fix(api,web): movie delete always removes files

Drop the delete_files choice: removing a movie now always unlinks
its §7.4 library folder. Removes the query flag from DELETE
/api/movies/{id} and the OpenAPI params, and the toggle from the UI
confirmation panel — the confirmation itself stays. Path-safety and
torrent-untouched behaviour are unchanged.

Closes #110

crates/arr-api/src/lib.rs

@@ -23,8 +23,7 @@ use utoipa_scalar::{Scalar, Servable};
 
 pub use health::{Check, Health, HealthReport, Status};
 pub use movies::{
-    Accepted, AttentionQueues, CreateMovie, DeleteMovieQuery, ErrorBody, Movie, MovieFile, Release,
-    UpdateMovie,
+    Accepted, AttentionQueues, CreateMovie, ErrorBody, Movie, MovieFile, Release, UpdateMovie,
 };
 pub use owners::{CreateOwner, Owner, UpdateOwner};
 pub use roots::Root;