refactor: separate js code

index.html

@@ -20,24 +20,6 @@
         </div>
       </div>
     </div>
-    <script>
-      const input = document.getElementById("channel-input");
-      const copyBtn = document.getElementById("copy-btn");
-      const linkEl = document.getElementById("game-link");
-
-      function copyLink() {
-        const name = input.value.trim().toLowerCase() || "Ku6ep_XBOCTuK";
-        const url = `${location.origin}${location.pathname.replace(/\/[^/]*$/, "/")}game.html?channel=${encodeURIComponent(name)}`;
-        navigator.clipboard.writeText(url).then(() => {
-          linkEl.textContent = "СКОПИРОВАНО!";
-          linkEl.className = "copied";
-        });
-      }
-
-      copyBtn.addEventListener("click", copyLink);
-      input.addEventListener("keydown", (e) => {
-        if (e.key === "Enter") copyLink();
-      });
-    </script>
+    <script src="js/index.js"></script>
   </body>
 </html>