Task Management Android App

I need an Android application that acts as a focused productivity tool for creating and assigning tasks. The scope is intentionally narrow—no calendar integration or note-taking at this stage—because I want to perfect the core task workflow first.

Core functionality
• A user can create a task, add a short description, and assign it to themselves or another user/contact.
• Tasks should save locally and sync to the cloud when a connection is available (Firebase or your recommended alternative).
• A clean Material Design interface with intuitive add/edit screens and a simple list view of all tasks.

Deliverables
1. Complete Android Studio project (Kotlin or Java) with clear, well-commented code.
2. Release-ready APK and signed app bundle.
3. One-page setup guide covering build, run, and how to change Firebase keys (or chosen backend).

Acceptance criteria
• Creating and assigning a task works on Android 11–14 without crashes.
• All data persists after app restart and re-syncs correctly after an offline period.
• UI follows standard Material Design components and passes basic accessibility checks.