feat(clockout): celebration on boundary cross

Prior: clockoutRemainingSec rolled forward to tomorrow the moment
target <= now, so the panel jumped 1s → 86399s with no observable
"zero" — the most expected moment of the day was silent.

Now:
- clockoutRemainingSec returns 0 when past today's clockout (sits
  at 0 until midnight rolls the calendar component)
- WorkerStore detects the >0 → 0 edge in tickFire, fires per-day-
  deduped celebration (notification + Glass × 3 + panel banner ~5s)
- SoundPlayer.playClockoutCelebration: Glass.aiff × 3 with 0.6s gap
  (joyful 1.8s shot, not the sit Morse's 15s nag)
- ClockoutView overlays a lime→tomato gradient banner driven by
  store.clockoutCelebrationActive
- tipText rewrite — old text said "不会响铃" which contradicts

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Sources/engine/SoundPlayer.swift

@@ -50,6 +50,25 @@ final class SoundPlayer {
         }
     }
 
+    /// Clockout celebration tone — Glass (1.0s sustained "✨" tone)
+    /// played 3 times with 0.5s gap. Distinct from sit Morse so the
+    /// user instantly knows "下班" not "起来动一下".
+    func playClockoutCelebration() {
+        stop()
+        let glassURL = URL(fileURLWithPath: "/System/Library/Sounds/Glass.aiff")
+        // 3 chimes at 0s, 0.6s, 1.2s — shorter cadence than sit (full
+        // shot of joy, not a nag). Schedule with DispatchQueue async
+        // since this is a fixed-shot pattern, no need for a Timer loop.
+        for delay in [0.0, 0.6, 1.2] {
+            DispatchQueue.main.asyncAfter(deadline: .now() + delay) { [weak self] in
+                guard let _ = self else { return }
+                if let s = NSSound(contentsOf: glassURL, byReference: true) {
+                    s.play()
+                }
+            }
+        }
+    }
+
     /// Cancel any in-flight alert. Called by WorkerStore.sitStop() so
     /// "user stopped sit monitoring" silences the nag immediately.
     func stop() {

Sources/engine/WorkerStore.swift

@@ -43,6 +43,7 @@ private enum K {
     static let waterHistory          = "water.history"           // [String: Int] (date → cups)
     static let waterGoal             = "water.goal"              // Int, default 8
     static let clockoutHHmm          = "clockout.hhmm"           // String "18:00"
+    static let lastClockoutCelebDate = "clockout.lastCelebDate"  // String yyyy-MM-dd, dedupe per-day
 }
 
 private let suiteName = "com.mioisland.plugin.worker"
@@ -139,6 +140,15 @@ final class WorkerStore: ObservableObject {
     /// Clockout
     @Published var clockoutHour: Int = 18
     @Published var clockoutMinute: Int = 0
+    /// Brief celebratory flag — true for ~5s after crossing the clockout
+    /// boundary. ClockoutView reads this to overlay a banner. Reset by
+    /// the tick after the fade window.
+    @Published var clockoutCelebrationActive: Bool = false
+    /// Wallclock at which celebration should clear. Tick monitors this.
+    private var clockoutCelebrationEndsAt: Date? = nil
+    /// Previous tick's clockout remaining seconds. Used to detect the
+    /// >0 → 0 crossing edge.
+    private var prevClockoutRemSec: Int? = nil
 
     /// Weekend (derived)
     @Published var weekendDays: Int = 0
@@ -285,10 +295,43 @@ final class WorkerStore: ObservableObject {
         // 3. Weekend countdown — recompute every tick (cheap).
         recomputeWeekend()
 
-        // 4. Detect day rollover for pomodoro / water / sit counters.
+        // 4. Clockout — fire celebration on the boundary crossing edge.
+        let curClockoutRem = clockoutRemainingSec
+        if let prev = prevClockoutRemSec, prev > 0 && curClockoutRem == 0 {
+            triggerClockoutCelebrationIfNeeded()
+        }
+        prevClockoutRemSec = curClockoutRem
+        // Clear the celebration flag once the fade window elapses.
+        if let endsAt = clockoutCelebrationEndsAt, Date() >= endsAt {
+            clockoutCelebrationActive = false
+            clockoutCelebrationEndsAt = nil
+        }
+
+        // 5. Detect day rollover for pomodoro / water / sit counters.
         rolloverIfNeeded()
     }
 
+    /// Per-day-deduped celebration trigger. Fires UN notification +
+    /// Glass tone × 3 + sets the in-panel banner flag for ~5s.
+    private func triggerClockoutCelebrationIfNeeded() {
+        let today = Self.dateKey(Date(), calendar: calendar)
+        let lastCeleb = defaults.string(forKey: K.lastClockoutCelebDate) ?? ""
+        guard lastCeleb != today else {
+            WorkerDebugLog.write("clockout boundary @ \(today) but already celebrated, skip")
+            return
+        }
+        defaults.set(today, forKey: K.lastClockoutCelebDate)
+
+        WorkerDebugLog.write("clockout celebration fired for \(today)")
+        WorkerNotificationCenter.shared.notify(
+            title: "今日打卡下班 🎉",
+            body: "辛苦了，到点了，关 IDE 下班！"
+        )
+        SoundPlayer.shared.playClockoutCelebration()
+        clockoutCelebrationActive = true
+        clockoutCelebrationEndsAt = Date().addingTimeInterval(5.0)
+    }
+
     // MARK: - Pomodoro
 
     /// Total duration (seconds) of the active phase. Used as denominator
@@ -523,18 +566,24 @@ final class WorkerStore: ObservableObject {
         defaults.set(String(format: "%02d:%02d", h, m), forKey: K.clockoutHHmm)
     }
 
-    /// Seconds remaining until today's clockout. If it's already past,
-    /// returns the seconds until tomorrow's clockout (rolls over).
+    /// Seconds remaining until **today's** clockout. Returns 0 when
+    /// already past — the next day rolls automatically when calendar's
+    /// dateComponents(.year,.month,.day, from: now) picks up the new
+    /// date after midnight.
+    ///
+    /// Prior version rolled forward to tomorrow on `target <= now`, so
+    /// the moment clockout was hit the counter jumped 1s → 86399s with
+    /// no observable "zero" frame — celebrating the "下班" moment was
+    /// impossible. Now: hit zero, hold zero until midnight, restart at
+    /// new day's wall-time countdown.
     var clockoutRemainingSec: Int {
         let now = Date()
         var comps = calendar.dateComponents([.year, .month, .day], from: now)
         comps.hour = clockoutHour
         comps.minute = clockoutMinute
         comps.second = 0
-        var target = calendar.date(from: comps) ?? now
-        if target <= now {
-            target = calendar.date(byAdding: .day, value: 1, to: target) ?? target
-        }
+        guard let target = calendar.date(from: comps) else { return 0 }
+        if target <= now { return 0 }
         return max(0, Int(target.timeIntervalSince(now)))
     }
 

Sources/ui/ClockoutView.swift

@@ -14,26 +14,66 @@ struct ClockoutView: View {
     @State private var editMinute: Int = 0
 
     var body: some View {
-        VStack(spacing: 18) {
-            statusBadge
+        ZStack(alignment: .top) {
+            VStack(spacing: 18) {
+                statusBadge
 
-            countdownDisplay
+                countdownDisplay
 
-            progressBar
+                progressBar
 
-            controls
+                controls
 
-            Divider()
-                .background(WorkerTheme.overlay08)
-                .padding(.horizontal, 24)
+                Divider()
+                    .background(WorkerTheme.overlay08)
+                    .padding(.horizontal, 24)
 
-            timeRow
+                timeRow
 
-            tipText
+                tipText
 
-            Spacer(minLength: 0)
+                Spacer(minLength: 0)
+            }
+            .padding(.top, 8)
+
+            // Celebration banner — overlays the panel for ~5s after the
+            // user crosses today's clockout boundary. Subtle gold→lime
+            // shimmer so it pops without being kindergarten-style confetti.
+            if store.clockoutCelebrationActive {
+                celebrationBanner
+                    .transition(
+                        .asymmetric(
+                            insertion: .move(edge: .top).combined(with: .opacity),
+                            removal: .opacity
+                        )
+                    )
+            }
         }
-        .padding(.top, 8)
+        .animation(.spring(response: 0.35, dampingFraction: 0.78),
+                   value: store.clockoutCelebrationActive)
+    }
+
+    private var celebrationBanner: some View {
+        VStack(spacing: 4) {
+            Text("🎉 今日打卡下班 🎉")
+                .font(.system(size: 16, weight: .bold))
+                .foregroundColor(.black)
+            Text("辛苦了，到点了，关 IDE 下班！")
+                .font(.system(size: 11, weight: .medium))
+                .foregroundColor(.black.opacity(0.7))
+        }
+        .frame(maxWidth: .infinity)
+        .padding(.vertical, 14)
+        .background(
+            LinearGradient(
+                colors: [WorkerTheme.lime, WorkerTheme.tomato.opacity(0.95)],
+                startPoint: .leading, endPoint: .trailing
+            )
+        )
+        .clipShape(RoundedRectangle(cornerRadius: 14))
+        .shadow(color: WorkerTheme.lime.opacity(0.45), radius: 16, x: 0, y: 4)
+        .padding(.horizontal, 16)
+        .padding(.top, 4)
     }
 
     // MARK: - Status
@@ -236,7 +276,7 @@ struct ClockoutView: View {
     }
 
     private var tipText: some View {
-        Text("下班时间到时不会响铃 —\n本插件只负责让你看着时间倒计时偷着乐。")
+        Text("到点会有通知 + 一段 Glass 音效庆祝下班\n每日只触发一次，重启插件不会重复响铃。")
             .font(.system(size: 11))
             .foregroundColor(WorkerTheme.fg45)
             .padding(.horizontal, 20)