# Android Changelog

## 2026-03-08
### Step 1 - Build and app wiring
- Added Android project plugin configuration for Hilt and Kotlin serialization.
- Added dependency repositories and explicit app module include in settings.
- Added app dependencies for Retrofit/OkHttp, DataStore, coroutines, Hilt, and unit testing.
- Enabled INTERNET permission and registered MessengerApplication in manifest.
- Added MessengerApplication with HiltAndroidApp.

### Step 2 - Network/data core + DI
- Fixed DTO/Auth API serialization annotations and endpoint declarations for `/api/v1/auth/login`, `/api/v1/auth/refresh`, `/api/v1/auth/me`.
- Implemented DataStore-based token persistence with a corrected `getTokens()` read path.
- Added auth network stack: bearer interceptor, 401 authenticator with refresh flow and retry guard.
- Added clean-layer contracts and implementations: `domain/common`, `domain/auth`, `data/auth/repository`.
- Wired dependencies with Hilt modules for DataStore, OkHttp/Retrofit, and repository bindings.

### Step 3 - Minimal auth UI and navigation
- Replaced Phase 0 placeholder UI with Compose auth flow (`AuthViewModel` + login screen).
- Added loading/error states for login and startup session restore.
- Added navigation graph: `AuthGraph (login)` to placeholder `Chats` screen after successful auth.
- Implemented automatic session restore on app start using stored tokens.

### Step 4 - Unit tests
- Added `DataStoreTokenRepositoryTest` for token save/read and clear behavior.
- Added `NetworkAuthRepositoryTest` for login success path and 401 -> `InvalidCredentials` error mapping.

### Step 5 - Chat Room models and persistence core
- Added domain chat model (`ChatItem`) for chat list rendering concerns.
- Added Room entities: `chats`, `users_short` with sort-friendly indices.
- Added `ChatDao` with `observeChats()`, `upsertChats()`, and transactional `clearAndReplaceChats()`.
- Added `MessengerDatabase` and Hilt database wiring (`DatabaseModule`).