NetworkCharacterRepositoryTest swaps a Ktor MockEngine into HttpClientFactory and
covers success mapping (incl. request URL/page-param construction), 404 ->
NOT_FOUND, 500 -> SERVER_ERROR, and malformed body -> SERIALIZATION. That last
case exposed a real bug: Ktor wraps the kotlinx SerializationException in its own
ContentConvertException, so safeCall mapped it to UNKNOWN; safeCall now scans the
cause chain and maps it to SERIALIZATION. Adds an instrumented Compose UI test
(CharacterListScreen) using the chaining CharacterListRobot: rendered items,
empty/error states, and tap -> Action.
Adrian Kuta
d232757eb4