feat(apple): default-UI connect/wake modal, auto-wake toggle, pixel-exact windowed streaming

Three client-UX changes that share the connect/present path (and settings files):

- Connect/wake overlay is now mode-aware: the console/gamepad UI keeps the
  full-screen aurora takeover, while the default (touch/desktop) UI shows a
  Liquid Glass modal over the host grid — the takeover looked out of place there.
- Add an auto-wake toggle (DefaultsKey.autoWake, default on) across macOS/iOS/tvOS
  Settings + the gamepad settings view; gate startSession/prepareWake and the
  gamepad "Wake & Connect" label on it. MAC-address learning stays always-on.
- Windowed sessions now stream at the window's native pixels (Match-window
  default-on) so the picture is 1:1 pixel-exact instead of the presenter
  resampling a fixed-mode frame; fullscreen reports full-display px, also 1:1.
  Also lands the mid-resize aspect-fit tracking (decoded contentSize) that keeps
  the picture undistorted after a resize.

swift build + swift test (121 tests) green; screenshot scenes verified.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

clients/apple/Sources/PunktfunkClient/Home/GamepadHomeView.swift

@@ -65,6 +65,9 @@ struct GamepadHomeView: View {
     /// Same gate the touch grid's "Browse Library…" context-menu item uses (default ON; the
     /// Settings "Game library" toggle opts out).
     @AppStorage(DefaultsKey.libraryEnabled) private var libraryEnabled = true
+    /// Auto-wake on connect (default ON) — when off, activating an offline host just dials (no wake),
+    /// so the tile drops its "Wake & Connect" affordance for a plain "Connect".
+    @AppStorage(DefaultsKey.autoWake) private var autoWakeEnabled = true
     #if os(iOS)
     /// `.compact` in a landscape phone window — drives tighter chrome so everything still fits.
     @Environment(\.verticalSizeClass) private var vSizeClass
@@ -259,7 +262,7 @@ struct GamepadHomeView: View {
                 isConnecting: model.phase == .connecting && model.activeHost?.id == host.id,
                 filled: true,
                 hasLibrary: true,
-                canWake: PunktfunkConnection.wakeOnLANAvailable
+                canWake: autoWakeEnabled && PunktfunkConnection.wakeOnLANAvailable
                     && !discovery.advertises(host) && !store.probedOnline.contains(host.id)
                     && !host.wakeMacs.isEmpty,
                 activate: { connect(host) })