Fix hyprland decoration configuration

modules/home/hyprland/hyprland.nix

@@ -36,15 +36,19 @@ in
         multisample_edges = true;
         inactive_opacity = 0.95;
 
-        blur = true;
-        blur_size = 3;
-        blur_passes = 3;
-        blur_new_optimizations = true;
+        blur = {
+          enabled = true;
+          size = 3;
+          passes = 3;
+          new_optimizations = true;
+        };
 
-        drop_shadow = true;
-        shadow_range = 4;
-        shadow_render_power = 3;
-        col.shadow = "rgba(1a1a1aee)";
+        shadow = {
+          enabled = true;
+          range = 4;
+          render_power = 3;
+          color = "rgba(1a1a1aee)";
+        };
       };
 
       env = [