refactor(wgsl): modularize common shader functions

Extracted common WGSL functions into separate files in `common/shaders/` to improve reusability and maintainability.

- Created `common/shaders/render/fullscreen_vs.wgsl` for a reusable fullscreen vertex shader.
- Created `common/shaders/math/color.wgsl` for color conversion and tone mapping functions.
- Created `common/shaders/math/utils.wgsl` for general math utilities.
- Created `common/shaders/render/raymarching.wgsl` for SDF raymarching logic.
- Updated multiple shaders to use these new common snippets via `#include`.
- Fixed the shader asset validation test to correctly handle shaders that include the common vertex shader.

This refactoring makes the shader code more modular and easier to manage.

1 files changed, 1 insertions, 8 deletions

diff --git a/workspaces/test/shaders/chroma_aberration.wgsl b/workspaces/test/shaders/chroma_aberration.wgsl
index 6c942b7..ee730b1 100644
--- a/workspaces/test/shaders/chroma_aberration.wgsl
+++ b/workspaces/test/shaders/chroma_aberration.wgsl
@@ -10,14 +10,7 @@ struct ChromaAberrationParams {
 @group(0) @binding(2) var<uniform> uniforms: CommonUniforms;
 @group(0) @binding(3) var<uniform> params: ChromaAberrationParams;
 
-@vertex fn vs_main(@builtin(vertex_index) i: u32) -> @builtin(position) vec4<f32> {
-    var pos = array<vec2<f32>, 3>(
-        vec2<f32>(-1, -1),
-        vec2<f32>(3, -1),
-        vec2<f32>(-1, 3)
-    );
-    return vec4<f32>(pos[i], 0.0, 1.0);
-}
+#include "render/fullscreen_vs"
 
 @fragment fn fs_main(@builtin(position) p: vec4<f32>) -> @location(0) vec4<f32> {
     let uv = p.xy / uniforms.resolution;