fix: inherit parent override in reflect template

[etienne-scaleway]

Problem

When calling reflect() on a lens that is itself the result of a previous reflect(), fields accessed through the getter's dictionary proxy resolved to plain paths instead of going through the parent's override mapping.

For example:

const reflect1 = lens.reflect(({ foo }) => ({ bar: foo }));
// reflect1.focus('bar').interop().name === 'foo' ✓

const reflect2 = reflect1.reflect(({ bar }) => ({ baz: bar }));
// reflect2.focus('baz').interop().name === 'bar' ✗ (expected 'foo')

The second reflect lost reflect1's mapping (bar → foo) and resolved bar as a literal path.

Root cause

In LensCore#reflect, a fresh template lens is created to back the dictionary proxy. However, this template did not inherit the parent lens's override, so when the getter called template.focus('bar'), the focus method took the plain-lens branch (LensCore.ts:95) — which just appends bar to template.path — instead of resolving through the parent's override mapping.

Failing test

tests/object-reflect.test.ts > reflect can be called on the result of a previous reflect

The first assertion passed (reflect1.focus('bar').interop().name was 'foo'), the second failed (reflect2.focus('baz').interop().name was 'bar' instead of 'foo').

Fix

Inherit the parent's override on the template before invoking the getter (src/LensCore.ts:114):

if (this.override) {
  template.override = this.override;
}

This way template.focus('bar') resolves through reflect1's override to path='foo'. After the getter returns, the template's override is replaced with the new mapping (template.override = override), so the inherited override is only used during getter execution and doesn't leak into the returned lens. The if guard avoids a type error under exactOptionalPropertyTypes: true.

All 55 unit tests pass with no type errors.

[github-actions]

🎉 This PR is included in version 0.10.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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[aspirisen]

Thank you for the contribution ❤️