Implement nose coupling so run-arounds work, and stop coupling wiping the district

src/web/main.ts

@@ -341,9 +341,12 @@ function clearSave(): void {
   }
 }
 
-const tipStyle = document.createElement('style');
-tipStyle.textContent = TOOLTIP_CSS;
-document.head.appendChild(tipStyle);
+// BOTH stylesheets. The board is SVG built by the shared renderers, and every shape it draws is
+// styled by class — without BOARD_CSS each rect falls back to a black fill on a near-black
+// background, so the cards are drawn correctly and are simply invisible.
+const pageStyle = document.createElement('style');
+pageStyle.textContent = BOARD_CSS + TOOLTIP_CSS;
+document.head.appendChild(pageStyle);
 installTooltips();
 
 const saveBtn = document.getElementById('savefile');