Three real fixes for the sim test + the live_gui coordination layer:
1. /api/project_switch_status endpoint in src/app_controller.py.
The wait helper had been calling this endpoint but it did not exist;
the helper always received a 404, fell back to {in_progress: False},
and returned immediately even when a switch was in flight. Added the
endpoint that reads _project_switch_in_progress, active_project_path,
and _project_switch_error from the controller.
2. simulation/sim_base.py: replace time.sleep(2.0)/time.sleep(1.5) in
the setup() with wait_io_pool_idle and wait_for_project_switch so
the test does not click btn_md_only while a project switch is in
flight. Also added the wait calls to sim_context.py for the same
reason.
3. src/app_controller.py _handle_md_only: removed the is_project_stale()
early-return. The stale state is a transient window during which the
previous code dropped the click on the floor with a misleading
'stale ui' status. The MD generation worker is safe to run from any
project state; the action handler now always proceeds.
4. tests/test_extended_sims.py: set current_model to 'gemini-cli' so
_do_generate does not raise KeyError('model') when the test
overrides provider to gemini_cli.
KNOWN ISSUE: test_context_sim_live still fails with status
'switching to: temp_livecontextsim' after a 60s wait. The click
appears to be re-triggering a project switch via the GUI's render
loop. Root cause investigation deferred; the sim is async and the
test path is fragile.
ed