fix(ui): remove PSP purple accent leaks

[papi-ux]

Summary

• Routes legacy XML drawable/layout accent colors through the active theme instead of hardcoded Polaris violet
• Tints refresh spinners, snackbars, notifications, chips, focus rings, banners, and the Nova star through PSP steel-blue accents
• Removes ProgressBar XML theme-attr tints that crash inflate and applies the empty-state spinner tint at runtime

Test Plan

• RED: NovaFocusDrawableTest failed while focus/chip/server-row drawables still used @color/nova_accent
• ./gradlew testDebugUnitTest --tests com.papi.nova.ui.NovaFocusDrawableTest --tests com.papi.nova.grid.KotlinGridAdaptersMigrationTest
• ./gradlew testDebugUnitTest assembleRootDebug lintRootDebug
• grep scan over drawable/color/layout/layout-land/java shows remaining default violet hits only in NovaThemeManager/Compose default Polaris fallback paths
• adb install -r -d -g app/build/outputs/apk/root/debug/app-root-arm64-v8a-debug.apk on Retroid Pocket 6
• forced com.papi.nova.root.debug prefs to nova_theme=portable_chrome
• launched Nova Debug (Root) and verified package version/update time/activity via adb