fix(gro-1866): add session-from-auth portal endpoint and role scope

Adds POST /api/portal/session-from-auth which bridges a valid Better Auth
customer session (from SSO login) to a portal impersonation session, so
real SSO customers can access the client portal.

The endpoint is registered before the validatePortalSession catch-all so it
is not subject to that middleware. It validates the Better Auth session
from request cookies, looks up the client by email, creates an active
impersonation session, and returns { sessionId, clientId, clientName }.

Also adds "role" to the genericOAuth scopes so Authentik propagates the
role claim into Better Auth user objects (GRO-1862 root cause fix).

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/__tests__/portalSessionFromAuth.test.ts

@@ -0,0 +1,176 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { Hono } from "hono";
+
+const CLIENT_ID = "550e8400-e29b-41d4-a716-446655440001";
+const CLIENT_EMAIL = "alice@example.com";
+const CLIENT_NAME = "Alice Smith";
+
+const BETTER_AUTH_SESSION = {
+  user: {
+    id: "auth-user-001",
+    email: CLIENT_EMAIL,
+    name: CLIENT_NAME,
+  },
+  session: {
+    id: "ba-session-001",
+    expiresAt: new Date(Date.now() + 60 * 60 * 1000),
+  },
+};
+
+const MOCK_CLIENT = {
+  id: CLIENT_ID,
+  email: CLIENT_EMAIL,
+  name: CLIENT_NAME,
+};
+
+let mockGetAuth: ReturnType<typeof vi.fn>;
+let mockGetSession: ReturnType<typeof vi.fn>;
+let insertedSession: Record<string, unknown> | null = null;
+let mockClientRow: Record<string, unknown> | null = null;
+let mockStaffRow: Record<string, unknown> | null = null;
+
+function makeChainable(data: unknown[]): unknown {
+  const arr = [...data];
+  return new Proxy(arr, {
+    get(target, prop) {
+      if (prop === "where" || prop === "orderBy" || prop === "limit") {
+        return () => makeChainable(target);
+      }
+      // @ts-expect-error proxy
+      return target[prop];
+    },
+  });
+}
+
+vi.mock("@groombook/db", () => {
+  const impersonationSessions = new Proxy(
+    { _name: "impersonationSessions" },
+    { get: (t, p) => (p === "_name" ? "impersonationSessions" : { table: "impersonationSessions", column: p }) }
+  );
+
+  const clients = new Proxy(
+    { _name: "clients" },
+    { get: (t, p) => (p === "_name" ? "clients" : { table: "clients", column: p }) }
+  );
+
+  const staff = new Proxy(
+    { _name: "staff" },
+    { get: (t, p) => (p === "_name" ? "staff" : { table: "staff", column: p }) }
+  );
+
+  return {
+    getDb: () => ({
+      select: () => ({
+        from: (table: { _name: string }) => {
+          if (table._name === "clients") {
+            return makeChainable(mockClientRow ? [mockClientRow] : []);
+          }
+          if (table._name === "staff") {
+            return makeChainable(mockStaffRow ? [mockStaffRow] : []);
+          }
+          return makeChainable([]);
+        },
+      }),
+      insert: () => ({
+        into: (table: { _name: string }) => ({
+          values: (vals: Record<string, unknown>) => ({
+            returning: () => {
+              if (table._name === "impersonationSessions") {
+                insertedSession = { id: "new-session-001", ...vals };
+                return [insertedSession];
+              }
+              return [];
+            },
+          }),
+        }),
+      }),
+    }),
+    impersonationSessions,
+    clients,
+    staff,
+    eq: vi.fn(),
+    and: vi.fn(),
+    inArray: vi.fn(),
+  };
+});
+
+vi.mock("../lib/auth.js", () => ({
+  getAuth: vi.fn(),
+}));
+
+const { portalRouter } = await import("../routes/portal.js");
+
+const app = new Hono();
+app.route("/portal", portalRouter);
+
+describe("POST /portal/session-from-auth", () => {
+  beforeEach(() => {
+    insertedSession = null;
+    mockClientRow = null;
+    mockStaffRow = null;
+    mockGetSession = vi.fn();
+    mockGetAuth = vi.fn(() => ({
+      api: {
+        getSession: mockGetSession,
+      },
+    }));
+    vi.mocked(getAuth).mockImplementation(mockGetAuth);
+  });
+
+  it("returns 401 when no Better Auth session", async () => {
+    mockGetSession.mockResolvedValue(null);
+    const res = await app.request("/portal/session-from-auth", {
+      method: "POST",
+    });
+    expect(res.status).toBe(401);
+    const body = await res.json();
+    expect(body.error).toBe("Unauthorized");
+  });
+
+  it("returns 404 when authenticated user has no client record", async () => {
+    mockGetSession.mockResolvedValue(BETTER_AUTH_SESSION);
+    mockClientRow = null;
+    const res = await app.request("/portal/session-from-auth", {
+      method: "POST",
+    });
+    expect(res.status).toBe(404);
+    const body = await res.json();
+    expect(body.error).toBe("No client record found for this user");
+  });
+
+  it("returns a portal session with sessionId, clientId, clientName when client is found", async () => {
+    mockGetSession.mockResolvedValue(BETTER_AUTH_SESSION);
+    mockClientRow = MOCK_CLIENT;
+    mockStaffRow = { id: "00000000-0000-0000-0000-000000000001" };
+    const res = await app.request("/portal/session-from-auth", {
+      method: "POST",
+    });
+    expect(res.status).toBe(201);
+    const body = await res.json();
+    expect(body).toHaveProperty("sessionId");
+    expect(body).toHaveProperty("clientId", CLIENT_ID);
+    expect(body).toHaveProperty("clientName", CLIENT_NAME);
+  });
+
+  it("creates a portal session with reason sso-bridge", async () => {
+    mockGetSession.mockResolvedValue(BETTER_AUTH_SESSION);
+    mockClientRow = MOCK_CLIENT;
+    mockStaffRow = { id: "00000000-0000-0000-0000-000000000001" };
+    const res = await app.request("/portal/session-from-auth", {
+      method: "POST",
+    });
+    expect(res.status).toBe(201);
+    expect(insertedSession).not.toBeNull();
+    expect((insertedSession as Record<string, unknown>).reason).toBe("sso-bridge");
+  });
+
+  it("returns 503 when auth is not configured", async () => {
+    mockGetAuth.mockImplementation(() => {
+      throw new Error("Auth not initialized");
+    });
+    const res = await app.request("/portal/session-from-auth", {
+      method: "POST",
+    });
+    expect(res.status).toBe(503);
+  });
+});