[Share By Email] Preserve special characters in email subjects

[JamBalaya56562]

Summary

• preserve special characters in Share By Email subjects instead of XML-encoding them
• bump the Share By Email extension version to 0.3.4

Root cause

Minz_Request::paramString() XML-encodes special characters by default. As a result, a subject such as "word" was passed to PHPMailer as "word" and displayed that way by email clients.

Reading the subject with plaintext: true keeps the original text for PHPMailer, including quotation marks, ampersands, and non-ASCII characters.

Fixes #342

Validation

• confirmed the default and plaintext: true behavior in Minz_Request::paramString()
• reviewed the subject data flow from the POST parameter to ShareByEmail\mailers\Share and PHPMailer
• confirmed the diff is limited to the Share By Email controller and metadata

PHPStan and PHPCS were not run locally because PHP is unavailable in the local environment. They are expected to run in GitHub Actions.

[mo74m3ed]

mo74m3ed@hotmail.com