feat(rbac): no role at registration; invitation-based membership; nav gating

- Registration no longer asks for a role/persona (removed the role select +
  allottee block); crm.account.register sends no persona.
- New users have no permissions → the sidebar now shows only Dashboard + Profile
  for them, gated on crm.account.me (membership + permissions). Members see the
  areas their permissions allow.
- Add /portal/invite?token=… : accepts the invite for a signed-in registered
  user, or routes an unregistered invitee through register/onboarding, which
  redeems the stashed token on completion (granting the invited role).
- Team Management: 'Copy link' on pending invites builds the invite link from
  the invitation token (no email delivery yet).

src/lib/access.ts

@@ -0,0 +1,66 @@
+"use client";
+
+import { useQuery } from "@abe-kap/appshell-sdk/react";
+import { isShellConfigured } from "./appshell";
+
+/**
+ * The signed-in user's effective CRM access, from crm.account.me. Drives navigation
+ * gating: a user with no membership/permissions sees only Dashboard + Profile; members
+ * see the areas their permissions allow.
+ *
+ * Every CRM permission id, granted to superadmins / owners. Used as the mock default
+ * when the Shell isn't configured (local demo shows everything).
+ */
+export const ALL_CRM_PERMISSIONS = [
+  "leads.manage", "pipeline.manage", "estimates.create", "dispatch.manage",
+  "reports.view", "billing.view", "team.manage", "roles.manage", "settings.manage",
+] as const;
+
+export interface MyAccess {
+  registered: boolean;
+  isMember: boolean;
+  roleSlugs: string[];
+  permissions: string[];
+  isSuperadmin: boolean;
+  /** True while the access query is still resolving (nav stays minimal until then). */
+  loading: boolean;
+  can: (permission: string) => boolean;
+}
+
+interface MeDTO {
+  registered: boolean;
+  isMember: boolean;
+  roleSlugs: string[];
+  permissions: string[];
+  isSuperadmin: boolean;
+}
+
+function useLiveAccess(): MyAccess {
+  const { data, loading } = useQuery<MeDTO>("crm.account.me");
+  const permissions = data?.permissions ?? [];
+  return {
+    registered: data?.registered ?? false,
+    isMember: data?.isMember ?? false,
+    roleSlugs: data?.roleSlugs ?? [],
+    permissions,
+    isSuperadmin: data?.isSuperadmin ?? false,
+    loading,
+    can: (p: string) => permissions.includes(p),
+  };
+}
+
+function useMockAccess(): MyAccess {
+  // No Shell (local demo): show everything so the mock UI is fully browsable.
+  const permissions = [...ALL_CRM_PERMISSIONS];
+  return {
+    registered: true,
+    isMember: true,
+    roleSlugs: ["superadmin"],
+    permissions,
+    isSuperadmin: true,
+    loading: false,
+    can: () => true,
+  };
+}
+
+export const useMyAccess: () => MyAccess = isShellConfigured() ? useLiveAccess : useMockAccess;