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, 4 insertions, 4 deletions

diff --git a/src/gpu/effects/passthrough_effect.cc b/src/gpu/effects/passthrough_effect.cc
index 203f912..1aebb28 100644
--- a/src/gpu/effects/passthrough_effect.cc
+++ b/src/gpu/effects/passthrough_effect.cc
@@ -8,15 +8,15 @@
 PassthroughEffect::PassthroughEffect(const GpuContext& ctx)
     : PostProcessEffect(ctx) {
   uniforms_ =
-      gpu_create_buffer(device_, sizeof(float) * 6,
+      gpu_create_buffer(ctx_.device, sizeof(float) * 6,
                         WGPUBufferUsage_Uniform | WGPUBufferUsage_CopyDst);
   pipeline_ =
-      create_post_process_pipeline(device_, format_, passthrough_shader_wgsl);
+      create_post_process_pipeline(ctx_.device, ctx_.format, passthrough_shader_wgsl);
 }
 void PassthroughEffect::update_bind_group(WGPUTextureView input_view) {
   struct {
     float t, b, i, a, w, h;
   } u = {0, 0, 0, 0, (float)width_, (float)height_};
-  wgpuQueueWriteBuffer(queue_, uniforms_.buffer, 0, &u, sizeof(u));
-  pp_update_bind_group(device_, pipeline_, &bind_group_, input_view, uniforms_);
+  wgpuQueueWriteBuffer(ctx_.queue, uniforms_.buffer, 0, &u, sizeof(u));
+  pp_update_bind_group(ctx_.device, pipeline_, &bind_group_, input_view, uniforms_);
 }