Add copy code button

src/layouts/BlogPostLayout.astro

@@ -80,6 +80,11 @@ const currentPath = Astro.url.pathname;
     <Comments />
     <ScrollToTop />
   </article>
+
+  <div id="copy-code-icons" class="hidden">
+    <span id="copy-icon"><Icon name="fa6-solid:clone" class="w-4 h-4" /></span>
+    <span id="check-icon"><Icon name="fa6-solid:check" class="w-4 h-4" /></span>
+  </div>
 </BaseLayout>
 
 <script>
@@ -103,4 +108,48 @@ const currentPath = Astro.url.pathname;
       document.body.style.overflow = "";
     }
   });
+
+  function initCopyCodeButtons() {
+    const copyIcon = document.getElementById("copy-icon")?.innerHTML;
+    const checkIcon = document.getElementById("check-icon")?.innerHTML;
+
+    if (!copyIcon || !checkIcon) return;
+
+    const codeBlocks = document.querySelectorAll("pre");
+
+    codeBlocks.forEach((pre) => {
+      if (!pre.querySelector("code")) return;
+      if (pre.querySelector(".copy-code-btn")) return;
+
+      pre.classList.add("relative", "group");
+
+      const button = document.createElement("button");
+      button.className = "copy-code-btn absolute top-2 right-2 p-1.5 bg-surface-alt border border-border rounded-md text-fg-secondary cursor-pointer opacity-0 transition-opacity group-hover:opacity-100 hover:bg-accent hover:text-white hover:border-accent z-10 flex items-center justify-center";
+      button.setAttribute("aria-label", "Copy code");
+      button.innerHTML = copyIcon;
+
+      button.addEventListener("click", async () => {
+        const code = pre.querySelector("code")?.innerText || pre.innerText;
+        try {
+          await navigator.clipboard.writeText(code);
+          button.classList.add("copied");
+          button.classList.remove("text-fg-secondary");
+          button.classList.add("text-green-500");
+          button.innerHTML = checkIcon;
+          setTimeout(() => {
+            button.classList.remove("copied");
+            button.classList.remove("text-green-500");
+            button.classList.add("text-fg-secondary");
+            button.innerHTML = copyIcon;
+          }, 2000);
+        } catch (err) {
+          console.error("Failed to copy code:", err);
+        }
+      });
+
+      pre.appendChild(button);
+    });
+  }
+
+  initCopyCodeButtons();
 </script>