fix: finalize confirmed Hanmac orange palette steps

packages/ui/src/theme/primitives.css

@@ -45,7 +45,7 @@
   --hm-yellow-accent: #ffc600;
 }
 
-/* Confirmed brand palette additions (ui_viz Color 4.1). */
+/* Confirmed brand palette additions (ui_viz Color 4.1; Orange Dark 1/2 confirmed by user 2026-10-11). */
 :root {
   --hm-green-dark-3: #020a07;
   --hm-brown-light-3: #c1a770;
@@ -54,5 +54,7 @@
   --hm-orange-light-3: #ec8f53;
   --hm-orange-light-2: #f87725;
   --hm-orange-light-1: #eb5f00;
+  --hm-orange-dark-1: #bc4c00;
+  --hm-orange-dark-2: #883700;
   --hm-orange-dark-3: #4f2000;
 }