Hold episode highlights until the episode is in the Spotify feed; auto-fill study lesson audio from the feed by season + episode; v2.19.0

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

server/routes/public.js

@@ -1,4 +1,5 @@
 import express from 'express'
+import { applyFeedRelease } from '../feed-release.js'
 import path from 'node:path'
 import { readFile } from 'node:fs/promises'
 import { escapeHtml, escapeXml, injectSeoIntoHtml, normalizeSitemapPath } from '../helpers.js'
@@ -59,6 +60,7 @@ export function register(app) {
         content = parsed.siteContent
       } catch { content = {} }
     }
+    content = await applyFeedRelease(content)
 
     const seo = content?.seo ?? DEFAULT_SEO
     const canonical = seo.canonicalUrl || DEFAULT_SEO.canonicalUrl
@@ -196,7 +198,7 @@ export function register(app) {
 
   // Scripture index — every passage covered across released study lessons and podcast episodes
   app.get('/api/public/scripture-index', async (_req, res) => {
-    const content = state.cachedSiteContent
+    const content = await applyFeedRelease(state.cachedSiteContent)
     const allStudies = Array.isArray(content?.studies) ? content.studies : []
     const allEpisodes = [
       ...(Array.isArray(content?.podcastFeaturedLinks) ? content.podcastFeaturedLinks : []),