Contributed to the ankidroid/Anki-Android repository by delivering a feature that enhanced the deck search user interface through the introduction of an immutable DisplayDeckNode representation. This work involved refactoring the display pipeline, specifically replacing filterAndFlatten with filterAndFlattenDisplay to operate on immutable nodes, which improved both correctness and maintainability. The update addressed issues with expand and collapse toggles during deck searches, ensuring accurate rendering and eliminating previous visual inconsistencies. The feature was developed collaboratively and focused on robust data structures, UI development, and refactoring, utilizing Java and Kotlin to implement a more reliable and maintainable search experience.