Refine HUD backings and default scope feather to 100 percent

changelog.d/1397-scope-controls-hud-readability.md

@@ -1,4 +1,5 @@
 - Add a Scope checkbox and extend feathering to 200%, retaining scope settings
-  across HUD layouts, share links and scenes. Give Tactical, Operator and Minimal
-  text subtle black backings, including vertical metadata, while keeping map
-  attribution clear (bilawalsidhu, #1397).
+  across HUD layouts, share links and scenes. First run opens with Scope ON at
+  100% feather; explicit settings and historical links retain their values. Give
+  Tactical, Operator and Minimal text darker black backings without halos or
+  overlapping lines, including vertical metadata, while keeping map attribution clear (bilawalsidhu, #1397).