feat(apple): stage-2 default + pixel-perfect, decode robustness, UI/rumble polish

Stream reliability
- Default to the stage-2 presenter (VTDecompressionSession + CAMetalLayer): it detects
  and recovers a wedged decoder, where stage-1's AVSampleBufferDisplayLayer freezes hard
  on a lost HEVC reference frame with no app-side recovery (confirmed Apple limitation).
  Stage 1 is now a DEBUG-only presenter toggle, plus the automatic no-Metal fallback.
- Stage-2 pixel-perfect: render the drawable at the decoded size (shader stays 1:1 =
  identity) and let the layer's contentsGravity scale via the system compositor — the
  same path stage-1's videoGravity used — instead of scaling in-shader.
- Loss recovery in both pumps is now a persistent awaitingIDR want, retried until an IDR
  actually lands, so a keyframe request swallowed by the throttle can't strand a frozen
  frame; 100 ms keyframe throttle to match the Android path.
- Fix "Publishing changes from within view updates": defer the HostStore writes out of
  the .onChange(of: model.phase) callback.
- Move AVAudioSession setActive/setCategory off the main thread (async on a shared serial
  queue) to stop the UI-stall warning.

Controllers
- Rumble: capped-exponential backoff when the gamecontrollerd.haptics XPC breaks (-4811)
  so a transient server interruption self-heals instead of cascading; playsHapticsOnly so
  a controller engine doesn't join the always-active streaming audio session.
- Host cards: iPad pointer "magnet" hover effect; iPhone press scale + light haptic.

UI / design
- Ship Geist (SIL OFL 1.1) as the app font (bundled OTFs + registration), with the
  license surfaced in Acknowledgements.
- Restructure iOS/iPadOS Settings into a category NavigationSplitView; resolution wheel
  with custom-resolution entry; 10-bit HDR toggle in Display.
- Industrial host-card redesign (left-aligned, bold, brand monogram tiles).

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

clients/apple/Sources/PunktfunkClient/Screenshots/ScreenshotScenes.swift

@@ -103,11 +103,11 @@ private struct ShotSettings: View {
                 .shadow(radius: 40, y: 16)
         }
         #elseif os(iOS)
-        NavigationStack {
-            SettingsView()
-                .navigationTitle("Settings")
-                .navigationBarTitleDisplayMode(.inline)
-        }
+        // SettingsView owns its NavigationSplitView (sidebar + detail) and Done button, so it is
+        // rendered directly — a wrapping NavigationStack would nest a split view in a stack. Open
+        // on General so the shot lands on real controls (iPad: sidebar + General detail; iPhone:
+        // the General page) instead of the bare category list.
+        SettingsView(initialCategory: .general)
         #else
         NavigationStack { SettingsView() }
         #endif
@@ -175,10 +175,10 @@ private struct ShotHUD: View {
                 .foregroundStyle(.secondary)
             #if os(macOS)
             Text("⌘⎋ releases the mouse")
-                .font(.caption2).foregroundStyle(.secondary)
+                .font(.geist(11, relativeTo: .caption2)).foregroundStyle(.secondary)
             #elseif os(tvOS)
             Text("Press Menu to disconnect")
-                .font(.caption).foregroundStyle(.secondary)
+                .font(.geist(12, relativeTo: .caption)).foregroundStyle(.secondary)
             #endif
         }
         .padding(10)
@@ -259,7 +259,7 @@ private struct ShotDesktopFrame: View {
             HStack(spacing: 8) {
                 Image(systemName: "gamecontroller.fill")
                 Text("Streaming from Battlestation")
-                    .font(.system(.callout, weight: .semibold))
+                    .font(.geist(16, .semibold, relativeTo: .callout))
             }
             .padding(.horizontal, 14).padding(.vertical, 9)
             .glassBackground(Capsule())