Bake GeForce NOW native Linux app (beta) via first-boot installer

NVIDIA's client ships from their own flatpak repo (com.nvidia.geforcenow),
which default-flatpaks can't add alongside Flathub — so a stamped oneshot
service installs it on first boot with retries. Docs note the BC-250 has
no hardware video decode: streams are CPU-decoded, keep to 1080p.

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

files/console/usr/bin/bc250-gfn-install

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+# First-boot installer for the GeForce NOW native Linux app (beta).
+# GFN ships from NVIDIA's own flatpak repo, not Flathub, so the
+# default-flatpaks module can't handle it. Retries while the network
+# settles; stamps /var/lib/bc250/.gfn-installed on success so the
+# service never runs again.
+
+STAMP_DIR="/var/lib/bc250"
+STAMP="$STAMP_DIR/.gfn-installed"
+REPO_URL="https://international.download.nvidia.com/GFNLinux/flatpak/geforcenow.flatpakrepo"
+
+[ -f "$STAMP" ] && exit 0
+
+for attempt in $(seq 1 30); do
+    if flatpak remote-add --if-not-exists --system GeForceNOW "$REPO_URL" \
+       && flatpak install --system --noninteractive -y GeForceNOW com.nvidia.geforcenow; then
+        mkdir -p "$STAMP_DIR"
+        touch "$STAMP"
+        echo "GeForce NOW installed."
+        exit 0
+    fi
+    echo "GeForce NOW install attempt $attempt failed; retrying in 60s..."
+    sleep 60
+done
+
+echo "GeForce NOW install failed after 30 attempts; will retry next boot." >&2
+exit 1