Texture: WebGL1-era POT checks skip NPOT mipmap uploads and under-report gpuSize

[willeastcott]

Two leftovers from the WebGL1 no-mipmaps-on-NPOT restriction, which does not apply to WebGL2:

src/platform/graphics/webgl/webgl-texture.js:481:

if (!texture._needsUpload && ((texture._needsMipmapsUpload && texture._mipmapsUploaded) || !texture.pot)) {
    return;
}

The || !texture.pot clause early-returns mipmap-only upload requests for any NPOT texture, even though NPOT mipmaps are legal in WebGL2.

src/platform/graphics/texture.js:962:

const mips = this.pot && this._mipmaps && !(this._compressed && this._levels.length === 1);

gpuSize under-reports VRAM for every NPOT mipmapped texture.

🤖 Found during a code audit with Claude Code