INCONS-05 + triage final d'auditoria game/

- INCONS-05: `buildScreenConfig` passa a return amb designated
  initializers, consistent amb `buildAudioConfig`.
- INCONS-01: marcat DONE (parcial) — queden 3 estils intencionals
  (namespace per estat compartit, classes per entitats, constexpr per
  alias), ja no barreja fortuïta.
- INCONS-03/04, PATCH-03, COUP-04, CONV-04: WONTFIX amb raó
  documentada (contractes diferents, linter ho dicta, o sobre-abstracció
  per a un únic caller).
- COUP-02/03, CONV-02 (parcial): DEFERRED a `refactor/options-class`
  (equivalent a COUP-01 de l'audit d'àudio).
- CONV-01: DONE per HC-01/02/03/04/05/06.

source/game/options.cpp

@@ -504,15 +504,15 @@ namespace Options {
     }
 
     auto buildScreenConfig() -> Screen::Config {
-        Screen::Config config;
-        config.zoom = window.zoom;
-        config.fullscreen = window.fullscreen;
-        config.vsync = video.vsync;
-        config.scaling_mode = video.scaling_mode;
-        config.texture_filter = video.texture_filter;
-        config.gpu_acceleration = video.gpu.acceleration;
-        config.preferred_driver = video.gpu.preferred_driver;
-        return config;
+        return {
+            .zoom = window.zoom,
+            .fullscreen = window.fullscreen,
+            .vsync = video.vsync,
+            .scaling_mode = video.scaling_mode,
+            .texture_filter = video.texture_filter,
+            .gpu_acceleration = video.gpu.acceleration,
+            .preferred_driver = video.gpu.preferred_driver,
+        };
     }
 
     auto buildAudioConfig() -> ::Audio::Config {