Chat video messages: add thumbnail preview card with play overlay

android/app/build.gradle.kts

@@ -102,6 +102,7 @@ dependencies {
     implementation("io.coil-kt:coil:2.7.0")
     implementation("io.coil-kt:coil-compose:2.7.0")
     implementation("io.coil-kt:coil-gif:2.7.0")
+    implementation("io.coil-kt:coil-video:2.7.0")
     implementation("androidx.media3:media3-exoplayer:1.4.1")
     implementation("androidx.media3:media3-datasource:1.4.1")
     implementation("androidx.media3:media3-datasource-okhttp:1.4.1")

android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatScreen.kt

@@ -152,6 +152,8 @@ import androidx.compose.material.icons.filled.VisibilityOff
 import androidx.compose.material.icons.automirrored.filled.Reply
 import androidx.compose.material.icons.automirrored.filled.InsertDriveFile
 import coil.compose.AsyncImage
+import coil.request.ImageRequest
+import coil.request.videoFrameMillis
 import ru.daemonlord.messenger.R
 import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.distinctUntilChanged
@@ -2590,6 +2592,14 @@ private fun VideoAttachmentCard(
     fileType: String,
     onOpenViewer: () -> Unit,
 ) {
+    val context = LocalContext.current
+    val previewRequest = remember(url) {
+        ImageRequest.Builder(context)
+            .data(url)
+            .crossfade(true)
+            .videoFrameMillis(1000)
+            .build()
+    }
     Column(
         modifier = Modifier
             .fillMaxWidth()
@@ -2597,13 +2607,41 @@ private fun VideoAttachmentCard(
             .clickable(onClick = onOpenViewer)
             .padding(8.dp),
     ) {
-        Row(
-            verticalAlignment = Alignment.CenterVertically,
-            horizontalArrangement = Arrangement.spacedBy(6.dp),
+        Box(
+            modifier = Modifier
+                .fillMaxWidth()
+                .height(186.dp)
+                .clip(RoundedCornerShape(10.dp)),
         ) {
-            Icon(imageVector = Icons.Filled.Movie, contentDescription = "Video")
-            Text(text = "Video", style = MaterialTheme.typography.labelSmall, fontWeight = FontWeight.SemiBold)
+            AsyncImage(
+                model = previewRequest,
+                contentDescription = stringResource(id = R.string.chat_media_badge_video),
+                modifier = Modifier.fillMaxSize(),
+                contentScale = ContentScale.Crop,
+            )
+            Box(
+                modifier = Modifier
+                    .align(Alignment.Center)
+                    .size(42.dp)
+                    .clip(CircleShape)
+                    .background(Color.Black.copy(alpha = 0.45f)),
+                contentAlignment = Alignment.Center,
+            ) {
+                Icon(
+                    imageVector = Icons.Filled.PlayArrow,
+                    contentDescription = stringResource(id = R.string.chat_media_badge_video),
+                    tint = Color.White,
+                    modifier = Modifier.size(28.dp),
+                )
             }
+            MediaTypeBadge(
+                label = stringResource(id = R.string.chat_media_badge_video),
+                modifier = Modifier
+                    .align(Alignment.BottomStart)
+                    .padding(8.dp),
+            )
+        }
+        Spacer(modifier = Modifier.height(6.dp))
         Text(text = extractFileName(url), style = MaterialTheme.typography.bodySmall, maxLines = 1)
         Text(text = fileType, style = MaterialTheme.typography.labelSmall)
     }