Renderer: fix types and references

[s-rigaud]

Description

While trying different TS configs to improve the project I found the following errors.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	339.52 79.1	339.52 79.1	+0 B +0 B
WebGPU	490.81 136.38	490.85 136.4	+42 B +13 B
WebGPU Nodes	490.27 136.28	490.32 136.29	+42 B +13 B

🌳 Bundle size after tree-shaking

Minimal build including a renderer, camera, empty scene, and dependencies.

	Before	After	Diff
WebGL	465.41 112.15	465.41 112.15	+0 B +0 B
WebGPU	561.38 152.09	561.43 152.1	+42 B +8 B
WebGPU Nodes	516.77 141.66	516.81 141.67	+42 B +8 B