fix(particles): release compute and render pass encoders

Missing wgpuComputePassEncoderRelease/wgpuRenderPassEncoderRelease
caused per-frame leaks and command buffer corruption in wgpu-native.

handoff(Gemini): particles encoder leak fixed, 2 lines added to render()

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/effects/particles_effect.cc b/src/effects/particles_effect.cc
index fc37a88..35caa1c 100644
--- a/src/effects/particles_effect.cc
+++ b/src/effects/particles_effect.cc
@@ -73,6 +73,7 @@ void Particles::render(WGPUCommandEncoder encoder,
   wgpuComputePassEncoderDispatchWorkgroups(
       compute, compute_pass_.workgroup_size_x, 1, 1);
   wgpuComputePassEncoderEnd(compute);
+  wgpuComputePassEncoderRelease(compute);
 
   // Run render pass (draw particles to output)
   WGPUTextureView output_view = nodes.get_view(output_nodes_[0]);
@@ -91,4 +92,5 @@ void Particles::render(WGPUCommandEncoder encoder,
   wgpuRenderPassEncoderDraw(pass, render_pass_.vertex_count,
                             render_pass_.instance_count, 0, 0);
   wgpuRenderPassEncoderEnd(pass);
+  wgpuRenderPassEncoderRelease(pass);
 }