Support target-scoped trauma mechanics

src/lib/calculations/mechanic-recipes.test.ts

@@ -25,6 +25,7 @@ const paramsByAction: Record<TriggerActionKey, unknown> = {
 		]
 	},
 	headshot: {},
+	body_shot: {},
 	headshot_kill: {},
 	weapon_kill: {},
 	target_hit_within_distance: { meters: 15 },
@@ -96,6 +97,27 @@ describe('mechanic recipe registry', () => {
 		});
 	});
 
+	it('maps head and body shots to authoritative weapon-hit predicates', () => {
+		for (const [action, headshot] of [['headshot', true], ['body_shot', false]] as const) {
+			expect(seedFor(action).clauses[0]).toMatchObject({
+				when: 'weapon_hit',
+				if: {
+					kind: 'all',
+					predicates: [
+						{ kind: 'exists', value: { source: 'event', path: 'targetId' } },
+						{ kind: 'exists', value: { source: 'event', path: 'values.headshot' } },
+						{
+							kind: 'compare',
+							left: { source: 'event', path: 'values.headshot' },
+							operator: 'eq',
+							right: headshot
+						}
+					]
+				}
+			});
+		}
+	});
+
 	it('models firing triggers as explicit lifecycle branches', () => {
 		const continuous = seedFor('continuous_firing_duration');
 		expect(continuous.pools).toEqual([expect.objectContaining({ key: 'firing-active', max: 1 })]);