feat(pet): add click-to-pet interaction with bounce, hearts & reactions

Sources/App/PetController.swift

@@ -1,4 +1,4 @@
-import Foundation
+import AppKit
 import AgentPetCore
 
 /// Resolves the aggregate session mood, plays a short `celebrate` burst when
@@ -219,6 +219,58 @@ final class PetController: ObservableObject {
         StatusBarController.shared.refreshTitle()
     }
 
+    // MARK: - Pet tap interaction
+
+    @Published private(set) var isPetted = false
+    @Published private(set) var petReactionLine: String = ""
+    @Published private(set) var petTapCount: Int = 0
+
+    private var petBounceTimer: Timer?
+    private var petLineTimer: Timer?
+    private var petCooldown = false
+    private var consecutivePets = 0
+    private var lastPetTime: Date?
+
+    private static let petReactions: [[String]] = [
+        ["Hehe~", "That tickles!", "Hi there! 👋", "Oh! Hello~", "*purrs*", "Nyaa~"],
+        ["I love you! 💕", "More pets please!", "Best human ever!", "So happy~ ✨"],
+        ["MAXIMUM LOVE! 💖", "Can't stop smiling! 🥰", "I'm gonna melt~"],
+    ]
+
+    func petTap() {
+        guard !petCooldown else { return }
+        petCooldown = true
+
+        let now = Date()
+        if let last = lastPetTime, now.timeIntervalSince(last) < 3.0 {
+            consecutivePets += 1
+        } else {
+            consecutivePets = 1
+        }
+        lastPetTime = now
+
+        let tier = consecutivePets >= 6 ? 2 : consecutivePets >= 3 ? 1 : 0
+        petReactionLine = Self.petReactions[tier].randomElement() ?? "Hehe~"
+        petTapCount += 1
+
+        isPetted = true
+        petBounceTimer?.invalidate()
+        petBounceTimer = Timer.scheduledTimer(withTimeInterval: 0.15, repeats: false) { _ in
+            Task { @MainActor [weak self] in self?.isPetted = false }
+        }
+
+        petLineTimer?.invalidate()
+        petLineTimer = Timer.scheduledTimer(withTimeInterval: 2.0, repeats: false) { _ in
+            Task { @MainActor [weak self] in self?.petReactionLine = "" }
+        }
+
+        NSSound(named: "Pop")?.play()
+
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.4) { [weak self] in
+            self?.petCooldown = false
+        }
+    }
+
     // MARK: - Agent list
 
     /// Builds the structured session list and a plain-text fallback chatLine.

Sources/App/PetMoodFX.swift

@@ -15,6 +15,44 @@ struct PetMotion {
     }
 }
 
+/// Hearts that float upward and fade out when the user pets (clicks) the pet.
+struct PetHearts: View {
+    let size: CGFloat
+
+    @State private var animate = false
+
+    private static let hearts: [(x: CGFloat, y: CGFloat, scale: CGFloat)] = [
+        (-0.22, -0.50, 0.8),
+        ( 0.18, -0.58, 1.0),
+        (-0.05, -0.70, 0.7),
+        ( 0.28, -0.42, 0.9),
+        (-0.30, -0.62, 0.6),
+    ]
+
+    var body: some View {
+        ZStack {
+            ForEach(0..<Self.hearts.count, id: \.self) { i in
+                let h = Self.hearts[i]
+                Image(systemName: "heart.fill")
+                    .font(.system(size: 10 * h.scale))
+                    .foregroundStyle(.pink)
+                    .offset(
+                        x: h.x * size,
+                        y: animate ? h.y * size : 0
+                    )
+                    .opacity(animate ? 0 : 0.85)
+                    .scaleEffect(animate ? 0.3 : 1.0)
+            }
+        }
+        .allowsHitTesting(false)
+        .onAppear {
+            withAnimation(.easeOut(duration: 0.8)) {
+                animate = true
+            }
+        }
+    }
+}
+
 /// Mood overlays shared by all pet renderers: sparkles while celebrating and a
 /// "?" bubble while waiting.
 struct MoodAccessories: View {

Sources/App/PetView.swift

@@ -62,8 +62,47 @@ struct FloatingPetView: View {
                 }
             }
             PetView(size: pet.petPoint)
+                .overlay {
+                    if pet.petTapCount > 0 {
+                        PetHearts(size: pet.petPoint)
+                            .id(pet.petTapCount)
+                    }
+                }
+                .overlay(alignment: .top) {
+                    if !pet.petReactionLine.isEmpty {
+                        Text(pet.petReactionLine)
+                            .font(.system(size: 13, weight: .medium))
+                            .foregroundStyle(.primary.opacity(0.85))
+                            .padding(.horizontal, 10)
+                            .padding(.vertical, 5)
+                            .background(
+                                Capsule()
+                                    .fill(.regularMaterial)
+                            )
+                            .overlay(
+                                Capsule()
+                                    .strokeBorder(Color.primary.opacity(0.08), lineWidth: 1)
+                            )
+                            .shadow(color: .black.opacity(0.15), radius: 4, y: 2)
+                            .offset(y: -16)
+                            .transition(.asymmetric(
+                                insertion: .scale(scale: 0.5, anchor: .bottom).combined(with: .opacity),
+                                removal: .opacity
+                            ))
+                    }
+                }
+                .scaleEffect(
+                    x: pet.isPetted ? 1.12 : 1.0,
+                    y: pet.isPetted ? 0.82 : 1.0,
+                    anchor: .bottom
+                )
+                .animation(.interpolatingSpring(stiffness: 300, damping: 8), value: pet.isPetted)
+                .onTapGesture {
+                    PetController.shared.petTap()
+                }
         }
         .fixedSize(horizontal: true, vertical: true)
+        .animation(.spring(response: 0.3, dampingFraction: 0.7), value: pet.petReactionLine)
         .background(
             GeometryReader { proxy in
                 Color.clear.preference(key: PetContentSizeKey.self, value: proxy.size)