Global error page: ErrorView with per-status copy, did-you-mean suggestions, error ids from handleError, static error.html; 404 instead of 500 for bad progress ids; tolerate full header line in DAISY_TASK_WEBHOOK_HEADER and stop logging raw fetch errors

src/app.d.ts

@@ -4,7 +4,11 @@
 // for information about these interfaces
 declare global {
 	namespace App {
-		// interface Error {}
+		interface Error {
+			message: string;
+			/** Short id of an unexpected (5xx) error, also in the server log line. */
+			id?: string;
+		}
 		interface Locals {
 			user: typeof import('#lib/server/auth.js').auth.$Infer.Session.user | null;
 			session: typeof import('#lib/server/auth.js').auth.$Infer.Session.session | null;