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/types/index.ts

@@ -13,6 +13,7 @@ export interface BaseEmailDocument {
   cc?: string[] | null
   bcc?: string[] | null
   from?: string | null
+  fromName?: string | null
   replyTo?: string | null
   subject: string
   html: string
@@ -83,6 +84,7 @@ export interface QueuedEmail {
   cc?: string[] | null
   bcc?: string[] | null
   from?: string | null
+  fromName?: string | null
   replyTo?: string | null
   subject: string
   html: string