Add fromName field support to emails collection

- Add fromName field to Emails collection schema for sender display name
- Update BaseEmailDocument and QueuedEmail interfaces to include fromName
- Add SendEmailTaskInput support for fromName field in job tasks
- Update MailingService to combine fromName and from into proper "Name <email>" format
- Add fromName, from, and replyTo fields to job input schema for admin UI
- Update field copying logic to handle new sender-related fields

Users can now specify a display name for emails (e.g., "John Doe <john@example.com>").

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/services/MailingService.ts

@@ -238,8 +238,16 @@ export class MailingService implements IMailingService {
         id: emailId,
       }) as BaseEmailDocument
 
+      // Combine from and fromName for nodemailer
+      let fromField = email.from
+      if (email.fromName && email.from) {
+        fromField = `"${email.fromName}" <${email.from}>`
+      } else if (email.from) {
+        fromField = email.from
+      }
+
       const mailOptions = {
-        from: email.from,
+        from: fromField,
         to: email.to,
         cc: email.cc || undefined,
         bcc: email.bcc || undefined,