Leave an auto-scaled internal panel alone in clamshell recovery (#7581)

With the default scale = "auto", sync_internal_scale read the config,
rejected "auto" as non-numeric, fell back to the hardcoded default 2,
and force-applied it whenever the compositor's auto resolution differed.
Since the script runs from omarchy-system-wake after every idle cycle,
the panel flapped between 2 and auto's own value (1.5666667 on a 198 DPI
panel) on every wake/reload pair.

A config without a usable number -- "auto", or an expression only
Hyprland's Lua can evaluate -- delegates the scale to the compositor:
whatever it resolved for the enabled panel is the configured scale, so
there is nothing to correct. Recovery of a disabled panel is unchanged
and still re-enables it with the remembered scale, falling back to the
historical default 2.

Fixes #7265. Also the scale-revert half of #7301.


Claude-Session: https://claude.ai/code/session_01L4Z6GimYhR1Kpsir24VAPF

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

bin/omarchy-hyprland-monitor-clamshell

@@ -118,9 +118,17 @@ remember_internal_scale() {
   store_internal_scale "$scale"
 }
 
+# $1 is the configured scale when the caller has already read it, so one sync
+# does not parse the config twice.
 read_monitor_scale() {
   local scale
-  scale=$(configured_monitor_scale)
+
+  if (( $# )); then
+    scale="$1"
+  else
+    scale=$(configured_monitor_scale)
+  fi
+
   if valid_scale "$scale"; then
     echo "$scale"
     return
@@ -159,11 +167,25 @@ enable_internal_output() {
 
 sync_internal_scale() {
   [[ -n $INTERNAL ]] || return 0
+  local configured_scale
   local desired_scale
   local active_scale
 
-  desired_scale=$(read_monitor_scale)
+  configured_scale=$(configured_monitor_scale)
   active_scale=$(current_internal_scale)
+
+  # A config without a usable number -- the default "auto", or an expression
+  # only Hyprland's Lua can evaluate -- delegates the scale to the compositor,
+  # so whatever it resolved for the enabled panel IS the configured scale.
+  # There is no number to correct it toward: substituting one makes the scale
+  # flap between that number and the compositor's own value on every idle-wake.
+  # Only a panel that is off altogether still gets a hand below, from the
+  # remembered scale.
+  if ! valid_scale "$configured_scale" && valid_scale "$active_scale"; then
+    return 0
+  fi
+
+  desired_scale=$(read_monitor_scale "$configured_scale")
   scales_match "$active_scale" "$desired_scale" && return 0
 
   enable_internal_output "$desired_scale"