UI: the View system & intro to Compose

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RecyclerView and View performance, Navigation, then Compose from scratch: recomposition, state, side effects and interop.

1. RecyclerView, ViewBinding, ConstraintLayout — performance

2. Navigation Component & deep links

3. Compose fundamentals: composables, recomposition, state

4. Compose state management & side effects

5. Compose ↔ View interop & migration

🎯 Stage assignment

Stage project — "the same screen in both worlds" (4-5 hours).

Write the transaction feed twice — in XML and in Compose — and compare:

The XML version: RecyclerView + ListAdapter/DiffUtil + ViewBinding + a ConstraintLayout item.
The Compose version: LazyColumn + key + a state-hoisted item composable.
Bind both to the same ViewModel (StateFlow) — the data layer must not change.
Host the Compose version in a fragment via ComposeView with an explicit ViewCompositionStrategy.
Measure a few updates with Layout Inspector's recomposition counts.

Done when: you have written down the line counts, the readability difference and the 3 problems you hit — that is exactly the migration answer.