I need an end-to-end Android app that lets users create polished videos, photos, and YouTube-ready thumbnails in one place. The video module must allow them to trim or cut clips, layer creative filters/effects, and blend in background music or soundtracks. For photos, the editor should mirror that same ease of use: quick crop or resize, one-tap filters and effects, plus text and sticker overlays for social posts. A lightweight thumbnail maker—drawing on the photo tools above but pre-sized for common platform ratios—rounds out the experience. Please build natively for Android (Kotlin or Java is fine) and keep the UI clean, modern, and touch-friendly. I’ll provide sketches of the layout; you’ll deliver the full source code, compiled APK, and a brief setup/README so I can run the project locally.