fix(companion): preserve models with auth disabled (#5797)

* fix(companion): preserve models with auth disabled

* test(companion): guard auth-disabled model scoping

companion/routes.py

@@ -23,7 +23,7 @@ from fastapi import APIRouter, HTTPException, Request
 from fastapi.responses import HTMLResponse
 
 from core.middleware import require_admin
-from src.auth_helpers import get_current_user
+from src.auth_helpers import _auth_disabled, get_current_user
 
 from companion import pairing as _pairing
 
@@ -113,8 +113,9 @@ def setup_companion_routes() -> APIRouter:
         The stock /api/models route scopes to get_current_user, which for a
         bearer token is the sandboxed pseudo-user "api" (owns nothing). Here we
         scope to the token's real owner instead, plus legacy null-owner shared
-        rows -- the same rule as owner_filter. Read-only; never returns api_key
-        material.
+        rows -- the same rule as owner_filter. Explicit auth-disabled mode keeps
+        the stock route's single-user all-endpoints view. Read-only; never
+        returns api_key material.
         """
         require_models_scope(request)
         import json as _json
@@ -123,6 +124,11 @@ def setup_companion_routes() -> APIRouter:
         from src.endpoint_resolver import build_chat_url
 
         owner = token_owner(request)
+        single_user_mode = (
+            owner is None
+            and not getattr(request.state, "api_token", False)
+            and _auth_disabled()
+        )
         out = []
         db = SessionLocal()
         try:
@@ -133,7 +139,7 @@ def setup_companion_routes() -> APIRouter:
             if owner:
                 q = q.filter((ModelEndpoint.owner == owner) | (ModelEndpoint.owner == None))  # noqa: E711
             for ep in q.all():
-                if not owner_can_see(ep.owner, owner):
+                if not single_user_mode and not owner_can_see(ep.owner, owner):
                     continue
                 try:
                     model_ids = _json.loads(ep.cached_models) if ep.cached_models else []

tests/test_companion_readonly.py

@@ -257,6 +257,7 @@ def test_models_route_rejects_api_token_without_chat_scope(monkeypatch):
 
 
 def test_models_route_unresolved_owner_returns_only_shared_rows(monkeypatch):
+    monkeypatch.setenv("AUTH_ENABLED", "true")
     rows = [
         _ep(1, "alice-endpoint", "alice"),
         _ep(2, "shared-endpoint", None),
@@ -278,6 +279,87 @@ def test_models_route_unresolved_owner_returns_only_shared_rows(monkeypatch):
     assert _endpoint_names(endpoints) == ["shared-endpoint"]
 
 
+def test_models_route_auth_disabled_does_not_widen_ownerless_api_token(monkeypatch):
+    monkeypatch.setenv("AUTH_ENABLED", "false")
+    rows = [
+        _ep(1, "alice-endpoint", "alice"),
+        _ep(2, "shared-endpoint", None),
+        _ep(3, "bob-endpoint", "bob"),
+    ]
+    monkeypatch.setattr(companion_routes, "get_current_user", lambda request: None)
+
+    endpoints = _call_models_route(
+        monkeypatch,
+        rows,
+        _request(
+            api_token=True,
+            api_token_owner=None,
+            api_token_scopes=["chat"],
+            current_user="api",
+        ),
+    )
+
+    assert _endpoint_names(endpoints) == ["shared-endpoint"]
+
+
+def test_models_route_auth_disabled_keeps_cookie_owner_scoped(monkeypatch):
+    monkeypatch.setenv("AUTH_ENABLED", "false")
+    rows = [
+        _ep(1, "alice-endpoint", "alice"),
+        _ep(2, "shared-endpoint", None),
+        _ep(3, "bob-endpoint", "bob"),
+    ]
+    monkeypatch.setattr(companion_routes, "get_current_user", lambda request: "alice")
+
+    endpoints = _call_models_route(
+        monkeypatch,
+        rows,
+        _request(api_token=False, current_user="alice"),
+    )
+
+    assert _endpoint_names(endpoints) == ["alice-endpoint", "shared-endpoint"]
+
+
+def test_models_route_auth_enabled_anonymous_returns_only_shared_rows(monkeypatch):
+    monkeypatch.setenv("AUTH_ENABLED", "true")
+    rows = [
+        _ep(1, "alice-endpoint", "alice"),
+        _ep(2, "shared-endpoint", None),
+        _ep(3, "bob-endpoint", "bob"),
+    ]
+    monkeypatch.setattr(companion_routes, "get_current_user", lambda request: None)
+
+    endpoints = _call_models_route(
+        monkeypatch,
+        rows,
+        _request(api_token=False, current_user=None),
+    )
+
+    assert _endpoint_names(endpoints) == ["shared-endpoint"]
+
+
+def test_models_route_auth_disabled_returns_all_enabled_rows(monkeypatch):
+    monkeypatch.setenv("AUTH_ENABLED", "false")
+    rows = [
+        _ep(1, "alice-endpoint", "alice"),
+        _ep(2, "shared-endpoint", None),
+        _ep(3, "bob-endpoint", "bob"),
+    ]
+    monkeypatch.setattr(companion_routes, "get_current_user", lambda request: None)
+
+    endpoints = _call_models_route(
+        monkeypatch,
+        rows,
+        _request(api_token=False, current_user=None),
+    )
+
+    assert _endpoint_names(endpoints) == [
+        "alice-endpoint",
+        "shared-endpoint",
+        "bob-endpoint",
+    ]
+
+
 def test_models_route_filters_hidden_models_and_secret_fields(monkeypatch):
     rows = [
         _ep(