ui: improve Compose stability and message UI

- Add minute/second abbreviations and kotlin.time-based relative time formatter
- Introduce FastPreview and update previews to use AppTheme with dark/dynamic colors
- Refactor attachments preview grid & waveform to use ImmutableList and reduce recompositions
- Tweak message bubble reply styling and swipe-to-reply animation/haptics
- Add Compose Stability Analyzer plugin and enable it in debug builds
- Cache shared images by sha256 and improve share intent/chooser text
- Minor UX polish (e.g., “No views”) and immutability annotations

core/domain/src/main/kotlin/dev/meloda/fast/domain/GetCurrentAccountUseCase.kt

@@ -6,10 +6,7 @@ import dev.meloda.fast.model.database.AccountEntity
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 
-class GetCurrentAccountUseCase(
-    private val accountsRepository: AccountsRepository
-) {
-
+class GetCurrentAccountUseCase(private val accountsRepository: AccountsRepository) {
     suspend operator fun invoke(): AccountEntity? = withContext(Dispatchers.IO) {
         accountsRepository.getAccountById(UserConfig.currentUserId)
     }

core/domain/src/main/kotlin/dev/meloda/fast/domain/util/ConvoUiMapper.kt

@@ -27,6 +27,8 @@ fun VkConvo.asPresentation(
         monthShort = { resources.getString(R.string.month_short) },
         weekShort = { resources.getString(R.string.week_short) },
         dayShort = { resources.getString(R.string.day_short) },
+        minuteShort = { resources.getString(R.string.minute_short) },
+        secondShort = { resources.getString(R.string.second_short) },
         now = { resources.getString(R.string.time_now) },
     ),
     message = extractMessage(resources, lastMessage, id, peerType),