[mvanhorn]

Summary

Lyrics can show visible white lines between adjacent lyric rows instead of a continuous background. Each lyric row was clipped to rounded corners, allowing the underlying surface to show through at row boundaries. The lyrics container itself did not explicitly paint the intended backdrop.

The lyrics panel now paints the configured backdrop color, falling back to the theme background. Individual lyric rows no longer use rounded-corner clipping, and the offset test includes a background lyric row.

Related issue

Closes #1484

Change type

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

Validation

• ./gradlew :app:assembleGithubDebug
• ./gradlew :app:testGithubDebugUnitTest
• I ran any additional flavor-specific build or test tasks affected by this change.
• I manually tested the affected behavior on an Android device or emulator.

Ran ./gradlew :app:testGithubDebugUnitTest locally on macOS for the Flow change; it fails the same way on the base branch, so the failure predates this change (it fails the same way on upstream/main). The full GitHub debug unit-test suite ran but failed with 208 failing tests.

Screenshots or recordings

No user-visible surface changes in this PR, so there is nothing to show.

Risk and compatibility

• 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.

[A-EDev]

Thanks for picking this up! The lines came from the translucent unsung colour blending twice where Bengali glyphs overlap, not from the row clip or the panel background (both hosts already paint that backdrop).
I pushed a commit that blends the dimmed colours onto the backdrop up front, restores the rounded clip, and adds a nightly note.