feat(niri): amber-orange focus-ring, width 4 (ff8c00)

Frank's outline restyle: focus-ring red #e01b24 -> #ffb000 -> #ff8c00
(orange), thickness 2 -> 4 in base layout.kdl. The visible ring is
painted by noctalia.kdl, included LAST in config.kdl — its focus-ring
active/urgent colors moved to #ff8c00 too; tab-indicator, insert-hint,
and recent-window highlights deliberately stay red.

noctalia.kdl was hand-written live-only (Oct 14, no repo copy — the
override that silently beat every layout.kdl edit); first durable copy
lands in the zz-blankpad mirror.

dotfiles/niri/.config/niri/cfg/layout.kdl

@@ -19,9 +19,9 @@
     }
     shadow
     focus-ring {
-        width 2
+        width 4
 
-        active-color "#e01b24"
+        active-color "#ff8c00"
     }
     border {
         off