# `MailglassAdmin.Preview.Sidebar`
[🔗](https://github.com/szTheory/mailglass/blob/v1.0.0/lib/mailglass_admin/preview/sidebar.ex#L1)

Sidebar function component: mailable list with collapsible scenario
groups + status badges.

Renders the structure documented in 05-UI-SPEC §Sidebar structure
(lines 188-207 + 234-263). Branches on the second element of each
`{mod, reflection}` tuple from `MailglassAdmin.Preview.Discovery.discover/1`:

  * `list when is_list(list)` — healthy mailable; render `<details>/<summary>`
    with scenario links. Active scenario gets a 3px Glass left border;
    inactive gets `border-transparent` + hover state.
  * `:no_previews` — stub mailable; shows the literal copy
    "No previews defined" per UI-SPEC Copywriting Contract line 457.
  * `{:error, _}` — preview_props/0 raised during discovery; shows a
    warning badge (via `MailglassAdmin.Components.badge/1`).

Boundary classification: submodule auto-classifies into the
`MailglassAdmin` root boundary.

# `mailable_entry`

## Attributes

* `mod` (`:atom`) (required)
* `reflection` (`:any`) (required)
* `current_mailable` (`:atom`) - Defaults to `nil`.
* `current_scenario` (`:atom`) - Defaults to `nil`.

# `sidebar`
*since 0.1.0* 

Renders the mailable sidebar.

`mailables` is the list of `{module, reflection}` tuples produced by
`MailglassAdmin.Preview.Discovery.discover/1`. `current_mailable` and
`current_scenario` drive the active-item highlight.

## Attributes

* `mailables` (`:list`) (required)
* `current_mailable` (`:atom`) - Defaults to `nil`.
* `current_scenario` (`:atom`) - Defaults to `nil`.

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*Consult [api-reference.md](api-reference.md) for complete listing*