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, 67 deletions

diff --git a/common/shaders/render/scene_query_bvh.wgsl b/common/shaders/render/scene_query_bvh.wgsl
deleted file mode 100644
index cf2136b..0000000
--- a/common/shaders/render/scene_query_bvh.wgsl
+++ /dev/null
@@ -1,67 +0,0 @@
-#include "math/sdf_shapes"
-#include "math/sdf_utils"
-
-struct BVHNode {
-    min: vec3f,
-    left_idx: i32,
-    max: vec3f,
-    obj_idx_or_right: i32,
-};
-
-@group(0) @binding(2) var<storage, read> bvh_nodes: array<BVHNode>;
-
-fn get_dist(p: vec3f, obj_params: vec4f) -> f32 {
-    let obj_type = obj_params.x;
-    if (obj_type == 1.0) { return length(p) - 1.0; } // Unit Sphere
-    if (obj_type == 2.0) { return sdBox(p, vec3f(1.0)); } // Unit Box
-    if (obj_type == 3.0) { return sdTorus(p, vec2f(1.0, 0.4)); } // Unit Torus
-    if (obj_type == 4.0) { return sdPlane(p, vec3f(0.0, 1.0, 0.0), 0.0); }
-    if (obj_type == 5.0) { return sdBox(p, obj_params.yzw); } // MESH AABB
-    return 100.0;
-}
-
-fn map_scene(p: vec3f, skip_idx: u32) -> f32 {
-    var d = 1000.0;
-    var stack: array<i32, 32>;
-    var stack_ptr = 0;
-    
-    if (arrayLength(&bvh_nodes) > 0u) {
-        stack[stack_ptr] = 0;
-        stack_ptr++;
-    }
-
-    while (stack_ptr > 0) {
-        stack_ptr--;
-        let node_idx = stack[stack_ptr];
-        let node = bvh_nodes[node_idx];
-
-        if (aabb_sdf(p, node.min, node.max) < d) {
-            if (node.left_idx < 0) { // Leaf
-                let obj_idx = u32(node.obj_idx_or_right);
-                if (obj_idx == skip_idx) { continue; }
-                let obj = object_data.objects[obj_idx];
-                let q = (obj.inv_model * vec4f(p, 1.0)).xyz;
-
-                // Extract scale factors from the model matrix
-                let sx = length(obj.model[0].xyz);
-                let sy = length(obj.model[1].xyz);
-                let sz = length(obj.model[2].xyz);
-                
-                var s = min(sx, min(sy, sz));
-                if (obj.params.x == 4.0) {
-                    s = sy; // Plane normal is (0,1,0) in local space
-                }
-                
-                d = min(d, get_dist(q, obj.params) * s);
-            } else { // Internal
-                if (stack_ptr < 31) {
-                    stack[stack_ptr] = node.left_idx;
-                    stack_ptr++;
-                    stack[stack_ptr] = node.obj_idx_or_right;
-                    stack_ptr++;
-                }
-            }
-        }
-    }
-    return d;
-}