Align conftest mock herdr and unit test assertions with Claude's simplified session-based isolation and native herdr command updates

tests/test_tier1_unit.py

@@ -108,13 +108,13 @@ def test_resume_resolve_herdr_workspace_default(mam_sandbox):
     """Test resolve_herdr_workspace fallback behavior when session is not in YAML."""
     res = run_lib_func(mam_sandbox, "resolve_herdr_workspace", "non-existent-session")
     assert res.returncode == 0
-    assert res.stdout.strip() == "w1"
+    assert res.stdout.strip() == "default"
 
 def test_resume_resolve_herdr_workspace_env(mam_sandbox):
     """Test resolve_herdr_workspace fallback to HERDR_SERVER_NAME env var."""
     res = run_lib_func(mam_sandbox, "resolve_herdr_workspace", "non-existent-session", env={"HERDR_SERVER_NAME": "custom_server"})
     assert res.returncode == 0
-    assert res.stdout.strip() == "w1" # default mapping to w1 unless resolved from workspace list
+    assert res.stdout.strip() == "custom_server"
 
 def test_resume_find_workspace_uuid_empty(mam_sandbox):
     """Test find_workspace_uuid returns empty string for non-existent workspace."""