Add Q&A answered email template to admin Email Templates panel; v1.0.11

- content.ts: add qaAnsweredEmailSubject/Body/CtaLabel/Signoff fields + defaults
- email.js: buildQuestionAnsweredEmailTemplate reads from cachedSiteContent
- AdminPage.tsx: add EmailTemplateCard entry for Q&A answered notification

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

src/content.ts

@@ -239,6 +239,11 @@ export interface SiteContent {
   twoFaOtpEmailSubject: string
   twoFaOtpEmailBody: string
   twoFaOtpEmailExpiry: string
+  // ── Q&A Answered Notification ──
+  qaAnsweredEmailSubject: string
+  qaAnsweredEmailBody: string
+  qaAnsweredEmailCtaLabel: string
+  qaAnsweredEmailSignoff: string
   // ── Header ──
   headerFollowLabel: string
   // ── Cookie banner ──
@@ -430,6 +435,10 @@ export const DEFAULTS: SiteContent = {
   twoFaOtpEmailSubject: 'Your sign-in code — Verse by Verse with Nate',
   twoFaOtpEmailBody: 'Your two-factor sign-in code is below. Enter it to complete sign-in.',
   twoFaOtpEmailExpiry: 'This code expires in 10 minutes. If you did not request this, you can ignore this message.',
+  qaAnsweredEmailSubject: 'Your question has been answered — Verse by Verse with Nate',
+  qaAnsweredEmailBody: 'Nate has answered your question on Verse by Verse with Nate.',
+  qaAnsweredEmailCtaLabel: 'Read Full Answer →',
+  qaAnsweredEmailSignoff: 'Grace and peace,\nNate',
   headerFollowLabel: 'Follow on Spotify',
   cookieBannerText: 'We use optional analytics cookies to better understand how people find and engage with this content. By accepting, you allow us to measure how you interact with the site — no personal data is sold or shared.',
   customLinks: [],