Pass additional uniforms to shaders

The following are passed to shaderotoy shaders, and might be a good place to start:

```
uniform vec3 iResolution;
uniform float iTime;
uniform float iTimeDelta;
uniform float iFrame;
uniform vec4 iMouse;
uniform vec4 iDate;
```

Start by locating the shader setup and the path that binds uniforms, then compare it with the listed Shadertoy uniforms: iResolution, iTime, iTimeDelta, iFrame, iMouse, and iDate. Done means these additional uniforms are passed to shaders consistently; the issue names no files or tests, so the relevant validation must be found in the project.

Written by the indexing model from the issue text.