fix(app_controller): clear project-switch state in _handle_reset_session

When a prior test in the tier-3-live_gui batch leaves a _do_project_switch
background thread running, the next test's btn_project_new_automated click
sees _project_switch_in_progress=True (from the prior thread) and queues
the new path via _project_switch_pending_path. The queued switch is never
actually submitted to the io_pool, so is_project_stale() stays True and
AI ops (_handle_generate_send) bail with 'project switch in progress;
AI ops disabled'.

Fix: _handle_reset_session now also clears _project_switch_in_progress,
_project_switch_pending_path, and _project_switch_error (under the
existing _project_switch_lock). This way, even if the prior background
thread is still running, the controller reports an idle state and the
new switch can be submitted normally.

Also:
- src/api_hook_client.py: reverted wait_for_project_switch to require
  in_progress=False (was relaxed to return on queued path, which misled
  the caller into thinking the switch was done)
- tests/test_handle_reset_session_clears_project.py: new test
  test_handle_reset_session_clears_project_switch_state asserts
  is_project_stale() returns False after reset
- tests/test_api_hook_client_wait_for_project_switch.py: updated
  test_wait_for_project_switch_does_not_return_on_queued (in_progress
  + matching path should keep waiting, not return early)
- tests/test_live_workflow.py: added pre-wait for any in-flight switch
  before doing btn_reset (so the test waits up to 60s for the prior
  switch to complete if needed)
- conductor/todos/TODO_test_full_live_workflow.md: updated Task 4 with
  the deeper hang analysis and recommended fix

Known follow-up: test_full_live_workflow still hangs in tier-3 batch
even with this fix, because the new _do_project_switch itself is hung
in the io_pool (likely saturation from prior sims' AI discussion turn
workers). Deeper investigation required.

tests/test_live_workflow.py

@@ -40,7 +40,23 @@ def test_full_live_workflow(live_gui) -> None:
  client = ApiHookClient()
  assert client.wait_for_server(timeout=10)
  client.post_session(session_entries=[])
- 
+
+ # 0. Wait for any in-flight project switch to complete before starting.
+ # The session-scoped live_gui fixture shares the controller across all
+ # 48 live tests. Prior tests (especially test_extended_sims) may leave
+ # a project switch hanging in the io_pool. If we proceed without waiting,
+ # our new switch will be queued behind the hung one and is_project_stale()
+ # will return True, blocking AI ops.
+ pre_status = client.get_project_switch_status()
+ if pre_status.get("in_progress"):
+  print(f"\n[TEST] Waiting for prior project switch to complete: {pre_status}")
+  idle_status = client.wait_for_project_switch(timeout=60.0)
+  assert not idle_status.get("timeout"), (
+   f"Prior project switch did not complete in 60s. Aborting. "
+   f"Last status: {idle_status}"
+  )
+  print(f"[TEST] Prior switch done: {idle_status}")
+
  # 1. Reset
  print("\n[TEST] Clicking Reset...")
  client.click("btn_reset")