- Implement `OutboxCoalesceTest` to validate coalescing behavior of outbox operations.
- Create `TimeWindowTest` to ensure correct handling of time windows, including edge cases.
- Add `TimerTest` to verify timer functionality, including countdowns, pauses, and progress calculations.
- Introduce `TokenParityTest` to ensure design tokens match between Kotlin and TypeScript sources.
- Implement `RampStepTest` to validate color ramp calculations and mappings for interval kinds.
- Add `AccentTest` to verify system accent behavior and contrast ratios for accessibility compliance.
