Make application transparency opt-in (#14253)

* Make application transparency opt-in

* Use the transparency helper for Kanagawa

* Address transparency review findings

* Toggle transparency for opaque windows too

default/hypr/windows.lua

@@ -2,9 +2,6 @@
 
 o.window(".*", { suppress_event = "maximize" })
 
--- Tag all windows for default opacity (apps can override with -default-opacity tag).
-o.window(".*", { tag = "+default-opacity" })
-
 -- Fix some dragging issues with XWayland.
 o.window(
   {
@@ -18,8 +15,12 @@ o.window(
   { no_focus = true }
 )
 
--- App-specific tweaks (may remove default-opacity tag).
+-- App-specific tweaks and terminal tags.
 require("default.hypr.apps")
 
--- Apply default opacity after apps have had a chance to opt out.
-o.window({ tag = "default-opacity" }, { opacity = "0.985 0.96" })
+-- Terminals (including TUIs) and these desktop apps opt in to transparency.
+o.transparent_window({ tag = "terminal" })
+o.transparent_window("(omawrite|1[pP]assword|com\\.onepassword\\.OnePassword|org\\.gnome\\.Nautilus)")
+
+-- The transparency hotkey opts otherwise opaque windows in with this tag.
+o.transparent_window({ tag = "transparent" })