Retune opacity for Hyprland 0.56's corrected alpha premultiplication

Hyprland 0.56 fixed premultiplication in the color-management shader
(hyprwm/Hyprland#14403), so the same opacity values now render visibly
more transparent than on 0.55. Raise each value to its perceptual
equivalent (a^(1/2.2)) to restore the previous look.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

default/hypr/apps/terminals.lua

@@ -1,3 +1,3 @@
 -- Define terminal tag to style them uniformly.
 o.window("(Alacritty|kitty|com.mitchellh.ghostty|foot|wezterm)", { tag = "+terminal" })
-o.window({ tag = "terminal" }, { tag = "-default-opacity", opacity = "0.985 0.95" })
+o.window({ tag = "terminal" }, { tag = "-default-opacity", opacity = "0.985 0.96" })

default/hypr/windows.lua

@@ -22,4 +22,4 @@ o.window(
 require("default.hypr.apps")
 
 -- Apply default opacity after apps have had a chance to opt out.
-o.window({ tag = "default-opacity" }, { opacity = "0.985 0.95" })
+o.window({ tag = "default-opacity" }, { opacity = "0.985 0.96" })

themes/kanagawa/hyprland.lua

@@ -15,4 +15,4 @@ hl.config({
 })
 
 -- Kanagawa backdrop is too strong for default opacity.
-o.window({ tag = "terminal" }, { opacity = "0.99 0.975" })
+o.window({ tag = "terminal" }, { opacity = "0.99 0.985" })