fix: Bug - Users appear as both online and offline

Align chat message sender ids with per-server presence identities so profile cards opened from message authors resolve the same live user state as the members panel.

Co-authored-by: Cursor <cursoragent@cursor.com>

toju-app/src/app/store/users/user-identity-lookup.rules.spec.ts

@@ -0,0 +1,49 @@
+import type { User } from '../../shared-kernel';
+import {
+  buildUserIdentityLookup,
+  findUserEntityByIdentity,
+  resolveUserByIdentity
+} from './user-identity-lookup.rules';
+
+function createUser(overrides: Partial<User> = {}): User {
+  return {
+    id: 'server-user-1',
+    oderId: 'server-user-1',
+    username: 'alice',
+    displayName: 'Alice',
+    status: 'online',
+    role: 'member',
+    joinedAt: 1,
+    presenceServerIds: ['room-1'],
+    isOnline: true,
+    ...overrides
+  };
+}
+
+describe('user-identity-lookup.rules', () => {
+  it('indexes id, oderId, and peerId aliases in buildUserIdentityLookup', () => {
+    const user = createUser({
+      id: 'server-user-1',
+      oderId: 'oder-1',
+      peerId: 'peer-1'
+    });
+    const lookup = buildUserIdentityLookup([user]);
+
+    expect(resolveUserByIdentity(lookup, 'server-user-1')).toBe(user);
+    expect(resolveUserByIdentity(lookup, 'oder-1')).toBe(user);
+    expect(resolveUserByIdentity(lookup, 'peer-1')).toBe(user);
+  });
+
+  it('findUserEntityByIdentity resolves users keyed by a different entity id', () => {
+    const user = createUser({
+      id: 'server-user-1',
+      oderId: 'oder-1'
+    });
+    const entities = {
+      'server-user-1': user
+    };
+
+    expect(findUserEntityByIdentity(entities, 'oder-1')).toBe(user);
+    expect(findUserEntityByIdentity(entities, 'home-user-1')).toBeUndefined();
+  });
+});