feat(rules): sunder deals real weapon damage vs object hardness/hp; broken weapons usable at -2 with restricted crits

SRD Sunder + CRB 'Smashing an Object' / 'Conditions - Broken': weapons
carry Table 7-12 object stats (AttackSpec.hardness/hit_points/enhancement,
defaults by weapon class); a successful sunder deals the attacker's actual
physical weapon damage minus the target weapon's hardness, subtracted from
its hp. At <= half hp the weapon gains the broken condition - still usable
at -2 attack/damage, crits only on a natural 20 at x2. At <= 0 it is
destroyed (weapon_destroyed, unusable). The old flat str_mod+2 / durability
10 / synthetic 'disarmed' condition is gone. Firearm misfire carve-out kept
(broken firearms stay unusable until Quick Clear - misfire escalation not
modeled, documented).

src/pf1e_simulator/models.py

@@ -232,6 +232,11 @@ class DamageComponent(_FrozenModel):
         return value
 
 
+_HAFTED_WEAPON_TOKENS: tuple[str, ...] = (
+    "axe", "spear", "hammer", "mace", "flail", "staff", "pick", "javelin",
+)
+
+
 class AttackSpec(_FrozenModel):
     """One attack menu entry (weapon or natural attack).
 
@@ -254,6 +259,13 @@ class AttackSpec(_FrozenModel):
     weapons. `secondary` marks a secondary natural attack (tail, wing, etc.):
     the engine applies -5 to the attack bonus (reduced to -2 with the
     Multiattack feat).
+
+    Object statistics (CRB "Breaking and Entering", Table 7-12): `hardness`
+    and `hit_points` are authorable overrides; when absent the engine
+    derives them from the weapon class via `object_stats()`. `enhancement`
+    is the weapon's enhancement bonus (0 = masterwork or plain); each +1
+    adds +2 hardness and +10 hit points (CRB "Magic Armor, Shields, and
+    Weapons").
     """
 
     id: str
@@ -272,6 +284,34 @@ class AttackSpec(_FrozenModel):
     two_handed: bool = False
     natural: bool = False
     secondary: bool = False
+    hardness: int | None = Field(default=None, ge=0)
+    hit_points: int | None = Field(default=None, ge=1)
+    enhancement: int = Field(default=0, ge=0, le=20)
+
+    def object_stats(self) -> tuple[int, int]:
+        """Hardness and hit points of the weapon as an OBJECT (Medium item).
+
+        Defaults from CRB Table 7-12 "Common Armor, Weapon, and Shield
+        Hardness and Hit Points" when not authored: projectile weapons 5/5;
+        hafted weapons (wooden haft: axe, spear, hammer, mace, flail,
+        staff, pick, javelin) hardness 5, 5 hp one-handed / 10 hp
+        two-handed; blades steel hardness 10, 5 hp one-handed / 10 hp
+        two-handed. The light/one-handed granularity is collapsed to
+        one-handed (the model has no weapon-weight field). Enhancement
+        adds +2 hardness and +10 hp per +1 (footnotes 1 and 3).
+        """
+        if self.kind == "ranged" or self.firearm:
+            base_hardness, base_hp = 5, 5
+        elif any(token in self.name.lower() for token in _HAFTED_WEAPON_TOKENS):
+            base_hardness, base_hp = 5, (10 if self.two_handed else 5)
+        else:
+            base_hardness, base_hp = 10, (10 if self.two_handed else 5)
+        hardness = self.hardness if self.hardness is not None else base_hardness
+        hit_points = self.hit_points if self.hit_points is not None else base_hp
+        return (
+            hardness + 2 * self.enhancement,
+            hit_points + 10 * self.enhancement,
+        )
 
 
 class DamageReduction(_FrozenModel):