VSB-TUO/Context language when sending the archive email upon submission

[Paurikova2]

Phases	MP	MM	MB	MR	JM	Total
ETA	0	0	0	0	0	0
Developing	2	0	0	0	0	0
Review	0	0	0	0	0	0
Total	-	-	-	-	-	0
ETA est.						0
ETA cust.	-	-	-	-	-	0

Problem Description

The system does not send the email in English when I create an item — it always sends it in Czech.

Solution

Use the context language when sending the archive email upon submission.

[Copilot]

Pull Request Overview

This PR fixes the language localization issue where submission archive emails were always sent in Czech instead of the user's preferred language. The change uses the context's current locale instead of the submitter's EPerson locale when determining the email template language.

• Modified email template selection to use context locale instead of EPerson locale
• Removes unused locale variable that was fetching the EPerson's locale

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Paurikova2]

@milanmajchrak we also have to add this to UFAL