Add iOS media placeholders

apps/ios/TeleTuiIOS/Sources/TeleTuiIOSCore/Views.swift

@@ -657,6 +657,9 @@ public struct MessageRow: View {
                         .font(.caption)
                         .foregroundStyle(.secondary)
                 }
+                if let media = message.media {
+                    MediaPlaceholderView(media: media, mediaAlbumId: message.mediaAlbumId)
+                }
                 Text(renderedText)
                     .textSelection(.enabled)
                 if !message.reactions.isEmpty {
@@ -706,6 +709,81 @@ public struct MessageRow: View {
     }()
 }
 
+public struct MediaPlaceholderView: View {
+    public var media: MessageMedia
+    public var mediaAlbumId: Int64?
+
+    public init(media: MessageMedia, mediaAlbumId: Int64? = nil) {
+        self.media = media
+        self.mediaAlbumId = mediaAlbumId
+    }
+
+    public var body: some View {
+        HStack(spacing: 8) {
+            Image(systemName: iconName)
+                .frame(width: 22, height: 22)
+                .foregroundStyle(.blue)
+            VStack(alignment: .leading, spacing: 2) {
+                HStack(spacing: 6) {
+                    Text(title)
+                        .font(.subheadline)
+                    if mediaAlbumId != nil {
+                        Image(systemName: "square.stack.3d.up.fill")
+                            .font(.caption2)
+                            .foregroundStyle(.secondary)
+                    }
+                }
+                Text(detail)
+                    .font(.caption2)
+                    .foregroundStyle(.secondary)
+            }
+            Spacer(minLength: 0)
+        }
+        .padding(8)
+        .background(Color.gray.opacity(0.10), in: RoundedRectangle(cornerRadius: 8))
+    }
+
+    private var iconName: String {
+        switch media {
+        case .photo:
+            "photo"
+        case .voice:
+            "waveform"
+        }
+    }
+
+    private var title: String {
+        switch media {
+        case .photo:
+            "Photo"
+        case .voice:
+            "Voice"
+        }
+    }
+
+    private var detail: String {
+        switch media {
+        case let .photo(photo):
+            "\(photo.width)x\(photo.height) · \(downloadLabel(photo.downloadState))"
+        case let .voice(voice):
+            "\(voice.duration)s · \(downloadLabel(voice.downloadState))"
+        }
+    }
+
+    private func downloadLabel(_ state: MediaDownloadState) -> String {
+        switch state {
+        case .notDownloaded:
+            "not downloaded"
+        case .downloading:
+            "downloading"
+        case .downloaded:
+            "downloaded"
+        case .error:
+            "error"
+        }
+    }
+}
+
 public struct ComposeBar: View {
     @Binding public var text: String
     public var replyTo: Message?