Roos-fs-ZIP

User Story:
As a sales employee, I want to manually create, read, update, and delete lead entries.

Acceptance Criteria:

• Form fields correspond to the fields in the Excel template (attached)
• Required fields must be validated before saving (email, phone number, name of the company)
• User receives feedback if a lead with matching name, phone, or email already exists
• User is prompted to confirm if they still want to proceed
• the creation is performed in a seperate window (area)
• when deleting the user is requested to confirm the action