Type-inferred assigns form per 05-UI-SPEC §"Assigns form — type-inferred fields" (lines 354-368) + 05-RESEARCH.md lines 1470-1571.
Walks the scenario defaults map and renders an input per key dispatched by the Elixir type of the default value:
| Type | Input |
|---|---|
binary (String) | <input type="text"> |
integer | <input type="number" step="1"> |
float | <input type="number" step="any"> |
boolean | <input type="checkbox"> |
atom | disabled text input (v0.1 — URL edit only) |
DateTime | <input type="datetime-local"> |
Date | <input type="date"> |
| struct | <textarea> JSON (struct label) |
map | <textarea> JSON (plain map) |
| fallback | disabled <input> "(unsupported type)" |
Form fires phx-change="assigns_changed" on every field edit; the
LiveView re-calls the mailable function with updated assigns and pipes
through Mailglass.Renderer.render/1.
Action buttons use the verb+noun copy locked in 05-UI-SPEC Copywriting Contract lines 453-458: "Render preview" + "Reset assigns". The voice test greps the rendered HTML for these exact strings.
Boundary classification: submodule auto-classifies into the
MailglassAdmin root boundary.