block for that channel and picks the next artist instead.

• The change does not introduce secrets, private data, or unexpected telemetry.

• New user-facing text uses Android string resources.

• Dependency and lockfile changes are intentional and limited to this PR.

• Room schema changes include the required version bump and migration, or this PR does not change the Room schema.

• Breaking changes and upgrade steps are clearly documented.

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