feat(apple): the gamepad UI comes to tvOS - focus-driven, with real session controls

The console UI now runs on tvOS through the NATIVE focus engine: carousel
cards and settings rows are focusable Buttons (Siri Remote and pads both
navigate; imperative scrollTo replaces the drop-prone scrollPosition binding),
while iOS/macOS keep the 60 Hz poll untouched - on tvOS it carries only what
focus has no concept of: X/Y screen actions and left/right value adjust with
the poll's dominant-axis feel (onMoveCommand proved input-source-dependent:
keyboard intercepted, pad dpad not -> double steps). Text entry uses the
system fullscreen keyboard (TVTextEntry); pairing + library present as covers
under the launcher; the game library defaults ON; settings values slide a
quiet 14 pt in the step's direction.

Session controls: controller/remote input routes EXCLUSIVELY through
GameController during a stream (GCEventViewController, interaction disabled) -
a pad's B no longer doubles as a UIKit menu press that ended sessions
mid-game. Deliberate exits only: the cross-client escape chord (hold
L1+R1+Start+Select 1.5 s - pf-client-core's contract, now implemented on all
Apple platforms) and holding the remote's Back >= 1 s; the start-of-stream
banner (now also on tvOS) teaches both. The Siri Remote's touch surface
drives the host pointer - press = left click, Play/Pause = right click,
release-tail jumps gated so motion stays truly relative.

tvOS 26 regressions fixed at the root: the app-wide brand tint rendered every
unfocused control as a blank pill (tint dropped on tvOS) and the 17 pt root
font shrank the whole platform (29 pt there), plus 10-foot sizing across host
cards, the gamepad screens, and the stats HUD (whose misleading "Press Menu"
hint is gone). Acknowledgements scrolls by focus-sized chunks and Menu pops
instead of suspending; full-width focusSections make the home actions
reachable from any column. The presenter defaults to stage-3 glass pacing on
tvOS (a 60 Hz panel fed a 60 fps stream is the sticky-FIFO worst case behind
the 50 ms display stage) and is pickable from the gamepad settings; HDR
capability advertises from AVPlayer.eligibleForHDRPlayback instead of the
current mode's EDR headroom, so an SDR home screen no longer hides an HDR TV.

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

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

@@ -29,8 +29,9 @@ struct HomeView: View {
     /// Explicit Wake-on-LAN of an offline host — fires the packet and waits for it to come online
     /// (the "Waking…" overlay), without connecting. Routed through ContentView's HostWaker.
     let wake: (StoredHost) -> Void
-    /// Experimental game-library browser (gated) — the host-card "Browse Library…" action.
-    @AppStorage(DefaultsKey.libraryEnabled) private var libraryEnabled = false
+    /// Game-library browser (default ON; the Settings toggle opts out) — the host-card
+    /// "Browse Library…" action.
+    @AppStorage(DefaultsKey.libraryEnabled) private var libraryEnabled = true
     /// The host being edited (name / address / port / Wake-on-LAN MAC) — drives the edit sheet.
     @State private var editTarget: StoredHost?
 
@@ -48,6 +49,13 @@ struct HomeView: View {
                                 }
                             }
                             .padding()
+                            // Mirror of the action row's focusSection below: an UPWARD move from
+                            // the centered buttons must land back in the grid even when no card
+                            // sits in the buttons' columns (a lone top-left card, say). The grid
+                            // spans the row, so the section catches every upward ray.
+                            #if os(tvOS)
+                            .focusSection()
+                            #endif
                         }
                         if !discoveredUnsaved.isEmpty {
                             discoveredSection
@@ -67,6 +75,14 @@ struct HomeView: View {
                             }
                         }
                         .padding(.top, 24)
+                        // One FULL-WIDTH focus target for any downward move out of the grid.
+                        // focusSection alone is not enough: the engine tests the section's
+                        // FRAME, and a content-hugging centered HStack only overlaps the middle
+                        // columns — a swipe down from an outer card dead-ends and the actions
+                        // are unreachable by remote. Stretching the section across the row means
+                        // every column's downward ray hits it.
+                        .frame(maxWidth: .infinity)
+                        .focusSection()
                         #endif
                     }
                 }
@@ -198,6 +214,10 @@ struct HomeView: View {
         }
         .padding([.horizontal, .bottom])
         .padding(.top, store.hosts.isEmpty ? 0 : 8)
+        // Same reachability contract as the saved grid above — see its focusSection comment.
+        #if os(tvOS)
+        .focusSection()
+        #endif
     }
 
     /// Discovered hosts not already saved (see `HostDiscovery.unsaved` — shared with the gamepad
@@ -259,7 +279,9 @@ struct HomeView: View {
         #if os(macOS)
         [GridItem(.adaptive(minimum: 250, maximum: 320), spacing: 16)]
         #elseif os(tvOS)
-        [GridItem(.adaptive(minimum: 320), spacing: 48)]
+        // Tracks CardMetrics' 10-foot sizes — at the 30pt name a 320pt column truncates
+        // every hostname longer than ~10 characters.
+        [GridItem(.adaptive(minimum: 460), spacing: 48)]
         #else
         [GridItem(.adaptive(minimum: 280), spacing: 16)]
         #endif