refactor: move common/shaders/ to src/shaders/

Relocates shared WGSL shaders under src/ where all source code lives,
eliminating the top-level common/ directory.

- Update asset references in workspaces/main/assets.txt and workspaces/test/assets.txt
- Update docs: PROJECT_CONTEXT.md, ARCHITECTURE.md, WORKSPACE_SYSTEM.md, SHADER_REUSE_INVESTIGATION.md

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

1 files changed, 0 insertions, 61 deletions

diff --git a/common/shaders/postprocess_inline.wgsl b/common/shaders/postprocess_inline.wgsl
deleted file mode 100644
index 84ef3d3..0000000
--- a/common/shaders/postprocess_inline.wgsl
+++ /dev/null
@@ -1,61 +0,0 @@
-// Inline post-process functions for simple effects
-// Use these instead of separate effect classes for v2 sequences
-
-// Vignette: darkens edges based on distance from center
-fn apply_vignette(color: vec4f, uv: vec2f, radius: f32, softness: f32, intensity: f32) -> vec4f {
-  let d = distance(uv, vec2f(0.5, 0.5));
-  let vignette = smoothstep(radius, radius - softness, d);
-  return vec4f(color.rgb * mix(1.0, vignette, intensity), color.a);
-}
-
-// Flash: additive white flash
-fn apply_flash(color: vec4f, flash_intensity: f32) -> vec4f {
-  return color + vec4f(flash_intensity, flash_intensity, flash_intensity, 0.0);
-}
-
-// Fade: linear interpolation to target color
-fn apply_fade(color: vec4f, fade_amount: f32, fade_color: vec3f) -> vec4f {
-  return vec4f(mix(color.rgb, fade_color, fade_amount), color.a);
-}
-
-// Theme modulation: multiply by color tint
-fn apply_theme(color: vec4f, theme_color: vec3f, strength: f32) -> vec4f {
-  return vec4f(mix(color.rgb, color.rgb * theme_color, strength), color.a);
-}
-
-// Solarize: threshold-based color inversion
-fn apply_solarize(color: vec4f, threshold: f32, strength: f32, time: f32) -> vec4f {
-  let pattern_num = u32(time / 2.0);
-  let is_even = (pattern_num % 2u) == 0u;
-  let thr = threshold + 0.15 * sin(time);
-  var col = color;
-  
-  if (is_even) {
-    if (col.r < thr) { col.r = mix(col.r, 1.0 - col.r, strength); }
-    if (col.g < thr) { col.g = mix(col.g, 1.0 - col.g * 0.7, strength * 0.7); }
-    if (col.b < thr) { col.b = mix(col.b, col.b * 0.5, strength); }
-  } else {
-    if (col.r < thr) { col.r = mix(col.r, col.r * 0.6, strength); }
-    if (col.g < thr) { col.g = mix(col.g, 1.0 - col.g * 0.8, strength * 0.8); }
-    if (col.b < thr) { col.b = mix(col.b, 1.0 - col.b, strength); }
-  }
-  return col;
-}
-
-// Chroma aberration: RGB channel offset
-fn apply_chroma_aberration(input_tex: texture_2d<f32>, input_sampler: sampler, 
-                           uv: vec2f, offset: f32, resolution: vec2f) -> vec4f {
-  let pixel_offset = offset / resolution;
-  let r = textureSample(input_tex, input_sampler, uv + vec2f(pixel_offset.x, 0.0)).r;
-  let g = textureSample(input_tex, input_sampler, uv).g;
-  let b = textureSample(input_tex, input_sampler, uv - vec2f(pixel_offset.x, 0.0)).b;
-  let a = textureSample(input_tex, input_sampler, uv).a;
-  return vec4f(r, g, b, a);
-}
-
-// Distort: UV distortion based on time
-fn apply_distort(uv: vec2f, time: f32, strength: f32) -> vec2f {
-  let distort_x = sin(uv.y * 10.0 + time * 2.0) * strength;
-  let distort_y = cos(uv.x * 10.0 + time * 2.0) * strength;
-  return uv + vec2f(distort_x, distort_y);
-}