Studies: add a Download Study Guide button to the study page, automatic from the linked series/book or chosen per study in admin; v2.35.0

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

src/studyPages.tsx

@@ -2,6 +2,7 @@ import { useEffect, useMemo, useRef, useState, useCallback } from 'react'
 import DOMPurify from 'dompurify'
 import { Link, useLocation, useNavigate, useParams } from 'react-router-dom'
 import type { SiteContent, StudyProgram, StudySection } from './content'
+import { getStudyGuideLink } from './content'
 import { DEFAULT_COLOSSIANS_STUDY_SECTIONS } from './legacyColossiansData'
 import { usePageMeta } from './hooks/usePageMeta'
 import { Breadcrumbs } from './components/Breadcrumbs'
@@ -1704,6 +1705,8 @@ export function ColossiansStudyIndexPage({ content }: Props) {
     }
   }
 
+  const studyGuide = getStudyGuideLink(content, study)
+
   return (
     <main className="study-index-page" aria-label={`${study.title} study`}>
       <section className="section-study-course-hero">
@@ -1740,6 +1743,7 @@ export function ColossiansStudyIndexPage({ content }: Props) {
                 {enrolling ? 'Enrolling...' : 'Enroll in This Study'}
               </button>
             )}
+            {studyGuide && <Link to={`/downloads/${studyGuide.pageId}`} className="btn-secondary">📄 Download Study Guide</Link>}
             {allLessonsDone && <Link to="/study/account" className="btn-secondary">🏅 My Certificate</Link>}
             {enrolled && <Link to={`/study/${study.slug}/notes`} className="btn-secondary">My Notes</Link>}
             {enrolled && studyStatus !== 'planned' && <Link to={`/study/${study.slug}/community`} className="btn-secondary">Community</Link>}