fix(frontend): 修复前端审计问题并补充回归测试

frontend/src/utils/stableObjectKey.ts

@@ -0,0 +1,19 @@
+let globalStableObjectKeySeed = 0
+
+/**
+ * 为对象实例生成稳定 key（基于 WeakMap，不污染业务对象）
+ */
+export function createStableObjectKeyResolver<T extends object>(prefix = 'item') {
+  const keyMap = new WeakMap<T, string>()
+
+  return (item: T): string => {
+    const cached = keyMap.get(item)
+    if (cached) {
+      return cached
+    }
+
+    const key = `${prefix}-${++globalStableObjectKeySeed}`
+    keyMap.set(item, key)
+    return key
+  }
+}