omarchy-settings: pass #13362's platform-aware hooks through on aarch64

omacom/omarchy#13362 sets HOOKS per platform inside 00-omarchy-hooks.conf,
with no column-0 HOOKS= line, so the aarch64 build failed on it; settings-dev
tracks quattro automatically and would break as soon as it lands. Wrap only a
single-line HOOKS=(...), refuse any other column-0 HOOKS=, then source the
shipped files onto a Mac line and a stock line: the Mac line must come through
unchanged and the stock one must not. Back up 00-omarchy-hooks.conf when it
ships, and refuse it without the omarchy-hw-platform copy it asks.

The test now uses the real v4.0.4 hooks file, #13362's two files and
omarchy-mac-boot's 90-94 fragments, and covers upgrades over a hand-restored
file.

tests/fixtures/settings-boot/omarchy-13362/00-omarchy-hooks.conf

@@ -0,0 +1,37 @@
+# The platform's HOOKS baseline. mkinitcpio sources mkinitcpio.conf and then
+# every drop-in here in name order, so the baseline sorts first and the drop-ins
+# after it add their hooks to it instead of being overwritten by it.
+#
+# Apple Silicon boots a systemd initramfs, and its platform package adds the
+# firmware and encryption hooks. Every other machine keeps the busybox line. The
+# runtime's detector answers, or else the copy omarchy-settings ships for its
+# platform guard, so a settings package newer than the runtime still places a
+# Mac. Without either, the busybox line stays. A detector that cannot place the
+# machine stops the build rather than let it produce an image for the wrong
+# platform.
+_omarchy_platform=""
+_omarchy_detector=$(command -v omarchy-hw-platform) || _omarchy_detector=/usr/share/libalpm/scripts/omarchy-hw-platform
+if [[ -x $_omarchy_detector ]]; then
+  _omarchy_platform=$("$_omarchy_detector") || return 1
+fi
+
+# A Mac whose mkinitcpio.conf carries the asahi hook, or the busybox encrypt
+# hook that unlocks it through cryptdevice= (sd-encrypt cannot parse that), boots
+# the initramfs its platform set up without the Apple boot package, as a legacy
+# install does. Its line stays as it is. The asahi hook also marks such a root
+# off a Mac, as in a chroot or a VM.
+if [[ " ${HOOKS[*]:-} " == *" asahi "* ]] ||
+  [[ $_omarchy_platform == "apple-silicon" && " ${HOOKS[*]:-} " == *" encrypt "* ]]; then
+  _omarchy_platform=platform-owned
+fi
+
+case $_omarchy_platform in
+  platform-owned) ;;
+  apple-silicon)
+    HOOKS=(base systemd plymouth autodetect microcode modconf kms keyboard sd-vconsole block filesystems fsck)
+    ;;
+  *)
+    HOOKS=(base udev plymouth keyboard autodetect microcode modconf kms keymap consolefont block encrypt filesystems fsck btrfs-overlayfs)
+    ;;
+esac
+unset _omarchy_platform _omarchy_detector