fix(rules): restrict nauseated creatures to a single move action

PF1e (SRD Conditions, nauseated): "The only action such a character can take is a single move actions per turn." _NAUSEA_MOVE_KINDS now holds only genuine move actions (move, stand_up, retrieve_weapon, repair_weapon): the 5-foot step and dropping prone are free actions and are dropped by the nauseated filter. The pinned filter test was retargeted; README updated.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

README.md

@@ -931,7 +931,12 @@ Règles modélisées :
 - Conditions effectives : 28 conditions prédéfinies (`conditions.py`). Leurs drapeaux
   comportementaux sont appliqués par le moteur : `cant_act` (étourdi, paralysé, dazed,
   endormi, inerme, fasciné) annule le tour ; `cant_attack` (nauséeux) n'autorise qu'une unique action
-  de mouvement (`move`, `5foot_step`, `stand_up`, `drop_prone`) et bloque toute
+   de mouvement — conformance L9 (SRD « Conditions — Nauseated ») : « The only
+   action such a character can take is a single move actions per turn » — seuls
+   les vraies actions de mouvement (`move`, `stand_up`, `retrieve_weapon`,
+   `repair_weapon`) survivent au filtre ; le pas de placement (`5foot_step`) et
+   se jeter à terre (`drop_prone`) sont des actions **libres**, non de
+   mouvement, et sont donc retirés ; le nauséeux bloque toute
   attaque, manœuvre **et incantation** (CRB : un nauséeux ne peut ni attaquer,
    ni incanter, ni se concentrer) ; `staggered` restreint à une action
    simple (une action de mouvement OU standard, pas d'attaque à outrance ni

src/pf1e_simulator/combat.py

@@ -6388,10 +6388,12 @@ def _choose_spell_action(
 
 
 _SWIFT_BONUS_KINDS: frozenset[str] = frozenset({"deed", "inspire_courage", "swift"})
-# PF1e (CRB): a nauseated creature can take only a single move action per
-# turn — no standard, no full-round, no attacks, no spellcasting.
+# PF1e (SRD Conditions, nauseated): "The only action such a character can
+# take is a single move action per turn" — genuine move actions only: the
+# 5-foot step and dropping prone are free actions, not move actions, and
+# run/charge/withdraw are full-round.
 _NAUSEA_MOVE_KINDS: frozenset[str] = frozenset(
-    {"move", "5foot_step", "stand_up", "drop_prone"}
+    {"move", "stand_up", "retrieve_weapon", "repair_weapon"}
 )
 
 # Casting-time plumbing for the budget filters: a cast_spell action consumes

tests/test_conformance_p1.py

@@ -409,11 +409,17 @@ def test_nauseated_cannot_cast_via_action_execution() -> None:
 
 
 def test_nauseated_filter_keeps_move_kinds_drops_everything_else() -> None:
-    for kind in ("move", "5foot_step", "stand_up", "drop_prone"):
+    # SRD nauseated: "The only action such a character can take is a single
+    # move action per turn" — only genuine move actions survive; the 5-foot
+    # step and dropping prone are free actions, not move actions.
+    for kind in ("move", "stand_up", "retrieve_weapon", "repair_weapon"):
         kept = _nauseated_filter((Action(kind=kind, target_id="foe"),))
         assert len(kept) == 1, kind
         assert kept[0].kind == kind, kind
-    for kind in ("attack", "cast_spell", "full_attack", "charge", "maneuver", "hex"):
+    for kind in (
+        "attack", "cast_spell", "full_attack", "charge", "maneuver", "hex",
+        "5foot_step", "drop_prone",
+    ):
         assert _nauseated_filter((Action(kind=kind, target_id="foe"),)) == (), kind