Potentially-`undefined` value not flagged when destructuring union of empty tuple and array

还没有人认领这个 Issue。

### 🔎 Search Terms

"tuple destructuring", "tuple narrowing"

### 🕗 Version & Regression Information

This bug appears to occur as far back as TS 3.3 up to the current nightly build, as tested in the Playground.

### ⏯ Playground Link

https://www.typescriptlang.org/play/?ts=5.8.2#code/C4TwDgpgBAggTnKBeWCCGIA8A7ArgWwCMI4A+KAHygG0BdSmgZ2DgEtsBzWgbgCheAJhADGAGzRxowgPbZmUCXABcqOH14y5wGmnopFfNADpg0gMot2HABQBKblAD0jqAFEAHpGHAIAlSThpOCNYb1w0URVsaSgAoJDAGXJ+TXlCZAUEagAGHl5CE3NLTjsHZzdPER8-WIR40OBwyJrA4KhAUHJ+XigoIA

### 💻 Code

```ts
type Arr = Array | [] | [string];

declare const arr: Arr;

const [a] = arr;
a.toString(); // Expected: error. Actual: no error. ❌

const b = arr[0];
b.toString(); // Expected: error. Actual: error. ✅
```

`.d.ts` from Playground:
```ts
type Arr = Array | [] | [string];
declare const arr: Arr;
declare const a: string | number | undefined;
declare const b: string | number | undefined;
```

### 🙁 Actual behavior

When destructuring a value whose type is an array, an empty tuple, and a non-empty tuple, the destructured value isn't flagged as possibly `undefined` which caused a runtime error. The value is correctly flagged as possibly `undefined` when accessing it by index.

### 🙂 Expected behavior

When destructuring a value whose type is an array, an empty tuple, and a non-empty tuple, the destructured value should be flagged as potentially being `undefined`.

### Additional information about the issue

This seems related to #55661 except, in this case, the union contains a mix of tuples and an array.

从链接的 TypeScript Playground 复现开始，并将元组解构推断出的类型与索引访问结果进行比较。查看相关 issue #55661 以了解背景。在这个数组与元组的混合 union 情况下，解构出的值被报告为可能是 undefined，同时不改变正确的索引访问行为，即表示完成。

由索引模型根据 Issue 内容生成。