Fix T2 Mac suspend and fan defaults (#6562)

* Fix T2 Mac suspend and fan defaults

* Avoid repeated T2 boot image rebuilds

* Harden T2 migration test matching

migrations/1785944594.sh

@@ -0,0 +1,57 @@
+echo "Update T2 Mac suspend, Touch Bar, and fan defaults"
+
+if ! lspci -nn | grep -q "106b:180[12]"; then
+  exit 0
+fi
+
+limine_conf="${OMARCHY_T2_LIMINE_CONF:-/etc/limine-entry-tool.d/t2-mac.conf}"
+fan_conf="${OMARCHY_T2_FAN_CONF:-/etc/t2fand.conf}"
+running_cmdline="${OMARCHY_T2_RUNNING_CMDLINE:-/proc/cmdline}"
+repair_marker="${OMARCHY_T2_REPAIR_MARKER:-/var/lib/omarchy/migrations/1785944594}"
+needs_limine_rebuild=0
+
+if [[ -f $limine_conf ]] && grep -q 'pcie_ports=compat' "$limine_conf"; then
+  sudo sed -i \
+    's/pcie_ports=compat/pm_async=off mem_sleep_default=deep/' \
+    "$limine_conf"
+  needs_limine_rebuild=1
+fi
+
+# t2fanrd reads one section per detected fan and fails when a section is
+# missing. Extra sections are ignored, so this also remains safe on one-fan
+# models.
+if [[ -f $fan_conf ]] && ! grep -Eq '^[[:space:]]*\[Fan2\][[:space:]]*$' "$fan_conf"; then
+  sudo tee -a "$fan_conf" >/dev/null <<'EOF'
+
+[Fan2]
+low_temp=55
+high_temp=75
+speed_curve=linear
+always_full_speed=false
+EOF
+fi
+
+# The kernel's built-in Boot Camp-style Touch Bar works without tiny-dfr. The
+# optional daemon holds stale device descriptors across suspend with t2bce.
+if omarchy-pkg-present tiny-dfr; then
+  sudo systemctl disable --now tiny-dfr.service || true
+  omarchy-pkg-drop tiny-dfr
+fi
+
+# The current kernel keeps its old command line until reboot. Record a
+# successful machine-wide rebuild so another user's migration does not repeat
+# it before then, while a missing marker still retries an interrupted rebuild.
+if [[ -f $limine_conf ]] &&
+  [[ ! -e $repair_marker ]] &&
+  grep -q 'pm_async=off' "$limine_conf" &&
+  grep -q 'mem_sleep_default=deep' "$limine_conf" &&
+  { [[ ! -r $running_cmdline ]] ||
+    ! grep -Eq '(^| )pm_async=off( |$)' "$running_cmdline" ||
+    ! grep -Eq '(^| )mem_sleep_default=deep( |$)' "$running_cmdline"; }; then
+  needs_limine_rebuild=1
+fi
+
+if (( needs_limine_rebuild )); then
+  sudo limine-mkinitcpio
+  sudo install -Dm644 /dev/null "$repair_marker"
+fi