test(ai_client): rename send_result to send in 22 remaining test files

Batch rename of 22 test files. 62 references renamed total.

The full test suite is now GREEN again, matching the pre-rename baseline
from Task 1.1. Pure mechanical rename. No behavior change.

Files affected: test_ai_cache_tracking, test_ai_client_cli,
test_ai_client_result, test_api_events, test_context_pruner,
test_deepseek_provider, test_gemini_cli_* (3 files), test_gui2_mcp,
test_headless_* (2 files), test_live_gui_integration_v2,
test_orchestration_logic, test_phase6_engine, test_rag_integration,
test_run_worker_lifecycle_abort, test_spawn_interception_v2,
test_symbol_parsing, test_tier4_interceptor, test_tiered_aggregation,
test_token_usage.

Note: spec estimated 24 files; actual is 22 (test_deprecation_warnings
no longer exists, and 1 fewer file than spec's list).

Refs: conductor/tracks/send_result_to_send_20260616/

tests/test_symbol_parsing.py

@@ -43,7 +43,7 @@ def test_handle_request_event_appends_definitions(controller):
  with (
   patch('src.app_controller.parse_symbols', return_value=["Track"]) as mock_parse,
    patch('src.app_controller.get_symbol_definition', return_value=("src/models.py", "class Track: pass", 42)) as mock_get_def,
-  patch('src.ai_client.send_result', return_value=Result(data="mocked response")) as mock_send_result
+  patch('src.ai_client.send', return_value=Result(data="mocked response")) as mock_send
  ):
   # Execute
   controller._handle_request_event(event)
@@ -54,8 +54,8 @@ def test_handle_request_event_appends_definitions(controller):
 
   # Check if enriched prompt was sent to AI
   expected_suffix = "\n\n[Definition: Track from src/models.py (line 42)]\n```python\nclass Track: pass\n```"
-  mock_send_result.assert_called_once()
-  args, kwargs = mock_send_result.call_args
+  mock_send.assert_called_once()
+  args, kwargs = mock_send.call_args
   sent_prompt = args[1]
   assert sent_prompt == "Explain @Track object" + expected_suffix
 
@@ -72,13 +72,13 @@ def test_handle_request_event_no_symbols(controller):
 
  with (
   patch('src.app_controller.parse_symbols', return_value=[]) as mock_parse,
-  patch('src.ai_client.send_result', return_value=Result(data="mocked response")) as mock_send_result
+  patch('src.ai_client.send', return_value=Result(data="mocked response")) as mock_send
  ):
   # Execute
   controller._handle_request_event(event)
 
   # Verify
-  mock_send_result.assert_called_once()
-  args, kwargs = mock_send_result.call_args
+  mock_send.assert_called_once()
+  args, kwargs = mock_send.call_args
   sent_prompt = args[1]
   assert sent_prompt == "Just a normal prompt"