test(gui): Fix test_discussion_tabs_rendered mock assertion

The test was incorrectly asserting against mock_imgui.begin_tab_item instead of the newly refactored mock_imscope.tab_item context manager pattern.

src/ai_client.py

@@ -151,26 +151,6 @@ def set_current_tier(tier: Optional[str]) -> None:
  """
  _local_storage.current_tier = tier
 
-def get_comms_log_callback() -> Optional[Callable[[dict[str, Any]], None]]:
- """
- 
-  Returns the comms log callback (thread-local with global fallback).
-  [C: src/multi_agent_conductor.py:run_worker_lifecycle]
- """
- tl_cb = getattr(_local_storage, "comms_log_callback", None)
- if tl_cb: return tl_cb
- return comms_log_callback
-
-def set_comms_log_callback(cb: Optional[Callable[[dict[str, Any]], None]]) -> None:
- """
- 
-  Sets the comms log callback (both global and thread-local).
-  [C: src/app_controller.py:AppController._init_ai_and_hooks, src/multi_agent_conductor.py:run_worker_lifecycle]
- """
- global comms_log_callback
- comms_log_callback = cb
- _local_storage.comms_log_callback = cb
-
 # Increased to allow thorough code exploration before forcing a summary
 MAX_TOOL_ROUNDS: int = 10
 
@@ -270,6 +250,26 @@ COMMS_CLAMP_CHARS: int = 300
 
 #region: Comms Log
 
+def get_comms_log_callback() -> Optional[Callable[[dict[str, Any]], None]]:
+ """
+ 
+  Returns the comms log callback (thread-local with global fallback).
+  [C: src/multi_agent_conductor.py:run_worker_lifecycle]
+ """
+ tl_cb = getattr(_local_storage, "comms_log_callback", None)
+ if tl_cb: return tl_cb
+ return comms_log_callback
+
+def set_comms_log_callback(cb: Optional[Callable[[dict[str, Any]], None]]) -> None:
+ """
+ 
+  Sets the comms log callback (both global and thread-local).
+  [C: src/app_controller.py:AppController._init_ai_and_hooks, src/multi_agent_conductor.py:run_worker_lifecycle]
+ """
+ global comms_log_callback
+ comms_log_callback = cb
+ _local_storage.comms_log_callback = cb
+
 def _append_comms(direction: str, kind: str, payload: dict[str, Any]) -> None:
  """
   [C: tests/test_ai_client_concurrency.py:run_t1, tests/test_ai_client_concurrency.py:run_t2, tests/test_mma_agent_focus_phase1.py:test_append_comms_has_source_tier_key, tests/test_mma_agent_focus_phase1.py:test_append_comms_source_tier_none_when_unset, tests/test_mma_agent_focus_phase1.py:test_append_comms_source_tier_set_when_current_tier_set, tests/test_mma_agent_focus_phase1.py:test_append_comms_source_tier_tier2]