clean up client install/configure and add sidebar cta

scripts/pangolin-cloud-toc-cta.js

@@ -0,0 +1,75 @@
+/**
+ * Shows the Pangolin Cloud CTA in the table of contents on every page.
+ * Moves the PangolinCloudTocCta snippet (MDX Card) into the TOC when present.
+ * Re-runs on SPA navigation; avoids duplicating when DOM re-renders (e.g. theme toggle).
+ */
+(function () {
+  const MAX_ATTEMPTS = 30;
+  const RETRY_MS = 150;
+  const DEBOUNCE_MS = 100;
+  const CTA_MARKER = "data-pangolin-toc-cta";
+
+  function moveSnippetToToc() {
+    const toc = document.getElementById("table-of-contents");
+    const source = document.getElementById("pangolin-toc-cta");
+    if (!toc || !source) return false;
+
+    if (toc.querySelector("[" + CTA_MARKER + "]")) {
+      const duplicate = source.firstElementChild;
+      if (duplicate) source.removeChild(duplicate);
+      return true;
+    }
+
+    const card = source.firstElementChild;
+    if (!card) return false;
+
+    source.removeChild(card);
+    card.setAttribute(CTA_MARKER, "true");
+    toc.appendChild(card);
+    return true;
+  }
+
+  function tryRun() {
+    moveSnippetToToc();
+  }
+
+  let debounceTimer = null;
+  function scheduleRun() {
+    if (debounceTimer) clearTimeout(debounceTimer);
+    debounceTimer = setTimeout(function () {
+      debounceTimer = null;
+      tryRun();
+    }, DEBOUNCE_MS);
+  }
+
+  function run() {
+    let attempts = 0;
+    const id = setInterval(function () {
+      attempts++;
+      if (moveSnippetToToc()) {
+        clearInterval(id);
+        observeForNavigation();
+        return;
+      }
+      if (attempts >= MAX_ATTEMPTS) {
+        clearInterval(id);
+        observeForNavigation();
+      }
+    }, RETRY_MS);
+  }
+
+  function observeForNavigation() {
+    const observer = new MutationObserver(function () {
+      if (document.getElementById("pangolin-toc-cta")) {
+        scheduleRun();
+      }
+    });
+    observer.observe(document.body, { childList: true, subtree: true });
+  }
+
+  if (document.readyState === "loading") {
+    document.addEventListener("DOMContentLoaded", run);
+  } else {
+    run();
+  }
+})();