refactor(#28): DebugOverlay rep Config::RenderingConfig per referència

Pas 2/N del hallazgo #28.

DebugOverlay deixa d'incloure game/options.hpp i passa a rebre un
const Config::RenderingConfig& en el seu constructor. El Director li
passa Options::rendering (que ja és un alias d'engine_config.rendering).

Eliminat: include "game/options.hpp" des de core/system/debug_overlay.cpp.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

source/core/system/debug_overlay.cpp

@@ -5,7 +5,6 @@
 #include <string>
 
 #include "core/types.hpp"
-#include "game/options.hpp"
 
 namespace System {
 
@@ -22,9 +21,10 @@ constexpr float OVERLAY_BRIGHTNESS = 1.0F;
         constexpr float FPS_UPDATE_INTERVAL = 0.5F;
     }  // namespace
 
-DebugOverlay::DebugOverlay(Rendering::Renderer* renderer)
+    DebugOverlay::DebugOverlay(Rendering::Renderer* renderer,
-    : text_(renderer)
+        const Config::RenderingConfig& rendering_cfg)
-      {}
+        : text_(renderer),
+          rendering_cfg_(&rendering_cfg) {}
 
     void DebugOverlay::update(float delta_time) {
         fps_accumulator_ += delta_time;
@@ -43,15 +43,18 @@ void DebugOverlay::draw() const {
         }
 
         const std::string FPS_TEXT = "FPS: " + std::to_string(fps_display_);
-    const std::string VSYNC_TEXT = std::string("VSYNC: ")
+        const std::string VSYNC_TEXT = std::string("VSYNC: ") + (rendering_cfg_->vsync == 1 ? "ON" : "OFF");
-        + (Options::rendering.vsync == 1 ? "ON" : "OFF");
 
         text_.render(FPS_TEXT,
             Vec2{.x = OVERLAY_X, .y = OVERLAY_Y_FPS},
-                 OVERLAY_SCALE, OVERLAY_SPACING, OVERLAY_BRIGHTNESS);
+            OVERLAY_SCALE,
+            OVERLAY_SPACING,
+            OVERLAY_BRIGHTNESS);
         text_.render(VSYNC_TEXT,
             Vec2{.x = OVERLAY_X, .y = OVERLAY_Y_FPS + OVERLAY_LINE_HEIGHT},
-                 OVERLAY_SCALE, OVERLAY_SPACING, OVERLAY_BRIGHTNESS);
+            OVERLAY_SCALE,
+            OVERLAY_SPACING,
+            OVERLAY_BRIGHTNESS);
     }
 
 }  // namespace System

source/core/system/debug_overlay.hpp

@@ -7,6 +7,7 @@
 
 #pragma once
 
+#include "core/config/engine_config.hpp"
 #include "core/graphics/vector_text.hpp"
 #include "core/rendering/render_context.hpp"
 
@@ -14,7 +15,10 @@ namespace System {
 
     class DebugOverlay {
        public:
-        explicit DebugOverlay(Rendering::Renderer* renderer);
+        // El rendering_cfg ha de viure tant com l'overlay (el posseeix
+        // el Director, que sobreviu a tots els sistemes).
+        DebugOverlay(Rendering::Renderer* renderer,
+            const Config::RenderingConfig& rendering_cfg);
 
         // Acumula FPS. Llamar una vez por frame con el delta del Director.
         void update(float delta_time);
@@ -27,6 +31,7 @@ class DebugOverlay {
 
        private:
         Graphics::VectorText text_;
+        const Config::RenderingConfig* rendering_cfg_;
         bool visible_{true};
 
         // FPS counter — se actualiza cada FPS_UPDATE_INTERVAL segundos.

source/core/system/director.cpp

@@ -258,7 +258,7 @@ auto Director::run() -> int {
 
     // Overlay de debug (FPS + VSync). Vive en el Director porque es global
     // a todas las escenas. Toggle con F11 (visible por defecto en _DEBUG).
-    System::DebugOverlay debug_overlay(sdl.getRenderer());
+    System::DebugOverlay debug_overlay(sdl.getRenderer(), Options::rendering);
 
     // Bucle principal: construir escena → frame loop → destruir → siguiente.
     while (context.nextScene() != SceneType::EXIT) {