Translate Code Between Languages Like a Native Speaker

Translate this [SOURCE LANGUAGE] code to
[TARGET LANGUAGE].

```
[PASTE YOUR CODE]
```

But don't just convert syntax. I need:

1. IDIOMATIC REWRITE — write it how a senior
   [TARGET] developer would from scratch.
   Use the language's native patterns,
   standard library, and conventions.

2. CRITICAL DIFFERENCES — what behaves
   differently between these languages?
   (types, null handling, async, errors,
   mutability, scope, iteration)

3. GOTCHA WARNINGS — what will silently
   break or behave unexpectedly after
   translation? (floating point, string
   encoding, date handling, etc.)

4. DEPENDENCY MAP — what libraries in
   [TARGET] replace the ones used in
   [SOURCE]? Show exact install commands.

5. TEST PARITY — write one test that
   proves the translation is correct.