Improve +error.svelte handling

src/routes/board/+page.ts

@@ -12,7 +12,7 @@ export const load: PageLoad = async ({ url, fetch }) => {
 	if (!locId) {
 		error(400, {
 			message: 'Location not provided',
-			owlCode: 'NO_LOCATION_IN_PATH'
+			code: 'VALIDATION'
 		});
 	}
 
@@ -21,7 +21,7 @@ export const load: PageLoad = async ({ url, fetch }) => {
 	if (!BoardLocation) {
 		error(404, {
 			message: `Location (${locId.toUpperCase()}) not found`,
-			owlCode: 'INVALID_LOCATION_CODE'
+			code: 'VALIDATION'
 		});
 	}
 	const title = BoardLocation.n || BoardLocation.t || 'Live Arr/Dep';
@@ -35,12 +35,6 @@ export const load: PageLoad = async ({ url, fetch }) => {
 			boardData
 		};
 	} catch (e: unknown) {
-		if (e instanceof TypeError && e.message === 'Failed to fetch') {
-			error(503, {
-				message: 'Cannot connect to the OwlBoard server',
-				owlCode: 'NETWORK_DISCONNECTED'
-			});
-		}
 		throw e;
 	}
 };