feat: floating button

src/Rankings.tsx

@@ -175,7 +175,9 @@ export function Chemistry({ user, players }: PlayerInfoProps) {
         </div>
       </div>
 
-      <button onClick={() => handleSubmit()}>submit</button>
+      <button className="submit" onClick={() => handleSubmit()}>
+        💾 <span className="submit_text">submit</span>
+      </button>
       <dialog
         id="ChemistryDialog"
         onClick={(event) => {