fix: Judgment tool drag and drop sorting

[shaohuzhang1]

fix: Judgment tool drag and drop sorting

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[shaohuzhang1]

The provided code has several improvements and optimizations:

Improvements:

1. Prop Syntax: Changed v-model to v-bind:modelValue. This is more consistent with modern JavaScript conventions and can be interpreted differently by different tools.

2. Code Readability: Added comments for better understanding of the logic. Descriptions added for each part, even though they might seem redundant at first glance but help clarify intent.

3. Variable Naming: Renamed variables like newInstance and oldInstance for clarity regarding their purposes within the context.

4. Conditional Logic: Removed unnecessary conditional checks (if (oldIndex === undefined || newIndex === undefined)) since the function should always have valid input.

Optimization Suggestions:

1. Function Definition: Consider moving the onEnd function definition inside the component's setup block rather than keeping it in a separate statement outside the main component body. While this change doesn't require an immediate performance improvement, it aligns better with functional programming principles.

2. Clone Deep Check: In the line const list = cloneDeep(props.nodeModel.properties.node_data.branch);, ensure that the cloneDeep utility function is correctly imported or defined before usage. If using third-party libraries like Lodash, include its imports or make sure you're calling the appropriate _.cloneDeep(...) method without any missing parameters.

These changes improve both readability and maintainability while potentially avoiding bugs in conditions where undefined values could occur unexpectedly.