Fix graphics options not hidden when Software renderer is pre-selected (#15)

Call showOrHideGraphicsOptions() after loading config from OPFS to ensure
Anti-aliasing and Anisotropic filtering are properly hidden when the
Software renderer is already configured in the INI file.

src/lib/ConfigurePage.svelte

@@ -68,6 +68,7 @@
                 // Save defaults silently (no toast on initial creation)
                 await saveConfig(configForm, getSiFiles, true);
             }
+            showOrHideGraphicsOptions();
         }
 
         // Check cache status