Pick window transparency from Appearance > Window Transparency, and a Glassy bar background (#14991)

* Pick window transparency from Appearance > Window Transparency

Transparent, the default, keeps today's windows. Opaque turns the windows
Omarchy makes transparent solid. Glassy is the frosted glass Starship
(#14726): its blur behind every see-through window and shell surface, and a
see-through, blurred background in the theme's terminal files, since foot
turns compositor blur down and a Hyprland opacity rule fades text.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Leave window transparency to Appearance when animations are off

Turning animations off no longer makes windows opaque. VM installs start
with opaque windows instead, and a migration keeps them opaque for anyone
who already has animations off.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Add a Glassy bar background, under Menu Bar > Bar Background

Menu Bar > Bar Background picks Opaque Bar, Glassy Bar or Clear Bar, and
Indicators becomes Bar Indicators to match. Glassy keeps the theme
background faintly and Hyprland blurs what is behind it, with the same blur
as Glassy windows.

omarchy bar background opaque|glassy|none|cycle sets it and prints it when
given nothing. omarchy bar transparent true|false|toggle stays for
compatibility, as none and opaque. Double-clicking the bar cycles through
the three backgrounds the same way, from clear to glassy to opaque.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Stop when a saved corner choice can't be removed

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Make btop follow glassy windows

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

test/shell.d/toggle-test.sh

@@ -106,8 +106,30 @@ for virt in vm none; do
   HOME="$test_home" OMARCHY_PATH="$ROOT" bash "$ROOT/install/user/hardware/vm-no-animations.sh" >/dev/null
   if [[ $virt == "vm" ]]; then
     [[ -f $animations_flag ]] || fail "a VM install turns animations off"
+    [[ -f ${animations_flag%/*}/window-opaque.lua ]] || fail "a VM install starts with opaque windows"
   else
     [[ ! -f $animations_flag ]] || fail "a machine that is not a VM keeps its animations"
+    [[ ! -f ${animations_flag%/*}/window-opaque.lua ]] || fail "a machine that is not a VM keeps transparent windows"
   fi
 done
-pass "a VM install starts without animations"
+pass "a VM install starts without animations and with opaque windows"
+
+# Animations off no longer makes windows opaque. The migration takes that rule
+# out of a saved flag, keeping anything else in it, and keeps those windows
+# opaque through Window Transparency instead.
+migration_home=$(mktemp -d)
+migration_flags="$migration_home/.local/state/omarchy/toggles/hypr"
+mkdir -p "$migration_flags"
+printf 'hl.config({ animations = { enabled = false } })\n\no.window(".*", { opacity = "1 1" })\n-- mine\n' >"$migration_flags/no-animations.lua"
+for _ in 1 2; do
+  HOME="$migration_home" XDG_STATE_HOME="" OMARCHY_PATH="$ROOT" bash -euo pipefail "$ROOT/migrations/1791705142.sh" >/dev/null
+done
+! grep -q 'opacity' "$migration_flags/no-animations.lua" || fail "the migration drops the opacity rule from a saved animations flag"
+grep -qx -- '-- mine' "$migration_flags/no-animations.lua" || fail "the migration keeps the rest of a saved animations flag"
+[[ -f $migration_flags/window-opaque.lua ]] || fail "the migration keeps windows opaque where animations are off"
+rm -f "$migration_flags/window-opaque.lua"
+printf 'x\n' >"$migration_flags/window-glassy.lua"
+HOME="$migration_home" XDG_STATE_HOME="" OMARCHY_PATH="$ROOT" bash -euo pipefail "$ROOT/migrations/1791705142.sh" >/dev/null
+[[ ! -f $migration_flags/window-opaque.lua ]] || fail "the migration leaves a chosen transparency alone"
+rm -rf "$migration_home"
+pass "the migration moves opaque windows from the animations flag to Window Transparency"