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/peak_meter_effect.cc b/src/effects/peak_meter_effect.cc
index 692d851..124c59b 100644
--- a/src/effects/peak_meter_effect.cc
+++ b/src/effects/peak_meter_effect.cc
@@ -5,7 +5,7 @@
 #include "gpu/shader_composer.h"
 #include "util/fatal_error.h"
 
-PeakMeterEffect::PeakMeterEffect(const GpuContext& ctx,
+PeakMeter::PeakMeter(const GpuContext& ctx,
                                  const std::vector<std::string>& inputs,
                                  const std::vector<std::string>& outputs)
     : Effect(ctx, inputs, outputs), pipeline_(nullptr), bind_group_(nullptr) {
@@ -63,12 +63,12 @@ PeakMeterEffect::PeakMeterEffect(const GpuContext& ctx,
                                            shader_code.c_str());
 }
 
-PeakMeterEffect::~PeakMeterEffect() {
+PeakMeter::~PeakMeter() {
   if (bind_group_) wgpuBindGroupRelease(bind_group_);
   if (pipeline_) wgpuRenderPipelineRelease(pipeline_);
 }
 
-void PeakMeterEffect::render(WGPUCommandEncoder encoder,
+void PeakMeter::render(WGPUCommandEncoder encoder,
                              const UniformsSequenceParams& params,
                              NodeRegistry& nodes) {
   WGPUTextureView input_view = nodes.get_view(input_nodes_[0]);