v3.0.4
The MailResource was hardcoded to use '__('Emails')' as the navigation group,
ignoring the 'filament-mails.navigation.group' configuration option.
This change updates the getNavigationGroup() method to read from the config
with a fallback to the previous default value, allowing users to customize
the navigation group as intended.
Fixes #58
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Co-authored-by: Claude <noreply@anthropic.com>