refactor(modules): organize module tree

modules/desktop/utilities/screenshot.nix

@@ -0,0 +1,57 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+# Keyboard-driven screenshots that open in satty for annotation, then land in
+# both the clipboard and a dated file.
+let
+  cfg = config.modules.desktop.utilities.screenshot;
+  user = config.user.name;
+
+  grimblast = "${pkgs.grimblast}/bin/grimblast";
+  satty = "${pkgs.satty}/bin/satty";
+  wl-copy = "${pkgs.wl-clipboard}/bin/wl-copy";
+  xdgUserDir = "${pkgs.xdg-user-dirs}/bin/xdg-user-dir";
+
+  # satty's copy action also saves, so one keystroke lands the shot in both the
+  # clipboard and a file.
+  capture =
+    target:
+    pkgs.writeShellScript "screenshot-${target}" ''
+      dir="$(${xdgUserDir} PICTURES)/Screenshots"
+      mkdir -p "$dir"
+      ${grimblast} save ${target} - \
+        | ${satty} --filename - \
+          --output-filename "$dir/screenshot-%Y%m%d-%H%M%S.png" \
+          --copy-command ${wl-copy} \
+          --save-after-copy \
+          --early-exit \
+          --actions-on-enter save-to-clipboard
+    '';
+in
+{
+  options.modules.desktop.utilities.screenshot.enable = lib.mkEnableOption "screenshots via grimblast and satty";
+
+  config = lib.mkIf cfg.enable {
+    home-manager.users.${user} = {
+      # satty is a one-shot annotation surface, so float it rather than letting
+      # it claim a tile in the layout.
+      # windowrule v3 syntax: space-separated field/value tokens, comma
+      # separated, with matchers under a match: prefix and effects bare.
+      wayland.windowManager.hyprland.settings.windowrule = [
+        "float 1, match:class ^(com\\.gabm\\.satty)$"
+      ];
+
+      # Print with plain/Shift/Ctrl for region/window/full.
+      # Super+L is already the hjkl focus and movement bind, so screenshots take
+      # the Print key instead.
+      wayland.windowManager.hyprland.settings.bind = [
+        ", Print, exec, ${capture "area"}"
+        "SHIFT, Print, exec, ${capture "active"}"
+        "CTRL, Print, exec, ${capture "screen"}"
+      ];
+    };
+  };
+}