Restore embed/ pages for WordPress iframes (dropped by the 2026-08-24 rebuild).

collatz-conjecture.html and fruit-charat-repl.html, copied from
quarto/embed/ on master. Used by allendowney.com/blog Think Java post.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: AllenDowney

embed/collatz-conjecture.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="stylesheet" href="https://chrismayfield.github.io/ThinkJava2/assets/javarunner/javarunner.css">
+  <style>
+    html, body { margin: 0; padding: 8px; }
+    /* Light console to match the editor (embed-only override). */
+    :root {
+      --jr-console-bg: #ffffff;
+      --jr-console-text: #1a1a1a;
+      --jr-console-input: #005a9e;
+      --jr-console-error: #c62828;
+      --jr-console-separator: #e0e0e0;
+      --jr-input-bg: #f8f9fa;
+      --jr-input-border: #d0d0d0;
+    }
+    .jr-repl, .jr-console { color-scheme: light; }
+    .jr-repl-input-line {
+      background: var(--jr-console-bg);
+      border-top: 1px solid var(--jr-console-separator);
+    }
+    .jr-repl-input, .jr-console-input-field {
+      background-color: var(--jr-input-bg) !important;
+      color: var(--jr-console-text) !important;
+      caret-color: var(--jr-console-text);
+      -webkit-text-fill-color: var(--jr-console-text);
+    }
+    .jr-repl-echo { color: var(--jr-console-text); }
+    .jr-editor .cm-activeLine { background-color: rgba(204, 238, 255, 0.27) !important; }
+    .jr-editor .cm-activeLineGutter { background-color: #e2f2ff !important; }
+    .jr-pending-code {
+      background-color: #f8f9fa;
+      padding: 0.5em 0.75em;
+      border-radius: 3px;
+      border: 1px solid #e0e0e0;
+      font-size: 0.95em;
+      overflow-x: auto;
+      margin: 0 0 0.5em 0;
+    }
+    .jr-pending:has(.jr-widget) > .jr-pending-code { display: none; }
+    .jr-btn-test { display: none !important; }
+  </style>
+</head>
+<body>
+<div class="jr-pending">
+<pre class="jr-pending-code"><code>int n = 3;
+while (n != 1) {
+    System.out.println(n);
+    if (n % 2 == 0) {         // n is even
+        n = n / 2;
+    } else {                  // n is odd
+        n = 3 * n + 1;
+    }
+}</code></pre>
+<script type="text/x-java">
+int n = 3;
+while (n != 1) {
+    System.out.println(n);
+    if (n % 2 == 0) {         // n is even
+        n = n / 2;
+    } else {                  // n is odd
+        n = 3 * n + 1;
+    }
+}
+</script>
+</div>
+<script defer src="https://chrismayfield.github.io/ThinkJava2/assets/javarunner/javarunner.js"></script>
+</body>
+</html>

embed/fruit-charat-repl.html

@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="stylesheet" href="https://chrismayfield.github.io/ThinkJava2/assets/javarunner/javarunner.css">
+  <style>
+    html, body { margin: 0; padding: 8px; }
+    /* Light console/REPL to match the editor (embed-only override). */
+    :root {
+      --jr-console-bg: #ffffff;
+      --jr-console-text: #1a1a1a;
+      --jr-console-input: #005a9e;
+      --jr-console-error: #c62828;
+      --jr-console-separator: #e0e0e0;
+      --jr-input-bg: #f8f9fa;
+      --jr-input-border: #d0d0d0;
+    }
+    .jr-repl, .jr-console { color-scheme: light; }
+    .jr-repl-input-line {
+      background: var(--jr-console-bg);
+      border-top: 1px solid var(--jr-console-separator);
+    }
+    .jr-repl-input, .jr-console-input-field {
+      background-color: var(--jr-input-bg) !important;
+      color: var(--jr-console-text) !important;
+      caret-color: var(--jr-console-text);
+      -webkit-text-fill-color: var(--jr-console-text);
+    }
+    .jr-repl-echo { color: var(--jr-console-text); }
+    .jr-pending-code {
+      background-color: #f8f9fa;
+      padding: 0.5em 0.75em;
+      border-radius: 3px;
+      border: 1px solid #e0e0e0;
+      font-size: 0.95em;
+      overflow-x: auto;
+      margin: 0 0 0.5em 0;
+    }
+    .jr-pending:has(.jr-widget) > .jr-pending-code { display: none; }
+    .jr-btn-test { display: none !important; }
+  </style>
+</head>
+<body>
+<div class="jr-pending">
+<pre class="jr-pending-code"><code>String fruit = "banana";
+char letter = fruit.charAt(0);</code></pre>
+<script type="text/x-java-repl">
+String fruit = "banana";
+char letter = fruit.charAt(0);
+</script>
+</div>
+<script defer src="https://chrismayfield.github.io/ThinkJava2/assets/javarunner/javarunner.js"></script>
+</body>
+</html>