…22402)

Stacked on #22400. Closes the second `cjs-module-lexer` gap.

After #22400, `Object.defineProperty(exports, "name", ...)` is fine, but `exports["name"] = …` / `module.exports["name"] = …` were still being emitted with backtick keys in minify. The lexer recognises this form too — it just couldn't see them past the template literal.

Valid-identifier keys (`exports["foo"]`) are already collapsed to dot access by the minifier earlier in the pipeline, so only non-identifier keys (`exports["has-dash"]`, `module.exports["__esModule"]`, …) survive to the codegen stage and were affected.

In `AssignmentExpression::gen_expr`, detect when the LHS is a computed member expression on `exports` / `module.exports` whose key is a `StringLiteral`, and print the key via `print_string_literal(key, false)`. Other computed access (`otherObj["x"]`) is unaffected.

### Where each cjs-module-lexer named-export form lands

| Pattern | Status |
|---|---|
| `exports.name = …` | identifier — never affected |
| `module.exports.name = …` | identifier — never affected |
| `module.exports = { "name": … }` | object property keys already use `allow_backtick: false` |
| `Object.defineProperty(exports, "name", …)` | fixed in #22400 |
| `exports["name"] = …` / `module.exports["name"] = …` | **fixed here** |

### Before / after

```js
// input
exports["has-dash"] = a;
module.exports["__esModule"] = true;
otherObj["not-exports"] = d;
```

```js
// before
exports[`has-dash`]=a,module.exports[`__esModule`]=!0,otherObj[`not-exports`]=d;

// after
exports["has-dash"]=a,module.exports.__esModule=!0,otherObj[`not-exports`]=d;
```

(`module.exports.__esModule` collapses to dot via a separate minifier pass; `otherObj["x"]` correctly stays backtick.)

Refs #22342

AI assisted.

### 🚀 Features

- bc91a17 codegen: Expose `Codegen::with_source_type` method (#22432)
(camc314)

### 🐛 Bug Fixes

- 5ac7e79 minifier: Drop unused-var-init pure IIFEs and preserve
annotation for downstream (#22349) (Dunqing)
- 4ab57eb allocator: Fixed-size allocators use `VirtualAlloc` on Windows
(#22124) (overlookmotel)
- 66d77eb allocator: Fix segfault on Linux MUSL with fixed-size
allocators (#22388) (overlookmotel)
- b8fbc1f transformer/object-rest-spread: Correct scope id when moving
bindings (#22419) (camc314)
- 18edc2c codegen: Keep `Object.defineProperty` property name as plain
string in minify (#22400) (Dunqing)
- dda33de transformer/explicit-resource-management: Align lexical
binding scopes (#22320) (camc314)
- 8e79de8 transformer: Preserve for-await statement bodies (#22361)
(camc314)
- 0cba210 transformer/class: Replace `new.target` in static blocks
(#22360) (camc314)
- 67ab1c9 transformer/es2018/for-await: Hoist for-await generated
bindings (#22355) (camc314)
- c3ceb4a transformer/object-rest-spread: Use hoisted scope for `for-of`
temp refs (#22347) (camc314)

### ⚡ Performance

- 73a9043 allocator/bitset: Avoid temp heap `String` allocation (#22403)
(camc314)
- 8b2f4f9 transformer/object-rest-spread: Collect `Vec<SymbolId` over
`Vec<BindingIdentifier>` (#22418) (camc314)
- 83679ea parser: Split TriviaBuilder::handle_token hot/cold paths
(#22415) (Boshen)
- 2c7d781 codegen: Inline identifier-name accessors (#22411) (Boshen)
- 618bc76 diagnostics: Inline `OxcDiagnosticInner` to avoid heap
allocation (#22406) (Boshen)
- 0b4e158 parser: Reserve cap `2` for sequence expressions vec (#22374)
(camc314)
- 5f3bdd0 codegen: Add `#[inline]` to `code`, `code_len` (#22373)
(camc314)

Co-authored-by: overlookmotel <557937+overlookmotel@users.noreply.github.com>