feat: reduce app container border radius

Signed-off-by: Marco <marcoambrosini@icloud.com>

core/css/apps.scss

@@ -24,7 +24,7 @@
 	/* - 2px is required for making it look nice */
 	--border-radius-rounded: calc(var(--default-clickable-area) / 2 + var(--default-grid-baseline) * 2 - 2px);
 
-	--body-container-radius: var(--border-radius-rounded);
+	--body-container-radius: calc(var(--default-grid-baseline) * 3);
 	--body-container-margin: calc(var(--default-grid-baseline) * 2);
 	--body-height: calc(100% - env(safe-area-inset-bottom) - 50px - var(--body-container-margin));
 }