High-res: bestiary shows the detailed sprites, toolbar buttons on stone

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/gfx.rs

@@ -343,6 +343,10 @@ pub fn set_high_res_ui(on: bool) {
     HIGH_RES_UI.with(|h| h.set(on));
 }
 
+pub fn high_res_ui() -> bool {
+    HIGH_RES_UI.with(|h| h.get())
+}
+
 // ---- furniture materials (crate::props::Mat order): grey detail the furniture's colours tint
 // (the page keeps its colours), 64x64 and 16x16; see art/generated/textures/materials/
 macro_rules! material {