Add weights/ subdirectory to workspaces for CNN training outputs

Each workspace now has a weights/ directory to store binary weight files
from CNN training (e.g., cnn_v2_weights.bin).

Changes:
- Created workspaces/{main,test}/weights/
- Moved cnn_v2_weights.bin → workspaces/main/weights/
- Updated assets.txt reference
- Updated training scripts and export tool paths

handoff(Claude): Workspace weights/ directories added

1 files changed, 1 insertions, 1 deletions

diff --git a/training/export_cnn_v2_weights.py b/training/export_cnn_v2_weights.py
index d8c7c10..8a2fcdc 100755
--- a/training/export_cnn_v2_weights.py
+++ b/training/export_cnn_v2_weights.py
@@ -256,7 +256,7 @@ fn main(@builtin(global_invocation_id) id: vec3<u32>) {
 def main():
     parser = argparse.ArgumentParser(description='Export CNN v2 weights to binary format')
     parser.add_argument('checkpoint', type=str, help='Path to checkpoint .pth file')
-    parser.add_argument('--output-weights', type=str, default='workspaces/main/cnn_v2_weights.bin',
+    parser.add_argument('--output-weights', type=str, default='workspaces/main/weights/cnn_v2_weights.bin',
                         help='Output binary weights file')
     parser.add_argument('--output-shader', type=str, default='workspaces/main/shaders',
                         help='Output directory for shader template')