fastfetch: more DE detail + stylix palette

settings/shell.nix

@@ -1,4 +1,11 @@
 { config, pkgs, lib, ... }:
+let
+  c = config.lib.stylix.colors;
+  # Truecolor swatch for one base16 slot. `` stays a literal JSON escape
+  # here — fastfetch's JSONC parser turns it into a real ESC byte.
+  swatch = n: "\\u001b[48;2;${c."${n}-rgb-r"};${c."${n}-rgb-g"};${c."${n}-rgb-b"}m  ";
+  paletteRow = names: lib.concatMapStrings swatch names + "\\u001b[0m";
+in
 {
   # Install fastfetch
   environment.systemPackages = with pkgs; [
@@ -38,11 +45,43 @@
         "separator",
         "os",
         "kernel",
+        "uptime",
+        "memory",
+        "break",
         "de",
+        "wm",
+        "theme",
+        "icons",
+        "cursor",
+        "font",
+        "display",
         "shell",
         "terminal",
-        "uptime",
-        "memory"
+        "terminalfont",
+        "break",
+        {
+          "type": "custom",
+          "key": "Scheme",
+          "format": "base16, generated by stylix from wallpaper.png (${config.stylix.polarity})"
+        },
+        {
+          "type": "custom",
+          "key": "Base",
+          "format": "${paletteRow [ "base00" "base01" "base02" "base03" "base04" "base05" "base06" "base07" ]}"
+        },
+        {
+          "type": "custom",
+          "key": "Accent",
+          "format": "${paletteRow [ "base08" "base09" "base0A" "base0B" "base0C" "base0D" "base0E" "base0F" ]}"
+        },
+        {
+          "type": "colors",
+          "key": "Term",
+          "symbol": "block",
+          "block": {
+            "width": 2
+          }
+        }
       ]
     }
   '';