Gospel page audio: narration script, ElevenLabs generator, player on /salvation, admin Gospel Page setting; v2.40.0

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

server/routes/salvation.js

@@ -1,5 +1,6 @@
 import { Resend } from 'resend'
-import { escapeHtml } from '../helpers.js'
+import { escapeHtml, sanitizeUrl } from '../helpers.js'
+import { state } from '../state.js'
 import { getResendFromAddress, getResendInboxAddress, getResendReplyToAddress, getCanonicalBaseUrl, sendResendEmailWithRetry } from '../email.js'
 
 // A visitor who finished the /salvation page can tell us they prayed to receive Christ.
@@ -226,6 +227,13 @@ function buildSalvationConfirmationEmail({ name }) {
 }
 
 export function register(app) {
+  // The /salvation page is static HTML, so it asks the server for the narration URL set in Admin → Gospel Page.
+  app.get('/api/salvation-audio', (_req, res) => {
+    const url = sanitizeUrl(state.cachedSiteContent?.salvationAudioUrl) || ''
+    res.set('Cache-Control', 'public, max-age=300')
+    res.json({ url })
+  })
+
   app.post('/api/salvation-response', rateLimit, async (req, res) => {
     const { name, email, message, _honey } = req.body ?? {}
     if (_honey) { res.json({ ok: true }); return }