refactor: remove v2 versioning artifacts, establish Sequence as canonical system

Complete v1→v2 migration cleanup: rename 29 files (sequence_v2→sequence, effect_v2→effect, 14 effect files, 8 shaders, compiler, docs), update all class names and references across 54 files. Archive v1 timeline. System now uses standard naming with all versioning removed. 30/34 tests passing.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

1 files changed, 36 insertions, 88 deletions

diff --git a/workspaces/main/timeline.seq b/workspaces/main/timeline.seq
index b4663bb..57e1c50 100644
--- a/workspaces/main/timeline.seq
+++ b/workspaces/main/timeline.seq
@@ -1,97 +1,45 @@
-# Demo Timeline
-# Generated by Timeline Editor
+# Demo Timeline v2
 # BPM 90
 
-SEQUENCE 0.00 0
-  EFFECT - FlashCubeEffect 0.00 4.00
-#  EFFECT + FlashEffect 0.00 2.00 color=1.0,0.5,0.5 decay=0.95
-#  EFFECT + FadeEffect 2.00 4.00
-#  EFFECT + SolarizeEffect 0.00 4.00
-  EFFECT + VignetteEffect 0.00 4.00 radius=0.6 softness=0.1
+SEQUENCE 0.00 0 "intro"
+  # FlashCube (placeholder) -> Vignette -> sink
+  EFFECT + PlaceholderEffect source -> temp1 0.00 4.00
+  EFFECT + PlaceholderEffect temp1 -> sink 0.00 4.00
 
-SEQUENCE 4.00 0 "rotating cube"
-  EFFECT + CircleMaskEffect 0.00 4.00 0.50
-  EFFECT + RotatingCubeEffect 0.00 4.00
-  EFFECT + GaussianBlurEffect 1.00 4.00 strength=1.0
+SEQUENCE 4.00 0 "rotating_cube"
+  # RotatingCube -> Blur -> sink
+  EFFECT + RotatingCubeEffect source -> temp1 0.00 4.00
+  EFFECT + GaussianBlurEffect temp1 -> sink 1.00 4.00
 
-SEQUENCE 8.00 0 "Flash Cube"
-  EFFECT - FlashCubeEffect 0.00 4.02
-  EFFECT + FlashEffect 0.00 0.40
+SEQUENCE 8.00 0 "flash_cube"
+  # FlashCube (placeholder) -> Flash (placeholder) -> sink
+  EFFECT - PlaceholderEffect source -> temp1 0.00 4.02
+  EFFECT + PlaceholderEffect temp1 -> sink 0.00 0.40
 
-SEQUENCE 12.00 1 "spray"
-  EFFECT + ParticleSprayEffect 0.00 2.00
-  EFFECT + ParticlesEffect 2.00 4.00
-  EFFECT = GaussianBlurEffect 0.00 4.00 strength=3.0
+SEQUENCE 12.00 1 "particles"
+  # Particles -> Blur -> sink
+  EFFECT + ParticlesEffect source -> temp1 0.00 4.00
+  EFFECT = GaussianBlurEffect temp1 -> sink 0.00 4.00
 
-SEQUENCE 16.00 2 "Hybrid3D + CNN"
-  EFFECT + ThemeModulationEffect 0.00 4.00
-  EFFECT + HeptagonEffect 0.00 4.00
-  EFFECT + ParticleSprayEffect 0.00 2.00
-  EFFECT = ParticlesEffect 2.00 4.00
-  EFFECT + Hybrid3DEffect 0.00 4.00
-  EFFECT + CNNv1Effect 0.00 4.00 layers=3 blend=.9
+SEQUENCE 16.00 2 "hybrid_heptagon"
+  # Heptagon -> Hybrid3D -> sink
+  EFFECT + HeptagonEffect source -> temp1 0.00 4.00
+  EFFECT + Hybrid3DEffect temp1 -> sink 0.00 4.00
 
-SEQUENCE 20.00 0 "CNN effect"
-  EFFECT + HeptagonEffect 0.00 8.00
-  EFFECT + Scene1Effect 0.00 8.00
-  EFFECT + CNNv1Effect 6.00 8.00 layers=3 blend=.5
+SEQUENCE 20.00 0 "heptagon_scene"
+  # Heptagon -> Scene1 (placeholder) -> sink
+  EFFECT + HeptagonEffect source -> temp1 0.00 8.00
+  EFFECT + PlaceholderEffect temp1 -> sink 0.00 8.00
 
-SEQUENCE 28.00 0 "buggy"
-  EFFECT + HeptagonEffect 0.00 2.00
-  EFFECT + FadeEffect 0.00 2.00
-
-SEQUENCE 30.00 3 "Seq-8"
-  EFFECT + ThemeModulationEffect 0.00 10.00
-  EFFECT = HeptagonEffect 0.00 10.00
-  EFFECT + GaussianBlurEffect 0.00 10.00 strength=1.5
-  EFFECT + ChromaAberrationEffect 0.00 10.00 offset=0.03 angle=0.785
-  EFFECT + SolarizeEffect 0.00 10.00
-
-SEQUENCE 40.00 2
-  EFFECT - FlashCubeEffect 0.00 4.00
-  EFFECT + HeptagonEffect 0.00 4.00
-  EFFECT + ParticleSprayEffect 0.00 4.00
-
-SEQUENCE 44.00 2 "Fade"
-  EFFECT - FlashCubeEffect 0.00 2.00
-  EFFECT + FlashEffect 1.00 2.00
-
-SEQUENCE 46.00 10
-  EFFECT - FlashCubeEffect 0.00 3.00
-  EFFECT + GaussianBlurEffect 0.00 3.00
-  EFFECT + FlashEffect 0.00 3.00
-
-SEQUENCE 49.00 1
-  EFFECT + ThemeModulationEffect 0.00 8.00
-  EFFECT + HeptagonEffect 0.00 8.00
-  EFFECT + ParticleSprayEffect 0.00 8.00
-  EFFECT + Hybrid3DEffect 0.00 8.00
-  EFFECT + GaussianBlurEffect 0.00 8.00
-  EFFECT + ChromaAberrationEffect 0.00 8.00
-
-SEQUENCE 57.00 0
-  EFFECT + ThemeModulationEffect 0.00 7.00
-  EFFECT + VignetteEffect 0.00 7.00 radius=0.6 softness=0.3
-  EFFECT + SolarizeEffect 0.00 7.00
-
-SEQUENCE 64.00 0
-  EFFECT + ThemeModulationEffect 0.00 4.00
-  EFFECT + HeptagonEffect 0.00 4.00
-  EFFECT + GaussianBlurEffect 0.00 4.00
-  EFFECT + SolarizeEffect 0.00 4.00
-
-SEQUENCE 68.00 0 "double hepta!"
-  EFFECT + ThemeModulationEffect 0.00 4.00
-  EFFECT = HeptagonEffect 0.00 4.00
-  EFFECT + Hybrid3DEffect 0.00 4.00
-  EFFECT + ParticleSprayEffect 0.00 4.00
-  EFFECT + HeptagonEffect 0.00 4.00
-  EFFECT + ChromaAberrationEffect 0.00 4.00
-  EFFECT + GaussianBlurEffect 0.00 4.00
-
-SEQUENCE 72.00 0 "The End"
-  EFFECT + ThemeModulationEffect 0.00 7.00
-  EFFECT + HeptagonEffect 0.00 7.00
-  EFFECT + ChromaAberrationEffect 0.00 7.00
-  EFFECT + GaussianBlurEffect 0.00 7.00
+SEQUENCE 28.00 0 "fade_test"
+  # Heptagon -> Fade (placeholder) -> sink
+  EFFECT + HeptagonEffect source -> temp1 0.00 2.00
+  EFFECT + PlaceholderEffect temp1 -> sink 0.00 2.00
 
+SEQUENCE 30.00 3 "complex_chain"
+  # Theme (placeholder) -> Heptagon -> Blur -> ChromaAberration (placeholder) -> Solarize (placeholder) -> sink
+  EFFECT + PlaceholderEffect source -> temp1 0.00 10.00
+  EFFECT = HeptagonEffect temp1 -> temp2 0.00 10.00
+  EFFECT + GaussianBlurEffect temp2 -> temp3 0.00 10.00
+  EFFECT + PlaceholderEffect temp3 -> temp4 0.00 10.00
+  EFFECT + PlaceholderEffect temp4 -> sink 0.00 10.00