refactor: complete removal of 'Effect' suffix from C++ class names

Update effect class definitions in headers and implementations to match
timeline.seq naming convention. All tests passing (34/34).

Classes renamed:
- PassthroughEffect → Passthrough
- GaussianBlurEffect → GaussianBlur
- PlaceholderEffect → Placeholder
- HeptagonEffect → Heptagon
- ParticlesEffect → Particles
- RotatingCubeEffect → RotatingCube
- Hybrid3DEffect → Hybrid3D
- FlashEffect → Flash
- PeakMeterEffect → PeakMeter

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

1 files changed, 3 insertions, 3 deletions

diff --git a/src/effects/heptagon_effect.cc b/src/effects/heptagon_effect.cc
index 303ab2a..755b6e3 100644
--- a/src/effects/heptagon_effect.cc
+++ b/src/effects/heptagon_effect.cc
@@ -6,7 +6,7 @@
 #include "gpu/post_process_helper.h"
 #include "gpu/shaders.h"
 
-HeptagonEffect::HeptagonEffect(const GpuContext& ctx,
+Heptagon::Heptagon(const GpuContext& ctx,
                                    const std::vector<std::string>& inputs,
                                    const std::vector<std::string>& outputs)
     : Effect(ctx, inputs, outputs), pipeline_(nullptr), bind_group_(nullptr), sampler_(nullptr) {
@@ -41,7 +41,7 @@ HeptagonEffect::HeptagonEffect(const GpuContext& ctx,
   dummy_texture_view_ = wgpuTextureCreateView(dummy_texture_, nullptr);
 }
 
-HeptagonEffect::~HeptagonEffect() {
+Heptagon::~Heptagon() {
   if (bind_group_) wgpuBindGroupRelease(bind_group_);
   if (pipeline_) wgpuRenderPipelineRelease(pipeline_);
   if (sampler_) wgpuSamplerRelease(sampler_);
@@ -49,7 +49,7 @@ HeptagonEffect::~HeptagonEffect() {
   if (dummy_texture_) wgpuTextureRelease(dummy_texture_);
 }
 
-void HeptagonEffect::render(WGPUCommandEncoder encoder,
+void Heptagon::render(WGPUCommandEncoder encoder,
                               const UniformsSequenceParams& params,
                               NodeRegistry& nodes) {
   // Get output view (scene effects typically write to output, ignore input)