Refactor routing in App component to enhance navigation and improve error handling by integrating dynamic routes and updating the NotFound route.

node_modules/dset/merge/index.mjs

@@ -0,0 +1,26 @@
+export function merge(a, b, k) {
+	if (typeof a === 'object' && typeof b === 'object')  {
+		if (Array.isArray(a) && Array.isArray(b)) {
+			for (k=0; k < b.length; k++) {
+				a[k] = merge(a[k], b[k]);
+			}
+		} else {
+			for (k in b) {
+				if (k === '__proto__' || k === 'constructor' || k === 'prototype') break;
+				a[k] = merge(a[k], b[k]);
+			}
+		}
+		return a;
+	}
+	return b;
+}
+
+export function dset(obj, keys, val) {
+	keys.split && (keys=keys.split('.'));
+	var i=0, l=keys.length, t=obj, x, k;
+	while (i < l) {
+		k = ''+keys[i++];
+		if (k === '__proto__' || k === 'constructor' || k === 'prototype') break;
+		t = t[k] = (i === l) ? merge(t[k],val) : (typeof(x=t[k])===typeof keys) ? x : (keys[i]*0 !== 0 || !!~(''+keys[i]).indexOf('.')) ? {} : [];
+	}
+}