polish iOS study flow

mobile/ios-app/Core/Analytics/AnalyticsClient.swift

@@ -1,13 +1,28 @@
+import Combine
 import Foundation
 
 protocol AnalyticsTracking {
     func track(_ event: String, attributes: [String: String])
 }
 
-final class HermesAnalyticsClient: AnalyticsTracking {
+struct HermesTrackedEvent: Identifiable, Equatable {
+    let id = UUID()
+    let event: String
+    let attributes: [String: String]
+    let timestamp: Date
+}
+
+@MainActor
+final class HermesAnalyticsClient: ObservableObject, AnalyticsTracking {
+    @Published private(set) var trackedEvents: [HermesTrackedEvent] = []
+
     func track(_ event: String, attributes: [String: String]) {
-        // Scaffold implementation.
-        _ = event
-        _ = attributes
+        trackedEvents.append(
+            HermesTrackedEvent(
+                event: event,
+                attributes: attributes,
+                timestamp: Date()
+            )
+        )
     }
 }

mobile/ios-app/Core/DesignSystem/Theme.swift

@@ -115,6 +115,7 @@ struct HermesMetricPill: View {
 struct HermesCountdownBadge: View {
     let label: String
     let value: String
+    var warning: Bool = false
 
     var body: some View {
         VStack(alignment: .leading, spacing: 4) {
@@ -123,11 +124,11 @@ struct HermesCountdownBadge: View {
                 .foregroundStyle(HermesTheme.textTertiary)
             Text(value)
                 .font(.title3.weight(.bold))
-                .foregroundStyle(HermesTheme.accent)
+                .foregroundStyle(warning ? HermesTheme.warning : HermesTheme.accent)
         }
         .padding(.horizontal, 14)
         .padding(.vertical, 12)
-        .background(HermesTheme.accentSoft)
+        .background((warning ? HermesTheme.warning : HermesTheme.accent).opacity(0.16))
         .clipShape(RoundedRectangle(cornerRadius: HermesTheme.insetRadius, style: .continuous))
     }
 }

mobile/ios-app/Core/Media/PlayerCoordinator.swift

@@ -1,7 +1,37 @@
+import AVFoundation
 import Combine
 import Foundation
 
+@MainActor
 final class PlayerCoordinator: ObservableObject {
+    let player: AVPlayer
+
     @Published var isPlaying = false
     @Published var playbackPositionMs: Int = 0
+
+    init(previewURL: URL = URL(string: "https://cdn.example.com/hermes/sample-event/master.m3u8")!) {
+        self.player = AVPlayer(url: previewURL)
+        self.player.actionAtItemEnd = .pause
+    }
+
+    func prepareForPreview() {
+        player.seek(to: .zero)
+        player.play()
+        isPlaying = true
+    }
+
+    func play() {
+        player.play()
+        isPlaying = true
+    }
+
+    func pause() {
+        player.pause()
+        isPlaying = false
+    }
+
+    func restart() {
+        player.seek(to: .zero)
+        play()
+    }
 }

mobile/ios-app/Core/Media/StudyVideoPlayerView.swift

@@ -0,0 +1,18 @@
+import AVKit
+import SwiftUI
+
+struct StudyVideoPlayerView: View {
+    @ObservedObject var coordinator: PlayerCoordinator
+
+    var body: some View {
+        VideoPlayer(player: coordinator.player)
+            .frame(maxWidth: .infinity)
+            .frame(height: 224)
+            .clipShape(RoundedRectangle(cornerRadius: HermesTheme.cornerRadius, style: .continuous))
+            .overlay(
+                RoundedRectangle(cornerRadius: HermesTheme.cornerRadius, style: .continuous)
+                    .stroke(HermesTheme.accent.opacity(0.12), lineWidth: 1)
+            )
+            .background(HermesTheme.surfaceElevated)
+    }
+}

mobile/ios-app/Core/Networking/APIModels.swift

@@ -42,8 +42,8 @@ struct HermesEventMedia: Codable {
     var id: UUID
     var eventId: UUID
     var mediaType: String
-    var hlsMasterURL: URL
-    var posterURL: URL?
+    var hlsMasterUrl: URL
+    var posterUrl: URL?
     var durationMs: Int
     var previewStartMs: Int
     var previewEndMs: Int