refactor: move common/shaders/ to src/shaders/

Relocates shared WGSL shaders under src/ where all source code lives,
eliminating the top-level common/ directory.

- Update asset references in workspaces/main/assets.txt and workspaces/test/assets.txt
- Update docs: PROJECT_CONTEXT.md, ARCHITECTURE.md, WORKSPACE_SYSTEM.md, SHADER_REUSE_INVESTIGATION.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 0 insertions, 52 deletions

diff --git a/common/shaders/camera_common.wgsl b/common/shaders/camera_common.wgsl
deleted file mode 100644
index 846d052..0000000
--- a/common/shaders/camera_common.wgsl
+++ /dev/null
@@ -1,52 +0,0 @@
-// Camera parameters and helpers for SDF raymarching effects
-
-struct CameraParams {
-    inv_view: mat4x4f,
-    fov: f32,
-    near_plane: f32,
-    far_plane: f32,
-    aspect_ratio: f32,
-}
-
-struct Ray {
-    origin: vec3f,
-    direction: vec3f,
-}
-
-// Generate camera ray for given UV coordinates (-1 to 1)
-fn getCameraRay(cam: CameraParams, uv: vec2f) -> Ray {
-    let cam_pos = vec3f(cam.inv_view[3].x, cam.inv_view[3].y, cam.inv_view[3].z);
-
-    // Compute ray direction from FOV and aspect ratio
-    let tan_fov = tan(cam.fov * 0.5);
-    let ndc = vec3f(uv.x * cam.aspect_ratio * tan_fov, uv.y * tan_fov, -1.0);
-
-    // Transform direction by inverse view matrix (rotation only)
-    let dir = normalize(
-        cam.inv_view[0].xyz * ndc.x +
-        cam.inv_view[1].xyz * ndc.y +
-        cam.inv_view[2].xyz * ndc.z
-    );
-
-    return Ray(cam_pos, dir);
-}
-
-// Extract camera position from inverse view matrix
-fn getCameraPosition(cam: CameraParams) -> vec3f {
-    return vec3f(cam.inv_view[3].x, cam.inv_view[3].y, cam.inv_view[3].z);
-}
-
-// Extract camera forward vector (view direction)
-fn getCameraForward(cam: CameraParams) -> vec3f {
-    return -normalize(vec3f(cam.inv_view[2].x, cam.inv_view[2].y, cam.inv_view[2].z));
-}
-
-// Extract camera up vector
-fn getCameraUp(cam: CameraParams) -> vec3f {
-    return normalize(vec3f(cam.inv_view[1].x, cam.inv_view[1].y, cam.inv_view[1].z));
-}
-
-// Extract camera right vector
-fn getCameraRight(cam: CameraParams) -> vec3f {
-    return normalize(vec3f(cam.inv_view[0].x, cam.inv_view[0].y, cam.inv_view[0].z));
-}