## Changes
### Email Attachments
- Added `EmailAttachmentsField` component for uploading and managing
email attachments
- New `useUploadEmailAttachment` hook for handling file uploads with
size validation
- New `UPLOAD_EMAIL_ATTACHMENT_FILE` mutation for backend file
persistence
- Integrated attachments into email composer with file validation
- Added `EmailRecipientLimits` constant to enforce max recipients (100)
on frontend
### Open in App Click Action
- New `useOpenEmailInAppOrFallback` hook to open emails in the in-app
composer
- Email fields now default to "Open in app" action instead of "Open as
link"
- New `SettingsDataModelFieldOnClickActionForm` support for
`OPEN_IN_APP` action
- Email secondary table cell button now offers in-app composer as
alternative action
- `AttachmentChip` component moved from advanced-text-editor to file
module for reuse
### Refactoring & New Utilities
- Extracted `useComposeEmailForTargetRecord` hook for consistent email
composer opening
- New `useResolveDefaultEmailRecipient` hook to resolve recipient based
on record type
- New `getPrimaryEmailFromRecord` utility for safe email field access
- New `EmptyInboxPlaceholder` component with CTA button
- Simplified `ComposeEmailButton` using new hooks
- Enhanced `ComposeEmailCommand` to support bulk Person selections
- Updated `useSendEmail` to accept and forward attachments
- Recipient count validation with warning in composer footer
### Backend
- New `FileEmailAttachmentModule` with resolver and service
- New `file-email-attachment.command` for record selection menu items
- Updated `SendEmailInput` GraphQL type to include `files` field
- Email tool constants and exceptions updated
### Type Updates
- Added `SendEmailAttachmentInput` GraphQL type
- Added `FileFolder.EMAIL_ATTACHMENT` to file folder interface
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Félix Malfait