fix: 移除无效的对象大小检查并添加堆空间溢出异常

移除 `isValidObject` 计算属性中无效的对象大小检查，并在创建对象时添加堆空间溢出异常处理，以防止对象大小超过堆空间时程序继续执行。

Author: nce40202

src/views/MemoryVisualizer.vue

@@ -434,10 +434,8 @@ const convertToBytes = (size: number, unit: string) => {
 const hasApplicationError = ref(false);
 
 const isValidObject = computed(() => {
-    const sizeInBytes = convertToBytes(newObject.value.size, newObject.value.unit);
     return newObject.value.name &&
         newObject.value.size > 0 &&
-        sizeInBytes <= (heapSize.value - usedHeapSize.value) &&
         !hasApplicationError.value;
 });
 
@@ -626,6 +624,11 @@ const createObject = () => {
         isGarbageCollectable: newObject.value.isGarbageCollectable
     } as HeapObject;
 
+    // 对象大小超过堆空间大小，直接抛出异常
+    if (sizeInBytes > heapSize.value) {
+        throw applicationError('java.lang.OutOfMemoryError: Java heap space');
+    }
+
     if (sizeInBytes >= memoryConfig.value.pretenureSizeThreshold && memoryConfig.value.pretenureSizeThreshold > 0) {
         // 对象大小超过阈值，直接进入Old Gen区
         if (getSpaceUsed(MEMORY_SPACE.OLD_GEN) + newObj.size > oldGenSize.value) {