feat(home): add satty for screenshot annotation

Added satty (Wayland-native screenshot annotation tool) and integrated it with the Capture flow.
Wired `$mod SHIFT, Print` to slurp a region and open satty.
Added "Annotate region" to the rofi Capture menu (Tools > Capture).
Added satty's configuration via home-manager to inject the active theme's palette colors into its UI.

Verified: V1 (flake check --no-build, home activation package build).
Pending: V3 hardware/visual check for the satty UI (queued in HARDWARE-QUEUE.md).

modules/home/default.nix

@@ -27,6 +27,7 @@
     ./mime.nix      # default applications (mimeapps.list), degrades with the suite
     ./recording.nix # nomarchy-record: screen recording behind Capture + the bar ⏺
     ./battery-notify.nix # low-battery toasts at the bar's 25/10% thresholds
+    ./satty.nix     # satty screenshot annotation tool, themed
   ];
 
   # Clipboard history (wl-paste watcher); browsed via the SUPER+CTRL+V

modules/home/keybinds.nix

@@ -68,6 +68,7 @@
     { mods = "";            key = "Print";  action = "exec, grim -g \"$(slurp)\" - | wl-copy"; desc = "Screenshot region → clipboard"; }
     { mods = "SHIFT";       key = "Print";  action = "exec, f=$HOME/Pictures/Screenshots/$(date +%Y%m%d-%H%M%S).png; mkdir -p $HOME/Pictures/Screenshots && grim -g \"$(slurp)\" \"$f\" && notify-send \"Screenshot saved\" \"$f\""; desc = "Screenshot region → file"; }
     { mods = "CTRL";        key = "Print";  action = "exec, f=$HOME/Pictures/Screenshots/$(date +%Y%m%d-%H%M%S).png; mkdir -p $HOME/Pictures/Screenshots && grim \"$f\" && notify-send \"Screenshot saved\" \"$f\""; desc = "Screenshot screen → file"; }
+    { mods = "$mod SHIFT";  key = "Print";  action = "exec, f=$HOME/Pictures/Screenshots/$(date +%Y%m%d-%H%M%S).png; mkdir -p $HOME/Pictures/Screenshots && grim -g \"$(slurp)\" - | satty --filename - --fullscreen --output-filename \"$f\""; desc = "Annotate region"; }
   ];
 
   # Rendered only when the session has >1 layout (a comma in

modules/home/rofi.nix

@@ -460,6 +460,7 @@ ${themeRows}
         choice=$( {
           row "Region → clipboard${hintForBind "" "Print"}" applets-screenshooter
           row "Region → file${hintForBind "SHIFT" "Print"}" applets-screenshooter
+          command -v satty >/dev/null 2>&1 && row "Annotate region${hintForBind "$mod SHIFT" "Print"}" edit-image
           row "Full screen → clipboard" camera-photo
           row "Full screen → file${hintForBind "CTRL" "Print"}" camera-photo
           command -v tesseract >/dev/null 2>&1 && row "OCR region → clipboard" scanner
@@ -482,6 +483,7 @@ ${themeRows}
           *"Region → clipboard"*)      grim -g "$(slurp)" - | wl-copy ;;
           *"Region → file"*)           mkdir -p "$dir"; grim -g "$(slurp)" "$file" \
                                          && notify-send "Screenshot saved" "$file" ;;
+          *"Annotate region"*)         mkdir -p "$dir"; grim -g "$(slurp)" - | satty --filename - --fullscreen --output-filename "$file" ;;
           *"OCR region"*)
             # Select → screenshot → tesseract → clipboard. Esc in slurp
             # cancels silently (the recording.nix pattern); recognizing

modules/home/satty.nix

@@ -0,0 +1,31 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.nomarchy;
+  t = cfg.theme;
+  c = t.colors;
+in
+{
+  config = lib.mkIf (pkgs.lib.meta.availableOn pkgs.stdenv.hostPlatform pkgs.satty) {
+    home.packages = [ pkgs.satty ];
+
+    xdg.configFile."satty/config.toml".text = ''
+      [general]
+      # Set the default tool to pointer or arrow?
+      initial-tool = "arrow"
+      copy-command = "wl-copy"
+      # Hitting copy also saves? Let the user hit save if they want to save.
+      # save-after-copy = false
+
+      [color-palette]
+      palette = [
+        "${c.accent}ff",
+        "${c.bad}ff",
+        "${c.warn}ff",
+        "${c.good}ff",
+        "${c.text}ff",
+        "${c.base}ff"
+      ]
+    '';
+  };
+}