chore: improved for readability, in `widget.ts` and `patch.ts`

[wgxh-cli]

Add some comments to explain code writers' intentions, and removed some ternary operations for readability.

WARN

Too many ternary operations will break the readability, for reader's feeling, please put them in right place.

For example, when assigning for a variable when the value is optional or conditional, then ternary operations would adapt a lot. But, for example, in patch.ts, When doing some operations that causes side effect, you should use if else block instead.

That's my advice, take it easy!~

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