test(tui): accept profile_home kwarg in _FakeWorker doubles

_SlashWorker call sites now pass profile_home=; the fakes' 2-arg
__init__ raised TypeError inside the spawn guard, leaving
slash_worker=None and failing the orphan-race regression tests.

tests/test_tui_gateway_server.py

@@ -1947,7 +1947,7 @@ def test_init_session_fires_reset_hook(monkeypatch):
     hooks = []
 
     class _FakeWorker:
-        def __init__(self, key, model):
+        def __init__(self, key, model, profile_home=None):
             self.key = key
 
         def close(self):
@@ -5453,7 +5453,7 @@ def test_session_create_close_race_does_not_orphan_worker(monkeypatch):
     unregistered_keys: list[str] = []
 
     class _FakeWorker:
-        def __init__(self, key, model):
+        def __init__(self, key, model, profile_home=None):
             self.key = key
             self._closed = False
 
@@ -5574,7 +5574,7 @@ def test_session_create_no_race_keeps_worker_alive(monkeypatch):
     unregistered_keys: list[str] = []
 
     class _FakeWorker:
-        def __init__(self, key, model):
+        def __init__(self, key, model, profile_home=None):
             self.key = key
 
         def close(self):
@@ -5678,7 +5678,7 @@ def test_get_db_degrades_cleanly_when_sessiondb_init_fails(monkeypatch):
 
 def test_session_create_continues_when_state_db_is_unavailable(monkeypatch):
     class _FakeWorker:
-        def __init__(self, key, model):
+        def __init__(self, key, model, profile_home=None):
             self.key = key
 
         def close(self):
@@ -5726,7 +5726,7 @@ def test_session_create_lazy_info_reports_desktop_contract(monkeypatch):
     date" on every launch even against a current backend."""
 
     class _FakeWorker:
-        def __init__(self, key, model):
+        def __init__(self, key, model, profile_home=None):
             self.key = key
 
         def close(self):