fix(mma): Unblock visual simulation - event routing, loop passing, adapter preservation

Three independent root causes fixed:
- gui_2.py: Route mma_spawn_approval/mma_step_approval events in _process_event_queue
- multi_agent_conductor.py: Pass asyncio loop from ConductorEngine.run() through to
  thread-pool workers for thread-safe event queue access; add _queue_put helper
- ai_client.py: Preserve GeminiCliAdapter in reset_session() instead of nulling it

Test: visual_sim_mma_v2::test_mma_complete_lifecycle passes in ~8s

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/settings.local.json

@@ -15,7 +15,9 @@
       "mcp__manual-slop__set_file_slice",
       "mcp__manual-slop__py_set_signature",
       "mcp__manual-slop__py_set_var_declaration",
-      "mcp__manual-slop__py_check_syntax"
+      "mcp__manual-slop__py_check_syntax",
+      "Bash(timeout 120 uv run:*)",
+      "Bash(uv run:*)"
     ]
   },
   "enableAllProjectMcpServers": true,