Can you do ANY of these with an Extension?

[planetrocke]

Do you know how to do any of the other items, or is this not possible?

[planetrocke]

This item is not permitted by LICENSE

Thank you, good to know.

[tanya]

3. Modify Espo footer branding

This item is not permitted by LICENSE

[planetrocke]

I would like to do the following and need to do so with an extension....

1. Hide everything except Clear Local Cache and Logout for all users expect for Admin
2. Hide sidebar stuff on admin page (espo news)
3. Modify Espo footer branding
4. Modify what is in the Email Subject: applications/Espo/resources/i18n/en_US/user.json
5. Add buttons for Log a Call and Schedule an Appointment on Lead and Contact screen next to Edit
6. Customize the CSS (overriding default)

I know basically what needs changed in core modification method, but I need to do this in a custom module and I'm having some difficulty, I don't know what is possible and what is not.