fix(auth): revoke API tokens when deleting users

* fix: revoke API bearer tokens when their owner is deleted

* Re-run CI

* Invalidate bearer-token cache on user delete so warmed cached tokens stop working

tests/test_delete_user_invalidates_token_cache.py

@@ -0,0 +1,58 @@
+"""Deleting a user must invalidate the bearer-token cache.
+
+delete_user removes the user's ApiToken rows from the DB, but the bearer-auth
+middleware in app.py serves from an in-memory prefix->token cache that only
+rebuilds when flagged dirty (app.state.invalidate_token_cache). If the admin
+delete route does not flag it, a deleted user's already-cached token keeps
+authenticating until some unrelated token op or a process restart clears the
+cache. The DELETE /api/auth/users handler now calls the invalidator on a
+successful delete (and only then), so the next bearer request rebuilds the
+cache from the DB, where the rows are already gone, and the token is rejected.
+"""
+import asyncio
+import types
+
+from routes.auth_routes import setup_auth_routes, DeleteUserRequest
+
+
+def _handler(router):
+    for route in router.routes:
+        if getattr(route, "path", "") == "/api/auth/users" and "DELETE" in getattr(route, "methods", set()):
+            return route.endpoint
+    raise AssertionError("DELETE /api/auth/users handler not found")
+
+
+def _fake_request(invalidations):
+    state = types.SimpleNamespace(invalidate_token_cache=lambda: invalidations.append(True))
+    app = types.SimpleNamespace(state=state)
+    return types.SimpleNamespace(cookies={"_dummy": "x"}, app=app)
+
+
+def _auth_manager(delete_result):
+    return types.SimpleNamespace(
+        get_username_for_token=lambda token: "admin",
+        is_admin=lambda user: True,
+        delete_user=lambda username, requesting_user: delete_result,
+    )
+
+
+def test_successful_delete_invalidates_cache():
+    invalidations = []
+    router = setup_auth_routes(_auth_manager(delete_result=True))
+    handler = _handler(router)
+    result = asyncio.run(handler(DeleteUserRequest(username="bob"), _fake_request(invalidations)))
+    assert result == {"ok": True}
+    assert invalidations == [True], "successful delete must flag the token cache stale"
+
+
+def test_refused_delete_does_not_invalidate_cache():
+    invalidations = []
+    router = setup_auth_routes(_auth_manager(delete_result=False))
+    handler = _handler(router)
+    try:
+        asyncio.run(handler(DeleteUserRequest(username="admin"), _fake_request(invalidations)))
+        raised = False
+    except Exception:
+        raised = True
+    assert raised, "a refused delete should raise (HTTP 400)"
+    assert invalidations == [], "a refused delete must not touch the token cache"

tests/test_delete_user_revokes_api_tokens.py

@@ -0,0 +1,116 @@
+"""Deleting a user must also revoke their API bearer tokens.
+
+Regression test: delete_user purged cookie sessions but left ApiToken
+rows behind, so a deleted user could keep authenticating with an
+"ody_..." bearer token forever.
+"""
+
+import contextlib
+import importlib
+import sys
+import types
+from pathlib import Path
+
+import pytest
+
+
+def _real_core_package():
+    root = Path(__file__).resolve().parent.parent
+    core_path = str(root / "core")
+    core = sys.modules.get("core")
+    if core is None:
+        core = types.ModuleType("core")
+        sys.modules["core"] = core
+    core.__path__ = [core_path]
+    if hasattr(core, "auth"):
+        delattr(core, "auth")
+    sys.modules.pop("core.auth", None)
+    return core
+
+
+def _auth_module():
+    _real_core_package()
+    return importlib.import_module("core.auth")
+
+
+class _OwnerColumn:
+    """Mimics a SQLAlchemy column: ApiToken.owner == x yields a marker."""
+
+    def __eq__(self, other):
+        return ("owner ==", other)
+
+    def __hash__(self):
+        return id(self)
+
+
+class _FakeApiToken:
+    owner = _OwnerColumn()
+
+
+class _FakeQuery:
+    def __init__(self, recorder):
+        self._recorder = recorder
+        self._conds = []
+
+    def filter(self, *conds):
+        self._conds.extend(conds)
+        return self
+
+    def delete(self, *args, **kwargs):
+        self._recorder.append(list(self._conds))
+        return len(self._conds)
+
+
+class _FakeSession:
+    def __init__(self, recorder):
+        self._recorder = recorder
+
+    def query(self, model):
+        assert model is _FakeApiToken
+        return _FakeQuery(self._recorder)
+
+
+@pytest.fixture
+def manager(tmp_path, monkeypatch):
+    auth_mod = _auth_module()
+    monkeypatch.setattr(auth_mod, "_hash_password", lambda password: f"hash:{password}")
+    monkeypatch.setattr(
+        auth_mod, "_verify_password", lambda password, hashed: hashed == f"hash:{password}"
+    )
+    mgr = auth_mod.AuthManager(str(tmp_path / "auth.json"))
+    assert mgr.create_user("admin", "secret-admin-pw", is_admin=True)
+    assert mgr.create_user("bob", "secret-bob-pw", is_admin=False)
+    return mgr
+
+
+@pytest.fixture
+def db_calls(monkeypatch):
+    calls = []
+
+    @contextlib.contextmanager
+    def _fake_db_session():
+        yield _FakeSession(calls)
+
+    db_stub = types.ModuleType("core.database")
+    db_stub.get_db_session = _fake_db_session
+    db_stub.ApiToken = _FakeApiToken
+    monkeypatch.setitem(sys.modules, "core.database", db_stub)
+    return calls
+
+
+def test_delete_user_revokes_api_tokens(manager, db_calls):
+    assert manager.delete_user("bob", "admin") is True
+    assert "bob" not in manager.users
+    assert db_calls, "delete_user never purged ApiToken rows for the deleted user"
+    assert [("owner ==", "bob")] in db_calls
+
+
+def test_refused_delete_leaves_tokens_alone(manager, db_calls):
+    assert manager.delete_user("admin", "bob") is False
+    assert "admin" in manager.users
+    assert db_calls == []
+
+
+def test_unknown_user_leaves_tokens_alone(manager, db_calls):
+    assert manager.delete_user("ghost", "admin") is False
+    assert db_calls == []