Polish Nova Android TV and Polaris sync UX

[papi-ux]

Summary

This PR bundles the current Nova Android TV and Polaris sync UX work into a draft review branch.

Changes

• Adds Android TV-oriented polish for Nova library and server library screens, including clearer focus states, card styling, source metadata, and streaming badges.
• Improves Polaris-aware app metadata and sync surfaces so Steam/Lutris/Heroic/manual sources and platform/runtime details are easier to distinguish.
• Adds TV-friendly settings/dialog handling and supporting UI assets for controller/remote navigation.
• Keeps the existing Polaris stream/session plumbing intact while refining the visible UX around it.

Validation

• Built ARM64 debug APK with ./gradlew -PnovaAbis=arm64-v8a :app:assembleNonRoot_gameDebug.
• Ran focused unit/layout checks with ./gradlew :app:testNonRoot_gameDebugUnitTest --tests com.papi.nova.LayoutInflationTest --tests com.papi.nova.utils.UiHelperTvTest.
• Installed and smoke-launched the APK on NVIDIA Shield.
• Installed the APK on Pixel 10 Pro.

Notes

Draft PR for CI and review. The branch is docs/bidirectional-sync-release at commit 8f53dd4.