- Implemented the full Fat Bottom Grille storefront and staff dashboard.

Highlights include configurable menus, specials, cart/checkout, taxes, 
customer accounts with email 2FA, newsletters, analytics, refunds, 
PDF/CSV exports, Square/Mailgun adapters, and optional MySQL migration.

See README.md for setup and production configuration. Verified 
PHP/JavaScript syntax, responsive layouts, registration, 2FA, checkout, 
dashboard workflows, settings persistence, and PDF generation.
Real Square, Mailgun, and MySQL connections require credentials/server 
access. Square implementation follows the official Payments API and 
Refunds API.

views/admin/newsletters.php

@@ -0,0 +1,29 @@
+<div class="admin-page-actions">
+    <p><strong><?= (int) $recipientCount ?></strong> active users are currently opted in.</p>
+</div>
+
+<div class="admin-detail-grid newsletter-grid">
+    <section class="admin-panel">
+        <div class="admin-panel-heading"><div><span class="eyebrow">Send an update</span><h2>New Newsletter</h2></div></div>
+        <form class="form-stack" action="/admin/newsletters/send" method="post">
+            <?= csrf_field() ?>
+            <label>Subject line<input type="text" name="subject" maxlength="140" required placeholder="This weekend at Fat Bottom Grille"></label>
+            <label>Message<textarea name="content" rows="12" required placeholder="Share a new special, schedule update, or note from the kitchen..."></textarea></label>
+            <div class="notice">Every email includes an unsubscribe link. Users can also opt out from My Account.</div>
+            <button class="button button-large button-block" type="submit" data-confirm="Send this newsletter to every opted-in user?">Send to <?= (int) $recipientCount ?> Subscribers</button>
+        </form>
+    </section>
+    <section class="admin-panel">
+        <div class="admin-panel-heading"><div><span class="eyebrow">Delivery history</span><h2>Past Sends</h2></div></div>
+        <div class="newsletter-history">
+            <?php if (!$newsletters): ?><p class="muted">No newsletters have been sent yet.</p><?php endif; ?>
+            <?php foreach ($newsletters as $newsletter): ?>
+                <article>
+                    <div><strong><?= e($newsletter['subject']) ?></strong><span><?= e(store_datetime((string) ($newsletter['sent_at'] ?: $newsletter['created_at']))) ?></span></div>
+                    <span class="role-badge"><?= (int) $newsletter['recipient_count'] ?> sent</span>
+                    <small>by <?= e($newsletter['author'] ?: 'System') ?></small>
+                </article>
+            <?php endforeach; ?>
+        </div>
+    </section>
+</div>