Renders a Phoenix.Component function component to a safe HTML string for embedding inside <mj-raw> in an mjml_eex template.

mjml_eex is NOT HEEx-based (MjmlEEx.Component uses string-return functions, not HEEx). This module is the one-way bridge: HEEx function components → string → <mj-raw> block.

Call shape

iex> assigns = %{name: "Jo"}
iex> Accrue.Emails.HtmlBridge.render(&MyComponents.greeting/1, assigns)
"<p>Jo</p>"

Style discipline (D6-01 Pitfall 2)

Styles inside components MUST be inlined at the element level via the brand_style/1 helper in Accrue.Invoices.Components. MJML's post-render CSS inliner does not descend into <mj-raw> blocks, so any classname-only styling will be invisible inside the email shell.

Why this module exists

Phoenix.Component returns a Phoenix.LiveView.Rendered struct, which implements the Phoenix.HTML.Safe protocol. We don't need a LiveView mount context — we just call the function and convert the returned iodata to a binary.