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, 32 insertions, 0 deletions

diff --git a/src/effects/hybrid3_d_effect.h b/src/effects/hybrid3_d_effect.h
new file mode 100644
index 0000000..e6e0f49
--- /dev/null
+++ b/src/effects/hybrid3_d_effect.h
@@ -0,0 +1,32 @@
+// This file is part of the 64k demo project.
+// It declares Hybrid3DEffect (simplified v2 port).
+// TODO: Full Renderer3D integration with Scene/Camera
+
+#pragma once
+
+#include "3d/camera.h"
+#include "3d/renderer.h"
+#include "3d/scene.h"
+#include "gpu/effect.h"
+
+class Hybrid3DEffect : public Effect {
+ public:
+  Hybrid3DEffect(const GpuContext& ctx,
+                   const std::vector<std::string>& inputs,
+                   const std::vector<std::string>& outputs);
+  ~Hybrid3DEffect() override;
+
+  void declare_nodes(NodeRegistry& registry) override;
+  void render(WGPUCommandEncoder encoder,
+              const UniformsSequenceParams& params,
+              NodeRegistry& nodes) override;
+
+ private:
+  Renderer3D renderer_;
+  Scene scene_;
+  Camera camera_;
+  bool initialized_ = false;
+  std::string depth_node_;
+  WGPUTexture dummy_texture_;
+  WGPUTextureView dummy_texture_view_;
+};