Initial commit: notification-elements-demo app

Interactive Angular 19 demo for @sda/notification-elements-ui with
6 sections: Bell & Feed, Notification Center, Inbox, Comments &
Threads, Mention Input, and Full-Featured layout. Includes mock
data, dark mode toggle, and real-time event log.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

node_modules/@tufjs/models/dist/delegations.d.ts

@@ -0,0 +1,32 @@
+import { Key } from './key';
+import { DelegatedRole, SuccinctRoles } from './role';
+import { JSONObject, JSONValue } from './utils';
+type DelegatedRoleMap = Record<string, DelegatedRole>;
+type KeyMap = Record<string, Key>;
+interface DelegationsOptions {
+    keys: KeyMap;
+    roles?: DelegatedRoleMap;
+    succinctRoles?: SuccinctRoles;
+    unrecognizedFields?: Record<string, JSONValue>;
+}
+/**
+ * A container object storing information about all delegations.
+ *
+ * Targets roles that are trusted to provide signed metadata files
+ * describing targets with designated pathnames and/or further delegations.
+ */
+export declare class Delegations {
+    readonly keys: KeyMap;
+    readonly roles?: DelegatedRoleMap;
+    readonly unrecognizedFields?: Record<string, JSONValue>;
+    readonly succinctRoles?: SuccinctRoles;
+    constructor(options: DelegationsOptions);
+    equals(other: Delegations): boolean;
+    rolesForTarget(targetPath: string): Generator<{
+        role: string;
+        terminating: boolean;
+    }>;
+    toJSON(): JSONObject;
+    static fromJSON(data: JSONObject): Delegations;
+}
+export {};