fix(07-12): compareEquip 在克隆属性上按对象定位删除目标（Q4 仅修 (i)）

- 原属性索引为负或克隆槽位越界时不删除任何修饰器
- 删除目标改为克隆属性同槽位的自身对象，不再跨对象拼接索引
- 回归构造 rebuildModifiers 重建后的负索引路径，含触发机制断言

packages-user/data-base/src/hero/equipment.test.ts

@@ -7,11 +7,13 @@ import {
     ItemCategory,
     ItemStore,
     ReplayCode,
+    SaveCompression,
     TileStore,
     TileType
 } from '@user/data-common';
 import { logger } from '@motajs/common';
 import { HeroAttribute } from './attribute';
+import { ValueModifier } from './modifier';
 import { HeroEquipsStore } from './equipStore';
 import { HeroEquipment } from './equipment';
 import { EquipStatus } from './types';
@@ -429,6 +431,41 @@ describe('HeroEquipment compare and guards', () => {
         expect(diff.def).toBe(-3);
     });
 
+    // 验证装备实例经 rebuildModifiers 重建后原属性已不含其修饰器，克隆上不会误删同名旁的修饰器
+    it('keeps foreign modifiers when the equipped instance was rebuilt', () => {
+        const env = createEnv();
+        registerItem(env, createItem(10, 'sword', [0], [['atk', 5]]));
+        registerItem(env, createItem(11, 'axe', [0], [['atk', 12]]));
+        registerItem(env, createItem(12, 'bow', [0], [['def', 3]]));
+        env.equipment.setSlots(['weapon']);
+        const sword = env.store.add(10);
+        // 英雄侧同名修饰器优先级低于装备修饰器，重建后排在克隆属性数组末尾
+        env.attribute.addModifier('atk', new ValueModifier(7, -1));
+        env.equipment.equip(sword, 0);
+        expect(env.attribute.getFinalAttribute('atk')).toBe(22);
+
+        const axe = env.store.add(11);
+        const bow = env.store.add(12);
+        // 现役装备的修饰器仍在原属性上时可被定位删除，差值等于斧加成减现役剑加成
+        expect(env.equipment.compareEquip(axe, bow, 0).atk).toBe(7);
+
+        // 让现役装备走一次读档重建，其修饰器变为新对象，而原属性上仍是旧对象
+        env.store.loadState(
+            env.store.saveState(SaveCompression.NoCompression),
+            SaveCompression.NoCompression
+        );
+        const rebuilt = [...env.store.get(sword)!.getModifiers()][0][1];
+        // 触发机制：重建后的修饰器无法在原属性上解析，删除目标只能退化为按槽位取值，
+        // 旧实现把该索引直接用在克隆属性上，负索引会删掉克隆属性末尾的英雄侧修饰器
+        expect(env.attribute.getModifierIndex(rebuilt)).toBe(-1);
+
+        const diff = env.equipment.compareEquip(axe, bow, 0);
+
+        // 原属性不含现役装备的修饰器时克隆上不删除任何修饰器，故差值只体现斧与弓的加成
+        expect(diff.atk).toBe(12);
+        expect(diff.def).toBe(-3);
+    });
+
     // 验证装备实例缺失时卸下告警 146
     it('warns code 146 when the equipped instance is missing', () => {
         const env = createEnv();

packages-user/data-base/src/hero/equipment.ts

@@ -279,8 +279,13 @@ export class HeroEquipment<THero> implements IHeroEquipment<THero> {
                 return {} as Partial<THero>;
             }
             for (const [name, modifier] of state.getModifiers()) {
+                // 索引取自原属性，为负时说明原属性已不含该修饰器对象，克隆上不得删除任何修饰器
                 const index = this.attribute.getModifierIndex(modifier);
-                clone.deleteModifierByIndex(name, index);
+                if (index < 0) continue;
+                // 克隆体按原属性同顺序重建修饰器数组，故取克隆自己的同槽位新对象作为删除目标
+                const cloned = [...clone.getModifiers(name)][index];
+                if (!cloned) continue;
+                clone.deleteModifier(name, cloned);
             }
         }