fix(apple): drive DualSense rumble over raw HID (CoreHaptics is silent on macOS)

GameController's CHHapticEngine never reaches the DualSense's motors on macOS — its
adaptive triggers and lightbar work, but rumble stays silent (a documented platform
gap). Drive the motors directly via the DualSense HID output report instead, the way
SDL and the Linux hid-playstation driver do — the same report that already rumbles
the pad on a Linux host. Confirmed live on macOS.

- DualSenseHID (macOS): opens the Sony DualSense via IOHIDManager and writes the USB
  (0x02, 48 bytes) and Bluetooth (0x31, 78 bytes + CRC32) output reports through
  IOHIDDeviceSetReport. Allowed under the App Sandbox by the existing device.usb +
  device.bluetooth entitlements; coexists with GameController (non-seized open).
  Flags mirror the kernel driver (COMPATIBLE_VIBRATION | HAPTICS_SELECT +
  COMPATIBLE_VIBRATION2); valid_flag1 = 0 so a rumble report leaves the
  GameController-managed lightbar / triggers / player LEDs untouched.
- RumbleRenderer routes a DualSense to the HID backend and keeps CoreHaptics for
  every other pad, fixing both live sessions and the test panel (shared renderer).
- CoreHaptics path reworked too: bake the target intensity + an explicit sharpness
  into the continuous event (the dynamic-parameter scaling is silent on controller
  engines) and tear down outside the inout access to fix a latent exclusivity hazard.

Adds a DEBUG-only Settings -> Controllers -> "Test Controller" panel (ControllerTestView
+ ControllerTester) that shows live input and fires rumble / adaptive triggers /
lightbar / player LEDs straight at the pad, with a readout of the active rumble backend
("DualSense HID - USB/Bluetooth"). Used to validate the fix.

Tests: DualSenseHIDTests pins the USB/BT report layout and the BT CRC32 (canonical
0xCBF43926 check vector). Debug + release build clean; gamepad suite green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

clients/apple/Sources/PunktfunkClient/ControllerTestView.swift

@@ -0,0 +1,387 @@
+// DEBUG-only controller test panel, reached from Settings → Controllers → "Test Controller…".
+// It shows the live input of the active controller and lets you fire the host→client feedback
+// channels — rumble, DualSense adaptive triggers, lightbar, player LEDs — straight at the
+// physical pad (no host needed), so the rendering paths a session uses can be confirmed
+// on-device. Driven by PunktfunkKit's `ControllerTester`, which reuses the real renderers.
+//
+// tvOS is excluded for now (it has no segmented picker / the panel wants a pointer-style
+// layout); macOS + iOS/iPadOS cover the validation need.
+
+#if DEBUG && !os(tvOS)
+import GameController
+import PunktfunkKit
+import SwiftUI
+
+@MainActor
+struct ControllerTestView: View {
+    @Environment(\.dismiss) private var dismiss
+    @ObservedObject private var gamepads = GamepadManager.shared
+    @StateObject private var tester = ControllerTester()
+
+    @State private var heavyOn = false
+    @State private var lightOn = false
+    @State private var intensity = 0.75
+    @State private var triggerTarget = TriggerTarget.both
+    @State private var playerLED = -1
+
+    private enum TriggerTarget: String, CaseIterable, Identifiable {
+        case left = "L2", right = "R2", both = "Both"
+        var id: String { rawValue }
+    }
+
+    private struct TriggerDemo: Identifiable {
+        let label: String
+        let effect: DualSenseTriggerEffect
+        var id: String { label }
+    }
+
+    private static let triggerDemos: [TriggerDemo] = [
+        .init(label: "Off", effect: .off),
+        .init(label: "Resistance", effect: .feedback(start: 0.3, strength: 0.7)),
+        .init(label: "Weapon", effect: .weapon(start: 0.4, end: 0.7, strength: 0.9)),
+        .init(label: "Vibration", effect: .vibration(start: 0.1, amplitude: 0.8, frequency: 0.5)),
+        .init(label: "Bow", effect: .slope(start: 0.2, end: 0.9, startStrength: 0.2, endStrength: 0.9)),
+    ]
+
+    // (display name, hardware colour, swatch colour)
+    private static let lightSwatches: [(String, GCColor, Color)] = [
+        ("Red", GCColor(red: 1, green: 0, blue: 0), .red),
+        ("Green", GCColor(red: 0, green: 1, blue: 0), .green),
+        ("Blue", GCColor(red: 0, green: 0.2, blue: 1), .blue),
+        ("White", GCColor(red: 1, green: 1, blue: 1), .white),
+    ]
+
+    var body: some View {
+        VStack(spacing: 0) {
+            HStack {
+                Text("Test Controller").font(.headline)
+                Spacer()
+                Button("Done") { dismiss() }.keyboardShortcut(.cancelAction)
+            }
+            .padding()
+            Divider()
+            ScrollView {
+                VStack(alignment: .leading, spacing: 16) {
+                    if let active = gamepads.active {
+                        header(active)
+                        inputCard
+                        rumbleCard()
+                        triggerCard(active)
+                        extrasCard(active)
+                    } else {
+                        ContentUnavailableView(
+                            "No controller",
+                            systemImage: "gamecontroller",
+                            description: Text("Connect a controller and pick it under "
+                                + "Settings → Controllers → Use controller."))
+                            .frame(maxWidth: .infinity, minHeight: 220)
+                    }
+                }
+                .padding()
+            }
+        }
+        .frame(minWidth: 420, minHeight: 540)
+        .onAppear { tester.target(gamepads.active?.controller) }
+        .onDisappear { tester.stop() }
+        .onChange(of: gamepads.active?.id) { _, _ in
+            heavyOn = false
+            lightOn = false
+            playerLED = -1
+            tester.target(gamepads.active?.controller)
+        }
+    }
+
+    // MARK: Header
+
+    private func header(_ c: GamepadManager.DiscoveredController) -> some View {
+        HStack(spacing: 10) {
+            Image(systemName: c.isDualSense ? "playstation.logo" : "gamecontroller.fill")
+                .font(.title2)
+                .foregroundStyle(.secondary)
+            VStack(alignment: .leading, spacing: 2) {
+                Text(c.name).font(.headline)
+                Text(c.productCategory).font(.caption).foregroundStyle(.secondary)
+            }
+            Spacer()
+        }
+    }
+
+    // MARK: Input
+
+    private var inputCard: some View {
+        card("Input") {
+            // Poll the live controller at 30 Hz — no handlers installed, so nothing else's
+            // capture is disturbed.
+            TimelineView(.periodic(from: .now, by: 1.0 / 30.0)) { _ in
+                if let gp = gamepads.active?.controller.extendedGamepad {
+                    inputReadout(gp, controller: gamepads.active?.controller)
+                } else {
+                    Text("Not an extended gamepad").foregroundStyle(.secondary)
+                }
+            }
+        }
+    }
+
+    @ViewBuilder
+    private func inputReadout(_ g: GCExtendedGamepad, controller: GCController?) -> some View {
+        VStack(alignment: .leading, spacing: 14) {
+            HStack(alignment: .top, spacing: 20) {
+                stick("L", x: g.leftThumbstick.xAxis.value, y: g.leftThumbstick.yAxis.value,
+                      pressed: g.leftThumbstickButton?.isPressed ?? false)
+                stick("R", x: g.rightThumbstick.xAxis.value, y: g.rightThumbstick.yAxis.value,
+                      pressed: g.rightThumbstickButton?.isPressed ?? false)
+                VStack(spacing: 8) {
+                    triggerBar("L2", value: g.leftTrigger.value)
+                    triggerBar("R2", value: g.rightTrigger.value)
+                }
+            }
+            buttonGrid(g)
+            if let tp = Self.touchpad(g) {
+                touchpadView(tp)
+            }
+            if let m = controller?.motion {
+                motionReadout(m)
+            }
+        }
+    }
+
+    private func stick(_ label: String, x: Float, y: Float, pressed: Bool) -> some View {
+        VStack(spacing: 4) {
+            ZStack {
+                Circle().stroke(Color.secondary.opacity(0.3))
+                Circle()
+                    .fill(pressed ? Color.accentColor : Color.secondary)
+                    .frame(width: 12, height: 12)
+                    .offset(x: CGFloat(x) * 22, y: CGFloat(-y) * 22) // GC y is +up
+            }
+            .frame(width: 56, height: 56)
+            Text("\(label) \(sgn(x)),\(sgn(y))").font(.caption2.monospaced()).foregroundStyle(.secondary)
+        }
+    }
+
+    private func triggerBar(_ label: String, value: Float) -> some View {
+        HStack(spacing: 6) {
+            Text(label).font(.caption2.monospaced()).frame(width: 22, alignment: .leading)
+            GeometryReader { geo in
+                ZStack(alignment: .leading) {
+                    Capsule().fill(Color.secondary.opacity(0.15))
+                    Capsule().fill(Color.accentColor).frame(width: geo.size.width * CGFloat(value))
+                }
+            }
+            .frame(height: 10)
+            Text(mag(value)).font(.caption2.monospaced()).frame(width: 34, alignment: .trailing)
+                .foregroundStyle(.secondary)
+        }
+        .frame(width: 150)
+    }
+
+    private func buttonGrid(_ g: GCExtendedGamepad) -> some View {
+        var items: [(String, Bool)] = [
+            ("A", g.buttonA.isPressed), ("B", g.buttonB.isPressed),
+            ("X", g.buttonX.isPressed), ("Y", g.buttonY.isPressed),
+            ("LB", g.leftShoulder.isPressed), ("RB", g.rightShoulder.isPressed),
+            ("L3", g.leftThumbstickButton?.isPressed ?? false),
+            ("R3", g.rightThumbstickButton?.isPressed ?? false),
+            ("Menu", g.buttonMenu.isPressed),
+            ("Opts", g.buttonOptions?.isPressed ?? false),
+            ("↑", g.dpad.up.isPressed), ("↓", g.dpad.down.isPressed),
+            ("←", g.dpad.left.isPressed), ("→", g.dpad.right.isPressed),
+        ]
+        if let tp = Self.touchpad(g) { items.append(("Pad", tp.button.isPressed)) }
+        return LazyVGrid(
+            columns: Array(repeating: GridItem(.flexible(), spacing: 6), count: 5), spacing: 6
+        ) {
+            ForEach(items.indices, id: \.self) { i in
+                Text(items[i].0)
+                    .font(.caption.monospaced())
+                    .frame(maxWidth: .infinity, minHeight: 24)
+                    .background(
+                        RoundedRectangle(cornerRadius: 6)
+                            .fill(items[i].1 ? Color.accentColor : Color.secondary.opacity(0.15)))
+                    .foregroundStyle(items[i].1 ? Color.white : Color.secondary)
+            }
+        }
+    }
+
+    private func touchpadView(
+        _ tp: (primary: GCControllerDirectionPad, secondary: GCControllerDirectionPad,
+               button: GCControllerButtonInput)
+    ) -> some View {
+        VStack(alignment: .leading, spacing: 4) {
+            Text("Touchpad\(tp.button.isPressed ? " — click" : "")")
+                .font(.caption2).foregroundStyle(.secondary)
+            ZStack {
+                RoundedRectangle(cornerRadius: 8).stroke(Color.secondary.opacity(0.3))
+                fingerDot(tp.primary, color: .accentColor)
+                fingerDot(tp.secondary, color: .orange)
+            }
+            .frame(width: 150, height: 74)
+        }
+    }
+
+    private func fingerDot(_ pad: GCControllerDirectionPad, color: Color) -> some View {
+        let x = pad.xAxis.value, y = pad.yAxis.value
+        let active = !(x == 0 && y == 0) // GC snaps a lifted finger to exactly (0, 0)
+        return Circle().fill(color).frame(width: 10, height: 10)
+            .offset(x: CGFloat(x) * 71, y: CGFloat(-y) * 33)
+            .opacity(active ? 1 : 0)
+    }
+
+    private func motionReadout(_ m: GCMotion) -> some View {
+        let a = Self.totalAccel(m)
+        return VStack(alignment: .leading, spacing: 2) {
+            Text("Motion").font(.caption2).foregroundStyle(.secondary)
+            Text(String(format: "gyro  %+.2f %+.2f %+.2f",
+                        m.rotationRate.x, m.rotationRate.y, m.rotationRate.z))
+                .font(.caption2.monospaced())
+            Text(String(format: "accel %+.2f %+.2f %+.2f", a.0, a.1, a.2))
+                .font(.caption2.monospaced())
+        }
+    }
+
+    // MARK: Rumble
+
+    private func rumbleCard() -> some View {
+        card("Rumble") {
+            VStack(alignment: .leading, spacing: 12) {
+                Picker("Strength", selection: $intensity) {
+                    Text("25%").tag(0.25)
+                    Text("50%").tag(0.5)
+                    Text("75%").tag(0.75)
+                    Text("100%").tag(1.0)
+                }
+                .pickerStyle(.segmented)
+                Toggle("Heavy motor (left)", isOn: $heavyOn)
+                Toggle("Light motor (right)", isOn: $lightOn)
+                Label("Backend: \(tester.rumbleBackend)", systemImage: "waveform")
+                    .font(.caption).foregroundStyle(.secondary)
+                Text("Toggle a motor to feel it. The host maps a game's low/high-frequency "
+                    + "rumble onto these two. A DualSense is driven over raw HID (CoreHaptics "
+                    + "can't reach its motors on macOS).")
+                    .font(.caption).foregroundStyle(.secondary)
+            }
+            .onChange(of: heavyOn) { _, _ in applyRumble() }
+            .onChange(of: lightOn) { _, _ in applyRumble() }
+            .onChange(of: intensity) { _, _ in applyRumble() }
+        }
+    }
+
+    private func applyRumble() {
+        tester.rumble(low: heavyOn ? Float(intensity) : 0, high: lightOn ? Float(intensity) : 0)
+    }
+
+    // MARK: Adaptive triggers
+
+    private func triggerCard(_ c: GamepadManager.DiscoveredController) -> some View {
+        card("Adaptive triggers") {
+            if c.hasAdaptiveTriggers {
+                VStack(alignment: .leading, spacing: 12) {
+                    Picker("Apply to", selection: $triggerTarget) {
+                        ForEach(TriggerTarget.allCases) { Text($0.rawValue).tag($0) }
+                    }
+                    .pickerStyle(.segmented)
+                    LazyVGrid(
+                        columns: [GridItem(.adaptive(minimum: 96), spacing: 8)], spacing: 8
+                    ) {
+                        ForEach(Self.triggerDemos) { demo in
+                            Button(demo.label) { applyTrigger(demo.effect) }
+                                .buttonStyle(.bordered)
+                        }
+                    }
+                    Text("Pick an effect, then pull L2/R2 to feel the resistance.")
+                        .font(.caption).foregroundStyle(.secondary)
+                }
+            } else {
+                Text("Adaptive triggers need a DualSense.")
+                    .font(.caption).foregroundStyle(.secondary)
+            }
+        }
+    }
+
+    private func applyTrigger(_ e: DualSenseTriggerEffect) {
+        switch triggerTarget {
+        case .left: tester.applyTrigger(e, right: false)
+        case .right: tester.applyTrigger(e, right: true)
+        case .both:
+            tester.applyTrigger(e, right: false)
+            tester.applyTrigger(e, right: true)
+        }
+    }
+
+    // MARK: Lightbar + player LED
+
+    @ViewBuilder
+    private func extrasCard(_ c: GamepadManager.DiscoveredController) -> some View {
+        if c.hasLight {
+            card("Lightbar & player LED") {
+                VStack(alignment: .leading, spacing: 12) {
+                    HStack(spacing: 12) {
+                        ForEach(Self.lightSwatches.indices, id: \.self) { i in
+                            Button { tester.setLight(Self.lightSwatches[i].1) } label: {
+                                Circle().fill(Self.lightSwatches[i].2)
+                                    .frame(width: 26, height: 26)
+                                    .overlay(Circle().stroke(Color.secondary.opacity(0.4)))
+                            }
+                            .buttonStyle(.plain)
+                        }
+                        Button("Off") { tester.setLight(nil) }.buttonStyle(.bordered)
+                    }
+                    Picker("Player LED", selection: $playerLED) {
+                        Text("Off").tag(-1)
+                        Text("1").tag(0)
+                        Text("2").tag(1)
+                        Text("3").tag(2)
+                        Text("4").tag(3)
+                    }
+                    .pickerStyle(.segmented)
+                    .onChange(of: playerLED) { _, v in
+                        tester.setPlayerIndex(GCControllerPlayerIndex(rawValue: v) ?? .indexUnset)
+                    }
+                }
+            }
+        }
+    }
+
+    // MARK: Helpers
+
+    private func card<Content: View>(
+        _ title: String, @ViewBuilder _ content: () -> Content
+    ) -> some View {
+        VStack(alignment: .leading, spacing: 10) {
+            Text(title).font(.subheadline.weight(.semibold))
+            content()
+        }
+        .frame(maxWidth: .infinity, alignment: .leading)
+        .padding(14)
+        .background(RoundedRectangle(cornerRadius: 12).fill(Color.secondary.opacity(0.08)))
+    }
+
+    private func sgn(_ v: Float) -> String { String(format: "%+.2f", v) }
+    private func mag(_ v: Float) -> String { String(format: "%.2f", v) }
+
+    /// The touchpad surface of a PlayStation pad — `GCDualSenseGamepad` and `GCDualShockGamepad`
+    /// don't share a touchpad type, so downcast either. `nil` for any other controller.
+    private static func touchpad(
+        _ g: GCExtendedGamepad
+    ) -> (primary: GCControllerDirectionPad, secondary: GCControllerDirectionPad,
+          button: GCControllerButtonInput)? {
+        if let ds = g as? GCDualSenseGamepad {
+            return (ds.touchpadPrimary, ds.touchpadSecondary, ds.touchpadButton)
+        }
+        if let ds4 = g as? GCDualShockGamepad {
+            return (ds4.touchpadPrimary, ds4.touchpadSecondary, ds4.touchpadButton)
+        }
+        return nil
+    }
+
+    /// Total acceleration in g: gravity + user when the pad splits them, else the raw vector.
+    private static func totalAccel(_ m: GCMotion) -> (Double, Double, Double) {
+        if m.hasGravityAndUserAcceleration {
+            return (m.gravity.x + m.userAcceleration.x,
+                    m.gravity.y + m.userAcceleration.y,
+                    m.gravity.z + m.userAcceleration.z)
+        }
+        return (m.acceleration.x, m.acceleration.y, m.acceleration.z)
+    }
+}
+#endif