Lists: saved views (create, fork, update, delete, default)

Endpoints

Method	Path	Purpose
`GET`	`/api/lists/{id}/views`	every shared view on the list, plus this user's own personal views
`POST`	`/api/lists/{id}/views`	create a view — `{name, scope, config, isDefault}`
`POST`	`/api/lists/{id}/views/{viewId}`	fork a shared view into a personal copy owned by the caller — the escape hatch when someone else's shared view does not suit you
`PUT`	`/api/lists/{id}/views/{viewId}`	update name, config or default flag
`DELETE`	`/api/lists/{id}/views/{viewId}`	delete

Live-verified: GET → 200 {"views":[]}.

Service methods + models; the config payload shape confirmed live by creating a view from the web (or via a test write) before typing it strictly.
A view picker on the list detail, separating shared from personal views and marking the default.
Create / rename / set-default / delete, and Fork on a shared view.
Applying a view drives the grid's columns/filter/sort.
scope (shared vs personal) is explicit in the create UI.