feat(portal): /api/me/capabilities + cross-app menu links + real role label

PR 3 of 3 — final piece of the user-menu / profile / cross-app
chantier.

BFF
  * New `MeModule` ships `GET /api/me/capabilities`, a curated view
    derived from the active user-portal session. Returns
    `{ canAccessAdmin: boolean }` today; the shape is deliberately
    binary so the SPA cannot reconstruct the raw `roles` claim. 401
    on missing session, consistent posture with `/auth/me`.
  * ADR-0009 amended: new "Curated public view" section codifies
    the "no raw roles on `/auth/me`, capabilities is the release
    valve" stance; the routes table grows a row for the endpoint.

portal-shell
  * New `CapabilitiesService` (app-local) calls the BFF on auth-state
    flip and exposes `canAccessAdmin` as a signal. Anonymous
    sessions short-circuit to the all-false default without firing
    a request.
  * Header's `userMenuItems` is now a `computed` — the "Open Portal
    Admin" entry appears in the dropdown only when
    `canAccessAdmin()` is true, pointing at
    `environment.adminAppUrl`.
  * Sidebar role widget reads the auth + capabilities signals to
    render one of three labels ("Anonymous" / "User" /
    "Administrator") in place of the hardcoded "Anonymous".

portal-admin
  * Symmetric: unconditional "Open Portal Shell" entry in the admin
    user menu, pointing at `environment.shellAppUrl`. Anyone who
    can reach portal-admin can reach portal-shell, so no
    capabilities check needed.

i18n
  * `header.userMenu.openAdmin`, `sidebar.role.{administrator,user}`,
    `sidebar.role.aria` reshaped to take the role as a placeholder.

apps/portal-bff/src/app/app.module.ts

@@ -8,6 +8,7 @@ import { AdminModule } from '../admin/admin.module';
 import { AuditModule } from '../audit/audit.module';
 import { AuthModule } from '../auth/auth.module';
 import { DownstreamModule } from '../downstream/downstream.module';
+import { MeModule } from '../me/me.module';
 import { RedisModule } from '../redis/redis.module';
 import { SecurityModule } from '../security/security.module';
 import { SessionModule } from '../session/session.module';
@@ -25,6 +26,7 @@ import { UsersModule } from '../users/users.module';
     HealthModule,
     AdminModule,
     DownstreamModule,
+    MeModule,
     UsersModule,
   ],
   controllers: [AppController],

apps/portal-bff/src/me/me.controller.spec.ts

@@ -0,0 +1,82 @@
+import { UnauthorizedException } from '@nestjs/common';
+import type { Request } from 'express';
+import { MeController } from './me.controller';
+
+function makeReq(
+  user: {
+    oid: string;
+    tid: string;
+    username: string;
+    displayName: string;
+    amr: readonly string[];
+    roles: readonly string[];
+  } | null,
+): Request {
+  return { session: { user } } as unknown as Request;
+}
+
+describe('MeController', () => {
+  const controller = new MeController();
+
+  it('returns canAccessAdmin: true when the session carries Portal.Admin', () => {
+    const result = controller.capabilities(
+      makeReq({
+        oid: 'oid-1',
+        tid: 'tenant-1',
+        username: 'admin@apf.example',
+        displayName: 'Admin Smith',
+        amr: ['pwd', 'mfa'],
+        roles: ['Portal.Admin', 'Other.Role'],
+      }),
+    );
+    expect(result).toEqual({ canAccessAdmin: true });
+  });
+
+  it('returns canAccessAdmin: false when the session lacks Portal.Admin', () => {
+    const result = controller.capabilities(
+      makeReq({
+        oid: 'oid-2',
+        tid: 'tenant-1',
+        username: 'jane.doe@apf.example',
+        displayName: 'Jane Doe',
+        amr: ['pwd'],
+        roles: ['Other.Role'],
+      }),
+    );
+    expect(result).toEqual({ canAccessAdmin: false });
+  });
+
+  it('returns canAccessAdmin: false when the session carries no roles', () => {
+    const result = controller.capabilities(
+      makeReq({
+        oid: 'oid-3',
+        tid: 'tenant-1',
+        username: 'guest@apf.example',
+        displayName: 'Guest',
+        amr: [],
+        roles: [],
+      }),
+    );
+    expect(result).toEqual({ canAccessAdmin: false });
+  });
+
+  it('throws Unauthorized when no session is present', () => {
+    expect(() => controller.capabilities(makeReq(null))).toThrow(UnauthorizedException);
+  });
+
+  it('does NOT echo the raw roles array in the response (curated view contract)', () => {
+    const result = controller.capabilities(
+      makeReq({
+        oid: 'oid-4',
+        tid: 'tenant-1',
+        username: 'admin@apf.example',
+        displayName: 'Admin',
+        amr: ['pwd', 'mfa'],
+        roles: ['Portal.Admin', 'Confidential.Role'],
+      }),
+    );
+    expect(Object.keys(result)).toEqual(['canAccessAdmin']);
+    expect(JSON.stringify(result)).not.toContain('Confidential.Role');
+    expect(JSON.stringify(result)).not.toContain('Portal.Admin');
+  });
+});

apps/portal-bff/src/me/me.controller.ts

@@ -0,0 +1,79 @@
+import { Controller, Get, Req, UnauthorizedException } from '@nestjs/common';
+import { ApiCookieAuth, ApiOperation, ApiTags } from '@nestjs/swagger';
+import type { Request } from 'express';
+
+/**
+ * Curated capabilities derived from the active user-portal session,
+ * keyed by the binary access decisions the SPA needs to drive its
+ * own UI. Deliberately *not* a passthrough of `session.user.roles`:
+ * ADR-0009 §"curated public view" keeps the raw `roles` claim
+ * server-side; the SPA renders gates and cross-app links from the
+ * derived booleans this view exposes.
+ *
+ * Add a key when the SPA needs a new conditional rendering signal.
+ * Never add a key that hands back information not already deducible
+ * from the BFF's own server-side authorization decisions — the
+ * authoritative gate stays on the BFF guards (`@RequireAdmin`,
+ * `@RequireMfa`, …).
+ */
+export interface CapabilitiesView {
+  /**
+   * True when the session's roles include the `Portal.Admin` Entra
+   * app role — the SPA uses this to surface the "Open Portal Admin"
+   * entry in the user menu. The actual `/api/admin/*` access is
+   * gated server-side by `AdminRoleGuard`; this flag is UX only.
+   */
+  readonly canAccessAdmin: boolean;
+}
+
+const ADMIN_ROLE = 'Portal.Admin';
+
+/**
+ * `GET /api/me/capabilities` — projects the active session's roles
+ * onto a curated capabilities view consumed by `portal-shell`. The
+ * SPA calls this once per app boot (and on session refresh) to
+ * decide what to render: today, whether to expose the "Open Portal
+ * Admin" entry in the user menu; future keys land alongside as more
+ * conditional UI is required.
+ *
+ * Per ADR-0009 §"curated public view", the user-portal `/me` does
+ * NOT expose the raw `roles` claim — it stays server-side. This
+ * endpoint is the documented release-valve for binary UX hints,
+ * shaped so consumers can never reconstruct the raw role names.
+ *
+ * Mounted under `/api/me/*` rather than `/api/auth/*`: auth is the
+ * lifecycle (login, callback, /me identity, logout) — capabilities
+ * is a derived session view. Keeping the namespaces distinct gives
+ * the latter room to grow without bloating the auth surface.
+ *
+ * The path-routed session middleware in `main.ts` resolves this
+ * to the user-portal session (`portal_session`), so admin-only
+ * surfaces continue to be reached via `/api/admin/auth/me` for
+ * their identity payload and through the corresponding admin-side
+ * guards for authorization.
+ */
+@ApiTags('me')
+@ApiCookieAuth('portal_session')
+@Controller('me')
+export class MeController {
+  @ApiOperation({
+    summary: 'Curated capabilities derived from the active user-portal session',
+  })
+  @Get('capabilities')
+  capabilities(@Req() req: Request): CapabilitiesView {
+    const user = req.session.user;
+    if (!user) {
+      // Same posture as `/api/auth/me`: 401 (rather than 200 with
+      // every-flag-false) so the SPA can distinguish "no session"
+      // from "session exists but no flags". Keeps the consumer code
+      // path identical between the two reads.
+      throw new UnauthorizedException({
+        code: 'unauthenticated',
+        message: 'Unauthenticated',
+      });
+    }
+    return {
+      canAccessAdmin: user.roles.includes(ADMIN_ROLE),
+    };
+  }
+}

apps/portal-bff/src/me/me.module.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { MeController } from './me.controller';
+
+/**
+ * `MeModule` — owns `/api/me/*`, the namespace of session-derived
+ * curated views consumed by `portal-shell`. Currently ships the
+ * capabilities endpoint per ADR-0009 amendment; further projections
+ * (preferences, locale resolution, etc.) land under the same prefix.
+ */
+@Module({
+  controllers: [MeController],
+})
+export class MeModule {}