feat(hooks): add get_indicator_state and verify thinking/live markers

tests/test_api_hook_extensions.py

@@ -26,6 +26,13 @@ def test_select_list_item_integration(live_gui):
     response = client.select_list_item("disc_listbox", "Default")
     assert response == {'status': 'queued'}
 
+def test_get_indicator_state_integration(live_gui):
+    client = ApiHookClient()
+    # thinking_indicator is usually hidden unless AI is running
+    response = client.get_indicator_state("thinking_indicator")
+    assert 'shown' in response
+    assert response['tag'] == "thinking_indicator"
+
 def test_app_processes_new_actions():
     import gui
     from unittest.mock import MagicMock, patch