Pubvana-CMS/pubvana ? reverse-engineered prompt

Build me a lean blogging and small business CMS called Pubvana, with a clean public website and a modern admin area where I can log in, create and manage posts and pages, and customize the site without much fuss.

I want it to support themes, plugins, and widgets, with a way to browse or install add ons from a marketplace style area. It should also have two content editing options, basic authentication for admins, and simple tools for things like scheduling posts, checking broken links, and importing content from WordPress. Make it feel fast and uncluttered, not bloated.

Set it up so it runs on a typical PHP hosting setup, with a public folder, an installer or easy setup flow, and sensible defaults for local or production use. If you need to look up current docs online for any CodeIgniter or Shield details, go ahead and do that.