Im building the same thing. What i did is that i created a core package:

• Login
• Dashboard
• Settings
• Admin theme

Then i created other package that extends the core package to keep it modular. It used the admin theme from the core package.

This way you can keep the packages structured with their own files, views, lang, css, js etc.

Thanks for your response Justin.

So your core module contains all the logic for modules like 'Login', 'Dashboard', 'Settings' and 'Admin'? I would love to hear how this is set up. Also, what is "the other package" and how do you extend a module? Do you mean extend other module's classes or in what way?