Yattee v2 rewrite

Yattee/Views/Player/Gestures/GestureSeekPreviewView.swift

@@ -0,0 +1,73 @@
+//
+//  GestureSeekPreviewView.swift
+//  Yattee
+//
+//  Seek preview overlay shown during drag-to-seek gesture.
+//
+
+#if os(iOS)
+import SwiftUI
+
+/// Preview overlay shown during drag-to-seek gesture.
+/// Shows only the storyboard thumbnail with timestamp overlay.
+struct GestureSeekPreviewView: View {
+    let storyboard: Storyboard?
+    let currentTime: TimeInterval
+    let seekTime: TimeInterval
+    let duration: TimeInterval
+    let storyboardService: StoryboardService
+    let buttonBackground: ButtonBackgroundStyle
+    let theme: ControlsTheme
+    let chapters: [VideoChapter]
+    let isActive: Bool
+
+    @State private var opacity: Double = 0
+
+    var body: some View {
+        Group {
+            // Only show if storyboard is available
+            if let storyboard {
+                SeekPreviewView(
+                    storyboard: storyboard,
+                    seekTime: seekTime,
+                    storyboardService: storyboardService,
+                    buttonBackground: buttonBackground,
+                    theme: theme,
+                    chapters: chapters
+                )
+            }
+        }
+        .opacity(opacity)
+        .onChange(of: isActive) { _, active in
+            withAnimation(.easeInOut(duration: 0.2)) {
+                opacity = active ? 1 : 0
+            }
+        }
+        .onAppear {
+            if isActive {
+                withAnimation(.easeOut(duration: 0.15)) {
+                    opacity = 1
+                }
+            }
+        }
+    }
+}
+
+#Preview {
+    ZStack {
+        Color.black
+
+        GestureSeekPreviewView(
+            storyboard: nil,
+            currentTime: 120,
+            seekTime: 180,
+            duration: 600,
+            storyboardService: StoryboardService(),
+            buttonBackground: .regularGlass,
+            theme: .dark,
+            chapters: [],
+            isActive: true
+        )
+    }
+}
+#endif