Make BOS a complete, bootable, themed desktop OS

Install/boot reliability:
- Use native Calamares initcpiocfg/initcpio + explicit grub-install (nvram +
  --removable) in post-install; drop the flaky native bootloader/grubcfg modules.
- mount.conf: bind /proc /sys /dev (devtmpfs) /run + efivars into the chroot.
- bos-copy-kernel: stage kernel + write a stock mkinitcpio preset (replace the
  archiso preset). Per-service systemctl enable (fixes NetworkManager et al.
  silently not enabling due to the all-or-nothing grub-btrfs.path name).

System completeness:
- greetd + tuigreet graphical login; installed pacman.conf + working mirrorlist;
  base CLI tools (nano, micro, vim, htop, …); amd/intel-ucode; tlp + hypridle
  power management; systemd-timesyncd, fstrim.timer; wpa_supplicant wifi; Zen
  browser (republished to the [Breadway] repo).

Desktop + theming:
- Native Lua Hyprland config (hyprland.lua) with curated standard binds; kitty
  (blur) replaces foot; awww wallpaper + pywal palette (tamed to a black base
  with warm accents); GTK dark mode.
- Plymouth boot splash (bos theme: logo + spinner + status) via plymouthcfg.
- Varela Round font; Calamares bread-palette sidebar (logo/black-region polish
  still pending).

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

iso/airootfs/usr/local/bin/bos-live-setup

@@ -19,16 +19,16 @@ if ! id liveuser &>/dev/null; then
 fi
 
 # Layer the installer onto the live desktop: auto-launch it, and bind Super+I to
-# relaunch it after it's been closed. Appended to (not replacing) the skel
-# Hyprland config so the full desktop stays intact.
-HYPR=/home/liveuser/.config/hypr/hyprland.conf
+# relaunch it after it's been closed. Appended (in Lua) to the skel hyprland.lua
+# native config so the full desktop stays intact.
+HYPR=/home/liveuser/.config/hypr/hyprland.lua
 install -d -m 0755 -o liveuser -g liveuser /home/liveuser/.config/hypr
 if ! grep -q bos-launch-calamares "$HYPR" 2>/dev/null; then
     cat >>"$HYPR" <<'EOF'
 
-# --- live-media installer (added by bos-live-setup; absent on installed system) ---
-exec-once = bos-launch-calamares
-bind = SUPER, I, exec, bos-launch-calamares
+-- --- live-media installer (added by bos-live-setup; absent on installed system) ---
+hl.bind("SUPER + I", hl.dsp.exec_cmd("bos-launch-calamares"))
+hl.on("hyprland.start", function() hl.dispatch(hl.dsp.exec_cmd("bos-launch-calamares")) end)
 EOF
 fi