Braze email templates

We have quetions about email templating.

1. Is it possible to validate email templates, for example - check whether certain elements such as Buttons and images have URLs? We are creating content blocks and we want to make sure they contain expected value types.
2. How to prevent changing the styles of an element? For example, we create a content block and the editor should not be able to change the typography styles of the content block when he/she imports and uses it.
3. How to disable automatic color inversion for dark mode on Email clients? Our main theme is light and we don't want to customize our email for dark mode.
4. How to achieve "View in Browser" feature? I read a response in FAQ. I would like to understand how we can automate creating web pages from emails. Is there an event we can listen to and make a webpage that can pull Email for us to process and host?
5. How can we pass variables from template to content blocks when content blocks are added via Liquid code? Let's say there is a button block that should render text inside dynamically. We want this text to be passed from its consumer template.

6. How to remove elements such as Button, Text, Image if they don't have data before sending email?