Refactor: Reorganize workspaces and remove assets/ directory

Workspace structure now:
- workspaces/{main,test}/obj/      (3D models)
- workspaces/{main,test}/shaders/  (WGSL shaders)
- workspaces/{main,test}/music/    (audio samples)

Changes:
- Moved workspaces/*/assets/music/ → workspaces/*/music/
- Updated assets.txt paths (assets/music/ → music/)
- Moved test_demo.{seq,track} to tools/
- Moved assets/originals/ → tools/originals/
- Removed assets/common/ (legacy, duplicated in workspaces)
- Removed assets/final/ (legacy, superseded by workspaces)
- Updated hot-reload paths in main.cc
- Updated CMake references for test_demo and validation
- Updated gen_spectrograms.sh paths

handoff(Claude): Workspace reorganization complete

1 files changed, 0 insertions, 56 deletions

diff --git a/assets/common/shaders/render/scene_query_linear.wgsl b/assets/common/shaders/render/scene_query_linear.wgsl
deleted file mode 100644
index 0497a40..0000000
--- a/assets/common/shaders/render/scene_query_linear.wgsl
+++ /dev/null
@@ -1,56 +0,0 @@
-#include "math/sdf_shapes"
-#include "math/sdf_utils"
-
-fn get_dist(p: vec3<f32>, obj_params: vec4<f32>) -> 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, vec3<f32>(1.0)); } // Unit Box
-    if (obj_type == 3.0) { return sdTorus(p, vec2<f32>(1.0, 0.4)); } // Unit Torus
-    if (obj_type == 4.0) { return sdPlane(p, vec3<f32>(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: vec3<f32>, skip_idx: u32) -> f32 {
-
-    var d = 1000.0;
-
-    let num_objects = arrayLength(&object_data.objects);
-
-    for (var i = 0u; i < num_objects; i++) {
-
-        if (i == skip_idx) { continue; }
-
-        let obj = object_data.objects[i];
-
-        let q = (obj.inv_model * vec4<f32>(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);
-
-    }
-
-    return d;
-
-}