Properly handle bad aritst/release URLs

src/lms/ui/LmsApplication.cpp

@@ -326,7 +326,7 @@ LmsApplication::handleException(LmsApplicationException& e)
 	Wt::WPushButton* btn {t->bindNew<Wt::WPushButton>("btn-go-home", Wt::WString::tr("Lms.Error.go-home"))};
 	btn->clicked().connect([this]()
 	{
-		redirect(".");
+		redirect(defaultPath);
 	});
 }
 

src/lms/ui/explore/ArtistView.cpp

@@ -71,7 +71,7 @@ Artist::refreshView()
 
 	const auto artistId {StringUtils::readAs<Database::IdType>(wApp->internalPathNextPart("/artist/"))};
 	if (!artistId)
-		return;
+		throw ArtistNotFoundException {*artistId};
 
 	const std::vector<Database::IdType> similarArtistIds {Service<Recommendation::IEngine>::get()->getSimilarArtists(LmsApp->getDbSession(), *artistId, 5)};
 

src/lms/ui/explore/ReleaseView.cpp

@@ -74,7 +74,7 @@ Release::refreshView()
 
 	const auto releaseId {StringUtils::readAs<Database::IdType>(wApp->internalPathNextPart("/release/"))};
 	if (!releaseId)
-		return;
+		throw ReleaseNotFoundException {*releaseId};
 
 	const std::vector<Database::IdType> similarReleasesIds {Service<Recommendation::IEngine>::get()->getSimilarReleases(LmsApp->getDbSession(), *releaseId, 6)};