refactor: Store const GpuContext& in Effect base class

- Changed Effect to store ctx_ reference instead of device_/queue_/format_
- Updated all 19 effect implementations to access ctx_.device/queue/format
- Simplified Effect constructor: ctx_(ctx) vs device_(ctx.device), queue_(ctx.queue), format_(ctx.format)
- All 28 tests pass, all targets build successfully

1 files changed, 3 insertions, 3 deletions

diff --git a/src/gpu/effects/moving_ellipse_effect.cc b/src/gpu/effects/moving_ellipse_effect.cc
index 1163215..94596df 100644
--- a/src/gpu/effects/moving_ellipse_effect.cc
+++ b/src/gpu/effects/moving_ellipse_effect.cc
@@ -8,11 +8,11 @@
 MovingEllipseEffect::MovingEllipseEffect(const GpuContext& ctx)
     : Effect(ctx) {
   uniforms_ =
-      gpu_create_buffer(device_, sizeof(float) * 6,
+      gpu_create_buffer(ctx_.device, sizeof(float) * 6,
                         WGPUBufferUsage_Uniform | WGPUBufferUsage_CopyDst);
   ResourceBinding bindings[] = {{uniforms_, WGPUBufferBindingType_Uniform}};
   pass_ =
-      gpu_create_render_pass(device_, format_, ellipse_shader_wgsl, bindings, 1);
+      gpu_create_render_pass(ctx_.device, ctx_.format, ellipse_shader_wgsl, bindings, 1);
   pass_.vertex_count = 3;
 }
 void MovingEllipseEffect::render(WGPURenderPassEncoder pass, float t, float b,
@@ -20,7 +20,7 @@ void MovingEllipseEffect::render(WGPURenderPassEncoder pass, float t, float b,
   struct {
     float t, b, i, a, w, h;
   } u = {t, b, i, a, (float)width_, (float)height_};
-  wgpuQueueWriteBuffer(queue_, uniforms_.buffer, 0, &u, sizeof(u));
+  wgpuQueueWriteBuffer(ctx_.queue, uniforms_.buffer, 0, &u, sizeof(u));
   wgpuRenderPassEncoderSetPipeline(pass, pass_.pipeline);
   wgpuRenderPassEncoderSetBindGroup(pass, 0, pass_.bind_group, 0, nullptr);
   wgpuRenderPassEncoderDraw(pass, 3, 1, 0, 0);