mechanic: start acts as their loading task does

Upstream calls CompleteAct() when it dequeues the plot task, so the act
number, the plot bar and the act rewards change as "Loading Act N"
begins. pqcli did all that when the task ended. The random sequence is
the same either way, so the parity traces are unchanged; only the 1-2
seconds of the loading task differ.

pqcli/mechanic.py

@@ -618,12 +618,17 @@ class Simulation:
                     )
                     break
 
-            elif isinstance(self.player.task, PlotTask):
-                self.complete_act()
-
             old = self.player.task
             if self.player.queue:
-                self.player.set_task(self.player.queue.pop(0))
+                task = self.player.queue.pop(0)
+                if isinstance(task, PlotTask):
+                    # the act starts as its loading task does, as upstream
+                    self.complete_act()
+                    task = PlotTask(
+                        f"Loading {act_name(self.player.quest_book.act)}",
+                        task.duration,
+                    )
+                self.player.set_task(task)
             elif self.player.inventory.encum_bar.done:
                 self.player.set_task(
                     HeadingToMarketTask("Heading to market to sell loot", 4000)