add onboarding tutorial + icon

Pocket Poster/Views/OnBoarding/OnBoardingCardButtons.swift

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+//
+//  OnBoardingCardButtons.swift
+//  Pocket Poster
+//
+//  Created by lemin on 5/31/25.
+//
+
+import SwiftUI
+
+struct OnBoardingCardButtons: View {
+    @AppStorage("finishedTutorial") var finishedTutorial: Bool?
+    
+    @Binding var idx: Int
+    @Binding var isAnimating: Bool
+    
+    var showDismiss: Bool
+    var showFinish: Bool
+    
+    var body: some View {
+        HStack {
+            // MARK: Dismiss Button
+            if showDismiss {
+                Button(action: {
+                    playFinishAnimation()
+                }) {
+                    HStack(spacing: 8) {
+                        Image(systemName: "x.circle")
+                            .imageScale(.large)
+                        
+                        Text("Skip")
+                    }
+                    .padding(.horizontal, 16)
+                    .padding(.vertical, 10)
+                    .background(
+                        Capsule().strokeBorder(Color.white, lineWidth: 1.25)
+                    )
+                }
+                .accentColor(Color.white)
+                .accessibilityIdentifier("OnBoardingSkip")
+            }
+            
+            // MARK: Next Button
+            Button(action: {
+                if showFinish {
+                    playFinishAnimation()
+                } else {
+                    // move to next
+                    isAnimating = false
+                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.5, execute: {
+                        idx += 1
+                        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1, execute: {
+                            isAnimating = true
+                        })
+                    })
+                }
+            }) {
+                HStack(spacing: 8) {
+                    Text(showFinish ? "Finish" : "Next")
+
+                    Image(systemName: showFinish ? "checkmark.circle" : "arrow.right.circle")
+                        .imageScale(.large)
+                }
+                .padding(.horizontal, 16)
+                .padding(.vertical, 10)
+                .background(
+                    Capsule().strokeBorder(Color.white, lineWidth: 1.25)
+                )
+            }
+            .accentColor(Color.white)
+            .accessibilityIdentifier("OnBoardingNext")
+        }
+    }
+    
+    func playFinishAnimation() {
+        isAnimating = false
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.5, execute: {
+            finishedTutorial = true
+        })
+    }
+}
+
+struct OnBoardingCardView: View {
+    var info: OnBoardingPage
+    var pageCount: Int
+    @Binding var idx: Int
+    
+    @State private var isAnimating: Bool = false
+    @State private var imgCornerRadius: CGFloat = 10.0
+    
+    var body: some View {
+        VStack(spacing: 20) {
+            // Image
+            Image(info.image)
+                .resizable()
+                .scaledToFit()
+                .clipShape(RoundedRectangle(cornerRadius: imgCornerRadius))
+                .shadow(color: Color(red: 0, green: 0, blue: 0, opacity: 0.15), radius: 8, x: 6, y: 8)
+                .scaleEffect(isAnimating ? 1.0 : 0.6)
+            
+            // Title
+            Text(info.title)
+                .foregroundColor(Color.white)
+                .multilineTextAlignment(.center)
+                .font(.largeTitle)
+                .fontWeight(.heavy)
+                .shadow(color: Color(red: 0, green: 0, blue: 0, opacity: 0.15), radius: 2, x: 2, y: 2)
+            
+            // Description
+            Text(info.description)
+                .foregroundColor(Color.white)
+                .multilineTextAlignment(.center)
+                .padding(.horizontal, 16)
+                .frame(maxWidth: 480)
+            
+            // Link Button
+            if let url = info.link, let linkName = info.linkName {
+                Link(destination: url) {
+                    HStack(spacing: 8) {
+                        Image(systemName: "link.circle")
+                            .imageScale(.large)
+                        
+                        Text(linkName)
+                    }
+                    .padding(.horizontal, 16)
+                    .padding(.vertical, 10)
+                    .background(
+                        Capsule().strokeBorder(Color.white, lineWidth: 1.25)
+                    )
+                }
+                .accentColor(Color.white)
+            }
+            
+            OnBoardingCardButtons(idx: $idx, isAnimating: $isAnimating, showDismiss: idx == 0, showFinish: idx == pageCount-1)
+        }
+        .opacity(isAnimating ? 1.0 : 0.0)
+        .animation(.easeOut(duration: 0.5), value: isAnimating)
+        .onAppear {
+            isAnimating = true
+        }
+        .padding(.horizontal, 20)
+        .padding(.vertical, 25)
+        .frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity, alignment: .center)
+        .background(LinearGradient(gradient: Gradient(colors: info.gradientColors), startPoint: .top, endPoint: .bottom).ignoresSafeArea())
+    }
+}

Pocket Poster/Views/OnBoarding/OnBoardingPage.swift

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+//
+//  OnBoardingPage.swift
+//  Pocket Poster
+//
+//  Created by lemin on 5/31/25.
+//
+
+import SwiftUICore
+
+struct OnBoardingPage: Identifiable {
+    var id = UUID()
+    var title: String
+    var description: String
+    var image: String
+    var link: URL?
+    var linkName: String?
+    var gradientColors: [Color]
+    
+    init(title: String, description: String, image: String, link: URL? = nil, linkName: String? = nil, gradientColors: [Color] = [Color("WelcomeLight"), Color("WelcomeDark")]) {
+        self.id = UUID()
+        self.title = title
+        self.description = description
+        self.image = image
+        self.link = link
+        self.linkName = linkName
+        self.gradientColors = gradientColors
+    }
+}
+
+let onBoardingCards: [OnBoardingPage] = [
+    .init(
+        title: "Welcome to Pocket Poster!",
+        description: "Here is a tutorial to help you get started with the app.",
+        image: "Logo"
+    ),
+    .init(
+        title: "Install the Shortcut",
+        description: "To apply, you will need a shortcut that opens PosterBoard.",
+        image: "Shortcuts",
+        link: URL(string: "https://www.icloud.com/shortcuts/9035ef1d51c247dba8c9861dc10b4aa7"),
+        linkName: "Get Shortcut"
+    ),
+    .init(
+        title: "Install Nugget",
+        description: "To get the app bundle id, Nugget is required.\n\nOn your computer, download Nugget from the GitHub.",
+        image: "Nugget",
+        link: URL(string: "https://github.com/leminlimez/Nugget/releases/latest"),
+        linkName: "Open GitHub"
+    ),
+    .init(
+        title: "Enjoy!",
+        description: "You can find wallpapers on the official Cowabun.ga website.",
+        image: "Cowabunga",
+        link: URL(string: "https://cowabun.ga/wallpapers"),
+        linkName: "Find Wallpapers"
+    )
+]

Pocket Poster/Views/OnBoarding/OnBoardingView.swift

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+//
+//  OnBoardingView.swift
+//  Pocket Poster
+//
+//  Created by lemin on 5/31/25.
+//
+
+import SwiftUI
+
+struct OnBoardingView: View {
+    @State var currentIndex: Int = 0
+    
+    var body: some View {
+        VStack {
+            OnBoardingCardView(info: onBoardingCards[currentIndex], pageCount: onBoardingCards.count, idx: $currentIndex)
+        }
+    }
+}