Make sure collections have trailing slashes (py-caldav is very pedantic about that)

crates/dav/src/resource/methods/propfind.rs

@@ -76,8 +76,13 @@ pub(crate) async fn route_propfind<R: ResourceService>(
     let mut member_responses = Vec::new();
     if depth != &Depth::Zero {
         for member in resource_service.get_members(path_components).await? {
+            // Collections should have a trailing slash
+            let mut name = member.get_name();
+            if R::IS_COLLECTION {
+                name.push('/')
+            }
             member_responses.push(member.propfind_typed(
-                &format!("{}/{}", path.trim_end_matches('/'), member.get_name()),
+                &format!("{}/{}", path.trim_end_matches('/'), name),
                 &propfind_member.prop,
                 puri,
                 principal,

crates/dav/src/resource/resource_service.rs

@@ -18,6 +18,7 @@ pub trait ResourceService: Clone + Sized + Send + Sync + AxumMethods + 'static {
     type PrincipalUri: PrincipalUri;
 
     const DAV_HEADER: &'static str;
+    const IS_COLLECTION: bool;
 
     async fn get_members(
         &self,