refactor(cnn): rename cnn_effect to cnn_v1_effect for clarity

Renamed files and classes:
- cnn_effect.{h,cc} → cnn_v1_effect.{h,cc}
- CNNEffect → CNNv1Effect
- CNNEffectParams → CNNv1EffectParams
- CNNLayerParams → CNNv1LayerParams
- CNN_EFFECT.md → CNN_V1_EFFECT.md

Updated all references:
- C++ includes and class usage
- CMake source list
- Timeline (workspaces/main/timeline.seq)
- Test file (test_demo_effects.cc)
- Documentation (CLAUDE.md, PROJECT_CONTEXT.md, READMEs)

Tests: 34/34 passing (100%)

1 files changed, 7 insertions, 7 deletions

diff --git a/workspaces/main/assets.txt b/workspaces/main/assets.txt
index e1cf2bc..189e965 100644
--- a/workspaces/main/assets.txt
+++ b/workspaces/main/assets.txt
@@ -37,13 +37,13 @@ SHADER_PASSTHROUGH, NONE, ../../common/shaders/passthrough.wgsl, "Passthrough Sh
 SHADER_ELLIPSE, NONE, shaders/ellipse.wgsl, "Ellipse Shader"
 SHADER_PARTICLE_SPRAY_COMPUTE, NONE, shaders/particle_spray_compute.wgsl, "Particle Spray Compute"
 SHADER_GAUSSIAN_BLUR, NONE, shaders/gaussian_blur.wgsl, "Gaussian Blur Shader"
-SHADER_CNN_ACTIVATION, NONE, shaders/cnn/cnn_activation.wgsl, "CNN Activation Functions"
-SHADER_CNN_CONV1X1, NONE, shaders/cnn/cnn_conv1x1.wgsl, "CNN 1x1 Convolution"
-SHADER_CNN_CONV3X3, NONE, shaders/cnn/cnn_conv3x3.wgsl, "CNN 3x3 Convolution"
-SHADER_CNN_CONV5X5, NONE, shaders/cnn/cnn_conv5x5.wgsl, "CNN 5x5 Convolution"
-SHADER_CNN_CONV7X7, NONE, shaders/cnn/cnn_conv7x7.wgsl, "CNN 7x7 Convolution"
-SHADER_CNN_WEIGHTS, NONE, shaders/cnn/cnn_weights_generated.wgsl, "CNN Weights (Generated)"
-SHADER_CNN_LAYER, NONE, shaders/cnn/cnn_layer.wgsl, "CNN Layer Shader"
+SHADER_CNN_ACTIVATION, NONE, ../../cnn_v1/shaders/cnn_activation.wgsl, "CNN Activation Functions"
+SHADER_CNN_CONV1X1, NONE, ../../cnn_v1/shaders/cnn_conv1x1.wgsl, "CNN 1x1 Convolution"
+SHADER_CNN_CONV3X3, NONE, ../../cnn_v1/shaders/cnn_conv3x3.wgsl, "CNN 3x3 Convolution"
+SHADER_CNN_CONV5X5, NONE, ../../cnn_v1/shaders/cnn_conv5x5.wgsl, "CNN 5x5 Convolution"
+SHADER_CNN_CONV7X7, NONE, ../../cnn_v1/shaders/cnn_conv7x7.wgsl, "CNN 7x7 Convolution"
+SHADER_CNN_WEIGHTS, NONE, ../../cnn_v1/shaders/cnn_weights_generated.wgsl, "CNN Weights (Generated)"
+SHADER_CNN_LAYER, NONE, ../../cnn_v1/shaders/cnn_layer.wgsl, "CNN Layer Shader"
 SHADER_CNN_V2_STATIC, NONE, ../../cnn_v2/shaders/cnn_v2_static.wgsl, "CNN v2 Static Features"
 SHADER_CNN_V2_COMPUTE, NONE, ../../cnn_v2/shaders/cnn_v2_compute.wgsl, "CNN v2 Compute (Storage Buffer)"
 WEIGHTS_CNN_V2, NONE, ../../cnn_v2/weights/cnn_v2_weights.bin, "CNN v2 Binary Weights"