Make re-engagement email tiers configurable from admin; v1.1.20

Day thresholds and per-tier subject/body/CTA are now editable in the
Email Templates panel. Tier keys are position-based (t1/t2/t3) so
changing day values never re-sends emails already fired.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/email.js

@@ -585,36 +585,29 @@ export async function sendStudyReminderEmail(email, displayName, studyTitle, sec
   }
 }
 
-const REENGAGEMENT_COPY = {
-  '7d': {
-    subject: 'Your study is waiting for you',
-    eyebrow: 'Come Back',
-    headline: 'Pick up where you left off',
-    body: "It's been a week — your progress is saved and your next lesson is ready whenever you are.",
-    cta: 'Continue Studying',
-  },
-  '14d': {
-    subject: "Don't lose your momentum",
-    eyebrow: 'Still With You',
-    headline: 'Your spot is still saved',
-    body: 'Two weeks have passed, but every note and completed lesson is still right there. A little each day adds up.',
-    cta: 'Return to Your Study',
-  },
-  '30d': {
-    subject: 'Your progress is still here',
-    eyebrow: 'We Saved Your Spot',
-    headline: "It's been a month — come back anytime",
-    body: 'Your study progress is still intact and waiting. There\'s no deadline — come back whenever you\'re ready.',
-    cta: 'Open Your Study',
-  },
+const REENGAGEMENT_DEFAULTS = {
+  t1: { subject: 'Your study is waiting for you', body: "It's been a while — your progress is saved and your next lesson is ready whenever you are.", cta: 'Continue Studying' },
+  t2: { subject: "Don't lose your momentum", body: 'Every note and completed lesson is still right there. A little each day adds up — come back and continue.', cta: 'Return to Your Study' },
+  t3: { subject: 'Your progress is still here', body: "Your study progress is still intact and waiting. There's no deadline — come back whenever you're ready.", cta: 'Open Your Study' },
+}
+
+function getReengagementCopy(tier) {
+  const cfg = state.cachedSiteContent ?? {}
+  const t = tier === 't1' ? '1' : tier === 't2' ? '2' : tier === 't3' ? '3' : null
+  const def = REENGAGEMENT_DEFAULTS[tier] ?? REENGAGEMENT_DEFAULTS.t1
+  if (!t) return def
+  return {
+    subject: cfg[`studyReengagementT${t}Subject`]?.trim() || def.subject,
+    body: cfg[`studyReengagementT${t}Body`]?.trim() || def.body,
+    cta: cfg[`studyReengagementT${t}Cta`]?.trim() || def.cta,
+  }
 }
 
 export async function sendStudyReengagementEmail(email, displayName, studyTitle, studyUrl, tier, unsubUrl) {
   if (!process.env.RESEND_API_KEY) return
-  const copy = REENGAGEMENT_COPY[tier]
-  if (!copy) return
   try {
     const resend = new Resend(process.env.RESEND_API_KEY)
+    const copy = getReengagementCopy(tier)
     const namePart = typeof displayName === 'string' && displayName.trim() ? displayName.trim() : 'friend'
     const subject = `${copy.subject}${studyTitle ? ` — ${studyTitle}` : ''}`
     const bodyHtml = (
@@ -629,8 +622,8 @@ export async function sendStudyReengagementEmail(email, displayName, studyTitle,
       subject,
       text: `Hi ${namePart},\n\n${copy.body}${studyTitle ? ` Your current study: ${studyTitle}.` : ''}\n\n${studyUrl}\n\nGrace and peace,\nVerse by Verse with Nate${unsubUrl ? `\n\nUnsubscribe: ${unsubUrl}` : ''}`,
       html: buildBrandedEmailHtml({
-        title: copy.headline,
-        eyebrow: copy.eyebrow,
+        title: copy.subject,
+        eyebrow: 'Study Reminder',
         bodyHtml,
         ctaLabel: copy.cta,
         ctaUrl: studyUrl,

server/study-helpers.js

@@ -669,11 +669,13 @@ export async function scheduleStudyReminders(sendStudyReminderEmail) {
 
 // ── Study re-engagement scheduler ─────────────────────────────────────────
 
-const REENGAGEMENT_TIERS = [
-  { key: '7d', days: 7 },
-  { key: '14d', days: 14 },
-  { key: '30d', days: 30 },
-]
+function getReengagementTiers() {
+  const cfg = state.cachedSiteContent ?? {}
+  const raw = typeof cfg.studyReengagementDays === 'string' ? cfg.studyReengagementDays : '7,14,30'
+  const days = raw.split(',').map(s => parseInt(s.trim(), 10)).filter(n => !isNaN(n) && n > 0)
+  if (days.length === 0) return [{ key: 't1', days: 7 }, { key: 't2', days: 14 }, { key: 't3', days: 30 }]
+  return days.slice(0, 3).map((d, i) => ({ key: `t${i + 1}`, days: d }))
+}
 
 function makeUnsubUrl(userId) {
   const secret = process.env.RESEND_WEBHOOK_TOKEN ?? 'siteforge'
@@ -687,6 +689,7 @@ export async function scheduleReengagementEmails(sendStudyReengagementEmail) {
   if (!state.cachedSiteContent) return
   const now = new Date()
   const nowMs = now.getTime()
+  const tiers = getReengagementTiers()
 
   for (const user of state.studyUsers) {
     if (user.studyRemindersEnabled !== true) continue
@@ -713,7 +716,7 @@ export async function scheduleReengagementEmails(sendStudyReengagementEmail) {
       ? `${base}/study/${firstStudy.slug}`
       : `${base}/study`
 
-    for (const tier of REENGAGEMENT_TIERS) {
+    for (const tier of tiers) {
       if (daysSinceLogin < tier.days) continue
       if (sent[tier.key]) continue