fix: TeamManager admin rules, close role self-escalation, escalate-only resync (#27)

TeamManager could not manage the roster: updateRule allowed self-update
only and deleteRule was superuser-only. The same self-update rule also
left a privilege escalation open — it did not restrict fields, so any
authenticated user could PATCH their own role to "admin".

- team_members rules (migration 1781000003 + base migration + setup
  script mirror):
    update: (@request.auth.id = id && @request.body.role:isset = false)
            || @request.auth.role = "admin"
    delete: @request.auth.role = "admin"
  Self-service onboarding keeps working (it never touches role); the
  role field is admin-only; deletion is admin-only.
- pb_hooks/team_members.pb.js: the ENTRA_ADMIN_EMAILS resync is now
  escalate-only — it guarantees admin for allow-list members on every
  login but no longer demotes, otherwise every TeamManager promotion
  would revert on the member's next sign-in (ADR-004 amended).
- TeamManager.jsx: info text updated to the new behaviour.

Verified with a two-identity mock-OIDC matrix (11/11): allow-list vs
regular login, self-escalation blocked while onboarding self-update
still works, cross-user update/delete blocked, admin promote/demote/
delete work, promotion survives the member's next login, allow-list
admin stays admin. Regression: #22 matrix 9/9, #24 matrix 8/8, #18
harness 15/15, npm test 112/112, eslint clean.

Closes #27

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/auth-spec.md

@@ -39,13 +39,14 @@ Browser (SPA)                PocketBase (auth)                 Entra ID
 | 001 | OIDC-provider tegen Entra v2-endpoints i.p.v. eigen MSAL-flow of header-trust | Sluit aan op "PocketBase = enige backend"; secret server-side; auto-provisioning gratis; werkt los van de perimeter-implementatie |
 | 002 | `team_members` hergebruikt als auth-collection (zelfde naam) | Alle `user_id`-referenties blijven werken; minimale blast-radius |
 | 003 | Provisioning + admin-rol via `pb_hooks/team_members.pb.js` | Rol-logica server-side, niet in de client |
-| 004 | Admin-rol via e-mail-allowlist (`ENTRA_ADMIN_EMAILS`), re-synced elke login | Geen handmatig beheer; allowlist-wijziging werkt bij volgende login |
+| 004 | Admin-rol via e-mail-allowlist (`ENTRA_ADMIN_EMAILS`), **escalate-only** bij elke login (aangepast in #27) | Allow-list garandeert admin (promotie werkt bij volgende login) maar demoteert niet meer — anders zou elke TeamManager-promotie bij de volgende login worden teruggedraaid. Demotie via TeamManager; allow-list-leden demoteer je door ze van de lijst te halen |
 | 005 | API-rules → `@request.auth.id != ""` op alle app-collecties | Geen anonieme toegang meer; admins/users zijn beide geauthenticeerd |
 | 006 | Baseline-ledger-sync migratie voor out-of-band geprovisionede DB's | Labs/prod draaide historisch zonder `--migrationsDir`; replay van de historie crashte PB (issue #18). De vroegst-sorterende migratie markeert de historie als applied wanneer schema bestaat maar de ledger leeg is |
 | 007 | Migratie = structuur, hook = configuratie | De OIDC-provider wordt bij elke start (en per cron-minuut) gereconcilieerd vanuit `ENTRA_*` env door `pb_hooks/entra_oidc.pb.js`; een one-shot migratie die van deploy-time env afhangt kan OAuth2 anders permanent uitschakelen |
 | 008 | Hook-helpers via `require(`${__hooks}/utils.js`)` | De JSVM draait elke hook-callback als geïsoleerd programma; top-level functies zijn níet in scope op call-time |
 | 009 | `createRule: '@request.context = "oauth2"'` op `team_members` | PocketBase past de createRule toe op de OAuth2-sign-up (eerste login maakt het record aan); `null` blokkeerde élke eerste login met 403 (issue #22). De context-rule staat alléén de OAuth2-flow toe — anonieme REST-creates blijven geweigerd |
 | 010 | Claims uit het Entra **id_token** (`userInfoURL: ""`) + UPN-fallback voor e-mail | Graph `/oidc/userinfo` geeft géén `email`-claim voor accounts zonder mail-attribuut → 400 bij eerste login (issue #24). Het id_token bevat altijd `preferred_username` (UPN = primair e-mailadres bij Respellion); `entra_oidc.pb.js` gebruikt die als fallback (regex-guard tegen guest-UPN's) en logt gefaalde OAuth2-pogingen naar de containerlog |
+| 011 | `updateRule: '(@request.auth.id = id && @request.body.role:isset = false) \|\| @request.auth.role = "admin"'`, `deleteRule: '@request.auth.role = "admin"'` | TeamManager-rosterbeheer werkt nu voor app-admins (issue #27). De `role:isset`-guard sluit tegelijk de privilege-escalatie waarbij een gebruiker zijn eigen `role` naar admin kon patchen; onboarding raakt `role` niet en blijft self-service |
 
 ## Bestanden
 
@@ -55,6 +56,7 @@ Browser (SPA)                PocketBase (auth)                 Entra ID
 | `pb_migrations/1781000000_team_members_to_auth.js` | Converteert relation-velden naar text (data blijft behouden), dropt de oude PIN-collection en maakt `team_members` als auth-collection. Idempotent; provider wordt alleen als fast-path meegenomen als de env al aanwezig is. |
 | `pb_migrations/1781000001_tighten_api_rules.js` | Zet alle niet-systeem-collecties op `@request.auth.id != ""`. |
 | `pb_migrations/1781000002_allow_oauth2_signup.js` | Zet `createRule = '@request.context = "oauth2"'` op reeds-gemigreerde omgevingen (issue #22). |
+| `pb_migrations/1781000003_team_members_admin_rules.js` | Admin-rosterbeheer + role-escalatie-guard op reeds-gemigreerde omgevingen (issue #27). |
 | `pb_hooks/entra_oidc.pb.js` | Reconcilieert de OIDC-provider vanuit `ENTRA_*` env bij elke start + cron-tick (compare-before-save). |
 | `pb_hooks/utils.js` | Gedeelde helpers (`resolveRole`, `reconcileEntraOidc`) — per callback binnenhalen via `require()`. |
 | `pb_hooks/team_members.pb.js` | Auto-provisioning (`role`, `enrollment_status`, naam-fallback) + admin-rol re-sync. |

pb_hooks/team_members.pb.js

@@ -41,14 +41,17 @@ onRecordCreate(function (e) {
   e.next();
 }, "team_members");
 
-// On every successful auth (incl. OIDC): keep the admin role in sync with the
-// allow-list, so promoting/demoting an admin only requires an env change.
+// On every successful auth (incl. OIDC): guarantee the admin role for
+// allow-list members. ESCALATE-ONLY (#27): the allow-list grants admin, it no
+// longer demotes — otherwise every role promotion made through TeamManager
+// would be reverted on the member's next login. Demotion runs through
+// TeamManager; allow-list members cannot be demoted (the list wins on their
+// next login).
 onRecordAuthRequest(function (e) {
   const { resolveRole } = require(`${__hooks}/utils.js`);
   const email = e.record.get("email") || "";
-  const want = resolveRole(email);
-  if (e.record.get("role") !== want) {
-    e.record.set("role", want);
+  if (resolveRole(email) === "admin" && e.record.get("role") !== "admin") {
+    e.record.set("role", "admin");
     e.app.save(e.record);
   }
   e.next();

pb_migrations/1781000000_team_members_to_auth.js

@@ -151,8 +151,10 @@ migrate((app) => {
     listRule:   '@request.auth.id != ""',
     viewRule:   '@request.auth.id != ""',
     createRule: '@request.context = "oauth2"',
-    updateRule: '@request.auth.id = id',
-    deleteRule: null,
+    // Self-update may not touch `role` (closes self-service privilege
+    // escalation); admins manage the roster incl. roles and deletion (#27).
+    updateRule: '(@request.auth.id = id && @request.body.role:isset = false) || @request.auth.role = "admin"',
+    deleteRule: '@request.auth.role = "admin"',
     authRule:   "",
     manageRule: null,
 

pb_migrations/1781000003_team_members_admin_rules.js

@@ -0,0 +1,52 @@
+/// <reference path="../pb_data/types.d.ts" />
+//
+// Issue #27 — TeamManager roster management + close role self-escalation.
+//
+// The collection shipped with `updateRule: '@request.auth.id = id'` and
+// `deleteRule: null`. That broke the TeamManager admin panel (admins could
+// not change roles or remove members) AND left a privilege escalation open:
+// the self-update rule did not restrict fields, so any authenticated user
+// could PATCH their own `role` to "admin".
+//
+// New rules:
+//   update — a user may update their own record but NOT the `role` field
+//            (onboarding only touches enrollment fields); admins may update
+//            anyone, including `role`.
+//   delete — admins only.
+//
+// Environments that have not applied 1781000000 yet get these rules directly
+// from that (updated) migration; this follow-up exists for databases where it
+// already ran (Labs). Applying both is harmless (same values).
+const UPDATE_RULE = '(@request.auth.id = id && @request.body.role:isset = false) || @request.auth.role = "admin"';
+const DELETE_RULE = '@request.auth.role = "admin"';
+
+migrate((app) => {
+  let col;
+  try {
+    col = app.findCollectionByNameOrId("team_members");
+  } catch (_) {
+    console.log("team_members_admin_rules: team_members does not exist — skipping.");
+    return;
+  }
+  if (col.type !== "auth") {
+    console.log("team_members_admin_rules: team_members is not an auth collection — skipping.");
+    return;
+  }
+  col.updateRule = UPDATE_RULE;
+  col.deleteRule = DELETE_RULE;
+  app.save(col);
+}, (app) => {
+  // Down: restore the previous (self-update only, superuser delete) rules.
+  let col;
+  try {
+    col = app.findCollectionByNameOrId("team_members");
+  } catch (_) {
+    return;
+  }
+  if (col.type !== "auth") {
+    return;
+  }
+  col.updateRule = '@request.auth.id = id';
+  col.deleteRule = null;
+  app.save(col);
+});

scripts/setup-pb-collections.mjs

@@ -114,6 +114,10 @@ const COLLECTIONS = [
     // Mirror of pb_migrations/1781000002: creation only via the OAuth2
     // sign-up flow (issue #22).
     createRule: '@request.context = "oauth2"',
+    // Mirror of pb_migrations/1781000003: self-update without role changes;
+    // roster management (incl. role/delete) is admin-only (issue #27).
+    updateRule: '(@request.auth.id = id && @request.body.role:isset = false) || @request.auth.role = "admin"',
+    deleteRule: '@request.auth.role = "admin"',
     passwordAuth: { enabled: false, identityFields: ['email'] },
     fields: [
       { name: 'name', type: 'text', required: false },

src/components/admin/TeamManager.jsx

@@ -8,10 +8,11 @@ import { useApp } from '../../store/AppContext';
 
 // Users are provisioned automatically on first Azure (Entra ID) login — admins
 // no longer create them by hand. This panel lets an admin review the roster,
-// switch a member between user/admin, and remove members. The admin role is
-// also re-synced from the ENTRA_ADMIN_EMAILS allow-list on every login (see
-// pb_hooks/team_members.pb.js), so a manual change here can be overridden on
-// the member's next sign-in if their e-mail is on/off that list.
+// switch a member between user/admin, and remove members. The
+// ENTRA_ADMIN_EMAILS allow-list is escalate-only (see
+// pb_hooks/team_members.pb.js): it guarantees admin for its members on every
+// login, so promotions made here stick, but demoting an allow-list member is
+// undone on their next sign-in — remove them from the list instead.
 const TeamManager = () => {
   const { state } = useApp();
   const [users, setUsers] = useState([]);
@@ -67,8 +68,9 @@ const TeamManager = () => {
         <p className="text-sm text-fg-muted flex items-start gap-2">
           <Info size={16} className="mt-0.5 shrink-0 text-teal" />
           Team members are created automatically when they first sign in with their
-          Microsoft account. Admins are granted via the <code>ENTRA_ADMIN_EMAILS</code>{' '}
-          allow-list and re-synced on each login.
+          Microsoft account. Members of the <code>ENTRA_ADMIN_EMAILS</code> allow-list
+          are always admin; promotions made here stick, but demoting an allow-list
+          member is undone on their next sign-in.
         </p>
       </Card>