Check Advanced victory after Mentat actions

docs/ADVANCED_PREVIEW.md

@@ -52,9 +52,10 @@ that prediction.
 
 The increase adds to the ordinary solo and alliance stronghold targets, while
 independent Ecaz joint-occupation and Homeworld special-victory conditions stay
-separate under the provisional interpretation. The original Mentat phase
-continues unless CHOAM's completed end-of-Mentat opportunity was the source,
-in which case the next turn begins. The final turn defaults to ten; an agreement
+separate under the provisional interpretation. Fresh Advanced phases check
+victory after players finish Mentat opportunities, so accepting continuation
+starts the next turn. Basic and older already-open non-CHOAM phases retain their
+opening-time check and resume Mentat. The final turn defaults to ten; an agreement
 at the current final turn provisionally extends it by one, including a turn-ten
 agreement. The Fremen and Guild final-victory checks move to the agreed final
 turn under this interpretation, even though the supplied Fremen sheet names the