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- Removed assets/final/ (legacy, superseded by workspaces)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, 120 deletions

diff --git a/assets/demo.seq b/assets/demo.seq
deleted file mode 100644
index a8717f3..0000000
--- a/assets/demo.seq
+++ /dev/null
@@ -1,120 +0,0 @@
-# ============================================================================
-# DEMO SEQUENCE DEFINITION
-# ============================================================================
-# Defines the timeline and layering of visual effects for the demo.
-# Compiled by seq_compiler into src/generated/timeline.cc at build time.
-#
-# DOCUMENTATION: See doc/SEQUENCE.md for complete syntax reference
-#
-# QUICK REFERENCE:
-#   SEQUENCE <start> <priority> ["optional_name"] [optional_end]
-#     EFFECT <+|=|-> <ClassName> <start> <end>
-#
-#   Priority modifiers: + (increment), = (same), - (decrement/background)
-#   Time notation: 0b (beats), 0.0 (seconds)
-#   Optional name: Displayed in Gantt charts (e.g., "Opening Scene")
-#
-# VALIDATION & VISUALIZATION:
-#   ./build/seq_compiler assets/demo.seq                    # Validate only
-#   ./build/seq_compiler assets/demo.seq --gantt-html=t.html  # HTML Gantt
-#
-# ============================================================================
-
-# BPM 120
-
-SEQUENCE 0b 0
-  EFFECT - FlashCubeEffect .2 3       # Background cube (priority -1 = behind everything)
-  EFFECT + FlashEffect 0.0 1. color=1.0,0.5,0.5 decay=0.95  # Red-tinted flash
-  EFFECT + FadeEffect 0.1 1.          # Priority 1
-  EFFECT + SolarizeEffect 0 4b        # Priority 2 (was 3, now contiguous)
-  EFFECT + VignetteEffect 0 6 radius=0.6 softness=0.1
-
-SEQUENCE 2.0 0
-  EFFECT + CircleMaskEffect 0.0 4.0 0.50        # Priority 0 mask generator
-  EFFECT + RotatingCubeEffect 0.0 4.0           # Priority 1 (renders inside circle)
-  EFFECT + GaussianBlurEffect 1.0 2.0 strength=1.0
-  EFFECT + GaussianBlurEffect 3.0 4.0 strength=2.0
-
-SEQUENCE 4b 0
-  EFFECT - FlashCubeEffect 0.1 3.     # Priority -1
-  EFFECT + FlashEffect 0.0 0.2        # Priority 0 (was 4, now contiguous)
-
-SEQUENCE 6b 1
-  EFFECT + ParticleSprayEffect 0 4    # Priority 0 (spray particles)
-  EFFECT + ParticlesEffect 0 4        # Priority 1
-  EFFECT = GaussianBlurEffect 0 8 strength=3.0     # Priority 1 (stronger blur)
-
-SEQUENCE 7b 0
-  EFFECT + HeptagonEffect 0.0 .2      # Priority 0
-  EFFECT + FadeEffect 0.1 1.0         # Priority 1 (was 5, now contiguous)
-
-# Post-processing chain (priority 10 = applied after scene rendering)
-# Effects are applied in priority order: lower numbers first
-SEQUENCE 8b 3
-  EFFECT + ThemeModulationEffect 0 4     # Priority 0
-  EFFECT = HeptagonEffect 0.0 4.0        # Priority 0 (same layer)
-  EFFECT + GaussianBlurEffect 0 8 strength=1.5        # Priority 1 (subtle blur)
-  EFFECT + ChromaAberrationEffect 0 6 offset=0.03 angle=0.785    # Priority 2 (diagonal, stronger)
-  EFFECT + SolarizeEffect 0 10           # Priority 3
-
-SEQUENCE 12b 2
-  EFFECT - FlashCubeEffect .2 3          # Priority -1 (background)
-  EFFECT + HeptagonEffect 0 4            # Priority 0
-  EFFECT + ParticleSprayEffect 0 4       # Priority 1 (spray particles)
-  EFFECT + ParticlesEffect 0 4           # Priority 2
-
-SEQUENCE 15b 2
-  EFFECT - FlashCubeEffect .2 3          # Priority -1 (background)
-  EFFECT + FlashEffect 0.0 1             # Priority 0
-
-SEQUENCE 16b 10
-  EFFECT - FlashCubeEffect .2 3          # Priority -1 (background)
-  EFFECT + GaussianBlurEffect 0 8        # Priority 0
-  EFFECT + FlashEffect 0.0 0.2           # Priority 1
-  EFFECT = FlashEffect 1b 0.2            # Priority 1 (same layer)
-
-SEQUENCE 17b 2
-  EFFECT + ThemeModulationEffect 0 4     # Priority 0
-  EFFECT + HeptagonEffect 0.2 2.0        # Priority 1
-  EFFECT + ParticleSprayEffect 0 4       # Priority 2 (spray particles)
-  EFFECT = ParticlesEffect 0 4           # Priority 2 (same layer)
-  EFFECT + Hybrid3DEffect 0 4            # Priority 3
-  EFFECT + GaussianBlurEffect 0 8        # Priority 4
-  EFFECT + ChromaAberrationEffect 0 6 offset=0.01 angle=1.57    # Priority 5 (vertical, subtle)
-
-SEQUENCE 24b 1
-  EFFECT + ThemeModulationEffect 0 8     # Priority 0
-  EFFECT + HeptagonEffect 0.2 2.0        # Priority 1
-  EFFECT + ParticleSprayEffect 0 8       # Priority 2 (spray particles - longer duration)
-  EFFECT + Hybrid3DEffect 0 20           # Priority 3
-  EFFECT + GaussianBlurEffect 0 8        # Priority 4
-  EFFECT + ChromaAberrationEffect 0 10   # Priority 5
-  EFFECT + SolarizeEffect 0 10           # Priority 6
-
-SEQUENCE 32b 0
-  EFFECT + ThemeModulationEffect 0 4     # Priority 0
-  EFFECT + HeptagonEffect 0 16           # Priority 1
-  EFFECT + ChromaAberrationEffect 0 16   # Priority 2
-  EFFECT + GaussianBlurEffect 0 8        # Priority 3
-
-SEQUENCE 48b 0
-  EFFECT + ThemeModulationEffect 0 4     # Priority 0
-  EFFECT + HeptagonEffect 0.2 2.0        # Priority 1
-  EFFECT + GaussianBlurEffect 0 8        # Priority 2
-  EFFECT + SolarizeEffect 0 2            # Priority 3
-
-SEQUENCE 56b 0
-  EFFECT + ThemeModulationEffect 0 8     # Priority 0
-  EFFECT = HeptagonEffect 0.2 2.0        # Priority 0 (same layer)
-  EFFECT + Hybrid3DEffect 0 4            # Priority 1
-  EFFECT + ParticleSprayEffect 0 8       # Priority 2 (spray particles)
-  EFFECT + HeptagonEffect 0 16           # Priority 3
-  EFFECT + ChromaAberrationEffect 0 16   # Priority 4
-  EFFECT + GaussianBlurEffect 0 8        # Priority 5
-
-SEQUENCE 62b 0
-  EFFECT + ThemeModulationEffect 0 3     # Priority 0
-  EFFECT + VignetteEffect 0 3 radius=0.6 softness=0.3 # New effect
-  EFFECT + SolarizeEffect 0 3            # Priority 2
-# Demo automatically exits at this time (supports beat notation)
-END_DEMO 65b