fix(apple): present windowed macOS PyroWave via IOSurface layer contents — swapID panic survives glass pacing

The DCP "mismatched swapID's" kernel panic reproduced on a 240 Hz Mac
Studio with stage-3 glass pacing active: a fully serialized,
one-in-flight present stream still races WindowServer's own swap
submissions. So the mitigation has to change the MECHANISM, not the
rate — the CAMetalLayer image queue itself is the racing path in a
composited (windowed) session.

Windowed PyroWave now presents the way video players do: the planar
CSC renders into a pooled IOSurface (4 × BGRA8, in-use-aware LRU
reuse) and the render thread hands it to a plain CALayer's `contents`
on main inside an ordinary CATransaction. WindowServer treats that as
normal layer damage on its own composite cadence — no out-of-band
image-queue swaps to race. Fullscreen keeps the CAMetalLayer path
(direct scanout, no compositing, no panic reports); the hosting view
pushes the window's composited state on every layout, and flipping
modes just covers/uncovers the metal layer (no black flash).

VT codecs keep the metal path everywhere: no panic reports there, and
their HDR/EDR presentation has no surface-contents equivalent wired.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

clients/apple/Sources/PunktfunkKit/Views/StreamView.swift

@@ -692,6 +692,11 @@ public final class StreamLayerView: NSView {
     /// the view's physical-pixel size (bounds → backing), so a window resize / retina move follows.
     private func layoutPresenter() {
         presenter.layout(in: bounds, contentsScale: window?.backingScaleFactor ?? 1)
+        // Present routing tracks the window's composited state (fullscreen transitions always
+        // re-layout, so this stays current): windowed PyroWave presents via surface contents —
+        // the DCP swapID kernel-panic mitigation (see SessionPresenter.setComposited). A view
+        // not yet in a window counts as composited (the safe default).
+        presenter.setComposited(!(window?.styleMask.contains(.fullScreen) ?? false))
         // Feed the follower only once in a window (backing scale is real then) and with real
         // bounds — a pre-window layout would report point-sized dimensions.
         if window != nil, bounds.width > 0, bounds.height > 0 {