Add verse linking to study guides

Implement automatic verse reference linking in study guide content pages.

Changes:
- Added verse linking JavaScript to study_guide_detail.html
- Supports all verse reference patterns:
  * Single verses: "John 3:16"
  * Verse ranges: "Romans 8:28-29"
  * Comma-separated lists: "Psalms 7:17, 9:2, 18:13"
- Links verses in section content paragraphs
- Skips margin toggle label paragraphs to avoid double-linking

Now study guides like /study-guides/new-believer will have all
verse references automatically linked and hoverable for tooltips.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

kjvstudy_org/templates/study_guide_detail.html

@@ -2,6 +2,96 @@
 
 {% block title %}{{ guide.title }} - Bible Study Guide - KJV Bible{% endblock %}
 
+{% block head %}
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+    // Function to link verse references in text
+    function linkVerseReferences(element) {
+        if (!element) return;
+
+        // Get all text nodes
+        const walker = document.createTreeWalker(element, NodeFilter.SHOW_TEXT, null, false);
+        const textNodes = [];
+        let node;
+        while (node = walker.nextNode()) {
+            textNodes.push(node);
+        }
+
+        textNodes.forEach(function(textNode) {
+            let text = textNode.textContent;
+            let changed = false;
+
+            // First, handle comma-separated verse lists like "Psalms 7:17, 9:2, 18:13"
+            // Pattern: Book chapter:verse, chapter:verse, chapter:verse...
+            text = text.replace(/\b(\d?\s?[A-Z][a-z]+(?:\s+[A-Z][a-z]+)?)\s+((?:\d+:\d+(?:-\d+)?(?:\s*,\s*)?)+)/g, function(match, book, verseList) {
+                book = book.trim();
+
+                // Check if this is actually a comma-separated list
+                if (!verseList.includes(',')) {
+                    // Single verse, will be handled by the next regex
+                    return match;
+                }
+
+                changed = true;
+
+                // Split by comma and process each verse reference
+                var verses = verseList.split(/\s*,\s*/);
+                var links = verses.map(function(verseRef) {
+                    verseRef = verseRef.trim();
+                    var parts = verseRef.match(/^(\d+):(\d+)(?:-(\d+))?$/);
+                    if (parts) {
+                        var chapter = parts[1];
+                        var verseStart = parts[2];
+                        var verseEnd = parts[3];
+
+                        if (verseEnd) {
+                            return '<a href="/book/' + book + '/chapter/' + chapter + '#verse-' + verseStart + '-' + verseEnd + '">' + book + ' ' + chapter + ':' + verseStart + '-' + verseEnd + '</a>';
+                        } else {
+                            return '<a href="/book/' + book + '/chapter/' + chapter + '/verse/' + verseStart + '">' + book + ' ' + chapter + ':' + verseStart + '</a>';
+                        }
+                    }
+                    return verseRef;
+                });
+
+                return links.join(', ');
+            });
+
+            // Then handle individual verse references like "John 3:16" or "Romans 8:28-29"
+            // This regex handles book names with optional numbers and spaces
+            text = text.replace(/\b(\d?\s?[A-Z][a-z]+(?:\s+[A-Z][a-z]+)?)\s+(\d+):(\d+)(?:-(\d+))?\b/g, function(match, book, chapter, verseStart, verseEnd) {
+                changed = true;
+                book = book.trim();
+                if (verseEnd) {
+                    return '<a href="/book/' + book + '/chapter/' + chapter + '#verse-' + verseStart + '-' + verseEnd + '">' + match + '</a>';
+                } else {
+                    return '<a href="/book/' + book + '/chapter/' + chapter + '/verse/' + verseStart + '">' + match + '</a>';
+                }
+            });
+
+            if (changed) {
+                const span = document.createElement('span');
+                span.innerHTML = text;
+                textNode.parentNode.replaceChild(span, textNode);
+                // Replace the span's children with its contents
+                while (span.firstChild) {
+                    span.parentNode.insertBefore(span.firstChild, span);
+                }
+                span.parentNode.removeChild(span);
+            }
+        });
+    }
+
+    // Link verse references in all section content paragraphs
+    document.querySelectorAll('section p').forEach(function(paragraph) {
+        // Skip paragraphs that are just margin toggle labels
+        if (!paragraph.querySelector('.margin-toggle')) {
+            linkVerseReferences(paragraph);
+        }
+    });
+});
+</script>
+{% endblock %}
+
 {% block content %}
 <h1>{{ guide.title }}</h1>
 <p class="subtitle"><a href="/">Authorized King James Version</a></p>