web: further refinements to the sidebar

This commit restores the onHashChange functionality, using an
on-demand reverse map (there really aren't that many objects in the
nav tree) to make sure all of the parent entities are also listed
in the "expanded" listing to make sure the target object is still
visible.  Along the way, several type lever errors were corrected.
Two major pieces of functionality were extracted from the Sidebar
function as they're mostly consumers/filters of the information
provided, and don't need to be in the Sidebar itself.

web/src/elements/sidebar/utils.ts

@@ -0,0 +1,46 @@
+import { ROUTE_SEPARATOR } from "@goauthentik/common/constants";
+
+import { SidebarEntry } from "./types";
+
+export function entryKey(entry: SidebarEntry) {
+    return `${entry.path || "no-path"}:${entry.label}`;
+}
+
+export function makeParentMap(entries: SidebarEntry[]) {
+    const reverseMap = new WeakMap<SidebarEntry, SidebarEntry>();
+    function reverse(entry: SidebarEntry) {
+        (entry.children ?? []).forEach((e) => {
+            reverseMap.set(e, entry);
+            reverse(e);
+        });
+    }
+    entries.forEach(reverse);
+    return reverseMap;
+}
+
+function scanner(entry: SidebarEntry, activePath: string): SidebarEntry | undefined {
+    for (const matcher of entry.attributes?.activeWhen ?? []) {
+        const matchtest = new RegExp(matcher);
+        if (matchtest.test(activePath)) {
+            return entry;
+        }
+        const match: SidebarEntry | undefined = (entry.children ?? []).find((e) =>
+            scanner(e, activePath),
+        );
+        if (match) {
+            return match;
+        }
+    }
+    return undefined;
+}
+
+export function findMatchForNavbarUrl(entries: SidebarEntry[]) {
+    const activePath = window.location.hash.slice(1, Infinity).split(ROUTE_SEPARATOR)[0];
+    for (const entry of entries) {
+        const result = scanner(entry, activePath);
+        if (result) {
+            return result;
+        }
+    }
+    return undefined;
+}