refactor(primitives_gallery): usar AppConfig.about + init_gl_loader (issue 0043)

cpp/apps/primitives_gallery/main.cpp

@@ -14,7 +14,6 @@
 #include "core/page_header.h"
 #include "core/toast.h"
 #include "core/app_menubar.h"
-#include "gfx/gl_loader.h"
 
 #include "demos.h"
 #include "demo.h"
@@ -124,15 +123,8 @@ static void draw_sidebar() {
 }
 
 static void render() {
-    static bool init_done = false;
-    if (!init_done) {
-        fn_tokens::apply_dark_theme();
-        // En Linux es no-op; en Windows resuelve los punteros GL via wglGetProcAddress.
-        // Imprescindible antes de invocar primitivos que usen OpenGL 2.0+ (graph_viewport,
-        // shader_canvas, etc).
-        fn::gfx::gl_loader_init();
-        init_done = true;
-    }
+    // Theme y gl_loader gestionados por fn::run_app (theme=FnDark por defecto,
+    // init_gl_loader=true en AppConfig).
 
     // MainMenuBar (solo Settings — la gallery no tiene paneles toggleables ni layouts)
     fn_ui::app_menubar(nullptr, 0, nullptr);
@@ -171,8 +163,14 @@ static void render() {
 
 int main(int /*argc*/, char** /*argv*/) {
     return fn::run_app(
-        {.title = "fn_registry · Primitives Gallery",
-         .width = 1400, .height = 900, .viewports = true},
+        {.title          = "fn_registry · Primitives Gallery",
+         .width          = 1400,
+         .height         = 900,
+         .viewports      = true,
+         .about          = {.name        = "Primitives Gallery",
+                            .version     = "0.1.0",
+                            .description = "Visual catalog of fn_registry C++ UI primitives"},
+         .init_gl_loader = true},
         render
     );
 }