Fix held D-pad scrolling in nested rows

[rovkinmax]

Task Summary

• Fixes PUB-3 held D-pad scrolling stalls in season/episode lists by making dpadScrollOptimization axis-aware.
• Existing LazyRow call sites now use horizontal mode, so repeated DPAD_UP/DPAD_DOWN no longer activates rapid-scroll suppression inside horizontal rows.
• Rapid-scroll state still resets on key-up and on non-repeat or non-matching key-down events.

Compliance Review

Compliance Review passed with no violations. The reviewed diff is limited to:

• app/src/main/java/com/kino/puber/core/ui/uikit/component/PositionFocusedItemInLazyLayout.kt
• app/src/main/java/com/kino/puber/core/ui/uikit/component/moviesList/VideoGridUIState.kt
• app/src/main/java/com/kino/puber/ui/feature/contentlist/content/SectionRow.kt
• app/src/main/java/com/kino/puber/ui/feature/home/component/HomeScreenContent.kt

No project contracts, version catalogs, Compose stability config, or string resources were changed.

Verification

• git diff --check: passed.
• ./tools/agentw :app:compileDevDebugKotlin --console=plain: BUILD SUCCESSFUL.
• Compliance review confirmed no remaining no-argument dpadScrollOptimization call sites under app/src/main/java.

Known Skipped Checks

• Full visual device verification on a many-season series was not repeated in this PR shipping step. Earlier investigation verified the affected EpisodesPanel / VideoGrid code path and long-press input path, but the local authenticated navigation/search path did not reliably reach a larger series fixture.