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- Removed assets/final/ (legacy, superseded by workspaces)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, 25 deletions

diff --git a/assets/final/shaders/main_shader.wgsl b/assets/final/shaders/main_shader.wgsl
deleted file mode 100644
index ab0278c..0000000
--- a/assets/final/shaders/main_shader.wgsl
+++ /dev/null
@@ -1,25 +0,0 @@
-#include "common_uniforms"
-
-@group(0) @binding(0) var<uniform> uniforms: CommonUniforms;
-
-@vertex fn vs_main(@builtin(vertex_index) i: u32) -> @builtin(position) vec4<f32> {
-    let PI = 3.14159265;
-    let num_sides = 7.0;
-    let scale = 0.5 + 0.3 * uniforms.audio_intensity;
-    let tri_idx = f32(i / 3u);
-    let sub_idx = i % 3u;
-    if (sub_idx == 0u) {
-        return vec4<f32>(0.0, 0.0, 0.0, 1.0);
-    }
-    let angle = (tri_idx + f32(sub_idx - 1u)) * 2.0 * PI / num_sides + uniforms.time * 0.5;
-    return vec4<f32>(scale * cos(angle) / uniforms.aspect_ratio, scale * sin(angle), 0.0, 1.0);
-}
-
-@fragment fn fs_main() -> @location(0) vec4<f32> {
-    let h = uniforms.time * 2.0 + uniforms.audio_intensity * 3.0;
-    let r = sin(h) * 0.5 + 0.5;
-    let g = sin(h + 2.0) * 0.9 + 0.3;
-    let b = sin(h + 4.0) * 0.5 + 0.5;
-    let boost = uniforms.audio_intensity * 0.5;
-    return vec4<f32>(r + boost, g + boost, b + boost, 1.0);
-}