small fixes

components/explorers/ratio-explorer.tsx

@@ -182,8 +182,12 @@ function RatioBar({
   );
 }
 
-export function RatioExplorer() {
-  const [mode, setMode] = useState<RatioMode>("divide");
+export function RatioExplorer({
+  initialMode = "divide",
+}: {
+  initialMode?: RatioMode;
+} = {}) {
+  const [mode, setMode] = useState<RatioMode>(initialMode);
   const [partA, setPartA] = useState("2");
   const [partB, setPartB] = useState("3");
   const [partC, setPartC] = useState("");