email preview error when image attachment filename doesn't include extension

[batrachian]

Attempt to preview a MIME email with in-line image, the MIME info for the image filename doesn't include a filename extension:

No route matches {:action=>"more_asset", :asset=>"m_5593444617102028495_com_samsung_android_email_attachmentprovider_1_37047_RAW_1756857510038", :assetformat=>nil, :controller=>"attachments", :id=>#}, possible unmatched constraints: [:assetformat]
/usr/local/lib/ruby/gems/3.3/gems/actionpack-7.2.2.1/lib/action_dispatch/journey/formatter.rb:46:in `path'
/usr/local/lib/ruby/gems/3.3/gems/actionpack-7.2.2.1/lib/action_dispatch/routing/route_set.rb:868:in `url_for'
/usr/local/lib/ruby/gems/3.3/gems/actionpack-7.2.2.1/lib/action_dispatch/routing/route_set.rb:289:in `call'
/usr/local/lib/ruby/gems/3.3/gems/actionpack-7.2.2.1/lib/action_dispatch/routing/route_set.rb:345:in `block in define_url_helper'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/patches/attachment_patch.rb:97:in `asset_link'
/usr/local/lib/ruby/gems/3.3/gems/activesupport-7.2.2.1/lib/active_support/core_ext/object/try.rb:15:in `public_send'
/usr/local/lib/ruby/gems/3.3/gems/activesupport-7.2.2.1/lib/active_support/core_ext/object/try.rb:15:in `try'
(erb):5:in `block in list'
(erb):2:in `each'
(erb):2:in `list'
/usr/local/lib/ruby/gems/3.3/gems/erb-5.0.1/lib/erb.rb:427:in `eval'
/usr/local/lib/ruby/gems/3.3/gems/erb-5.0.1/lib/erb.rb:427:in `result'
/usr/local/www/redmine/plugins/redmine_more_previews/converters/cliff/lib/cliff.rb:378:in `list'
/usr/local/www/redmine/plugins/redmine_more_previews/converters/cliff/lib/cliff.rb:93:in `eml'
/usr/local/www/redmine/plugins/redmine_more_previews/converters/cliff/lib/cliff.rb:46:in `convert'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/conversion.rb:193:in `block in transient_preview'
/usr/local/lib/ruby/3.3/tmpdir.rb:99:in `mktmpdir'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/conversion.rb:186:in `transient_preview'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/conversion.rb:169:in `block in preview'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/conversion.rb:137:in `synchronize'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/conversion.rb:137:in `sync'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/conversion.rb:169:in `preview'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/converter.rb:265:in `convert'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/patches/attachment_patch.rb:37:in `more_preview'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/patches/attachments_controller_patch.rb:99:in `send_more_preview'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/patches/attachments_controller_patch.rb:61:in `block (2 levels) in more_preview'
/usr/local/lib/ruby/gems/3.3/gems/actionpack-7.2.2.1/lib/action_controller/metal/mime_responds.rb:224:in `respond_to'
/usr/local/www/redmine/plugins/redmine_more_previews/lib/redmine_more_previews/patches/attachments_controller_patch.rb:60:in `more_preview'

Trial-and-error determined that adding a file extension (.png) to the filename in the Content-Disposition line in the MIME header for the image resulted in success:

Content-Type: image/png; 
        name=m_5593444617102028495_com_samsung_android_email_attachmentprovider_1_37047_RAW_1756857510038
Content-Disposition: inline; 
        filename=m_5593444617102028495_com_samsung_android_email_attachmentprovider_1_37047_RAW_1756857510038.png
Content-Transfer-Encoding: base64
Content-ID: <ii_199120b2f4e259d3d302>
X-Attachment-Id: ii_199120b2f4e259d3d302

Unfortunately my Ruby-Fu is not yet up to determining a possible solution for this.