Fix: Display correct SmoothSchedule logo in email preview

Replaced the blank base64 encoded logo with the actual SmoothSchedule logo in the email rendering pipeline.

A Playwright E2E test was run to verify that the logo is correctly displayed in the email preview modal, ensuring it loads with natural dimensions and is visible.

frontend/src/puck/components/email/index.ts

@@ -0,0 +1,22 @@
+/**
+ * Email Template Components
+ *
+ * Puck components designed specifically for email templates.
+ * These render email-safe HTML with inline styles and table-based layout.
+ */
+
+export * from './types';
+
+// Components
+export { EmailLayout } from './EmailLayout';
+export { EmailHeader } from './EmailHeader';
+export { EmailHeading } from './EmailHeading';
+export { EmailText } from './EmailText';
+export { EmailButton } from './EmailButton';
+export { EmailDivider } from './EmailDivider';
+export { EmailSpacer } from './EmailSpacer';
+export { EmailImage } from './EmailImage';
+export { EmailPanel } from './EmailPanel';
+export { EmailTwoColumn } from './EmailTwoColumn';
+export { EmailFooter } from './EmailFooter';
+export { EmailBranding } from './EmailBranding';