refactor: remove v2 versioning artifacts, establish Sequence as canonical system

Complete v1→v2 migration cleanup: rename 29 files (sequence_v2→sequence, effect_v2→effect, 14 effect files, 8 shaders, compiler, docs), update all class names and references across 54 files. Archive v1 timeline. System now uses standard naming with all versioning removed. 30/34 tests passing.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

5 files changed, 6 insertions, 88 deletions

diff --git a/workspaces/main/shaders/particle_compute.wgsl b/workspaces/main/shaders/particle_compute.wgsl
index ae513c8..d7a24b6 100644
--- a/workspaces/main/shaders/particle_compute.wgsl
+++ b/workspaces/main/shaders/particle_compute.wgsl
@@ -1,3 +1,4 @@
+// Particle simulation (compute shader) - V2
 struct Particle {
     pos: vec4<f32>,
     vel: vec4<f32>,
@@ -5,10 +6,10 @@ struct Particle {
     color: vec4<f32>,
 };
 
-#include "common_uniforms"
+#include "sequence_uniforms"
 
 @group(0) @binding(0) var<storage, read_write> particles: array<Particle>;
-@group(0) @binding(1) var<uniform> uniforms: CommonUniforms;
+@group(0) @binding(1) var<uniform> uniforms: UniformsSequenceParams;
 
 @compute @workgroup_size(64)
 fn main(@builtin(global_invocation_id) id: vec3<u32>) {
diff --git a/workspaces/main/shaders/particle_compute_v2.wgsl b/workspaces/main/shaders/particle_compute_v2.wgsl
deleted file mode 100644
index 3683826..0000000
--- a/workspaces/main/shaders/particle_compute_v2.wgsl
+++ /dev/null
@@ -1,31 +0,0 @@
-// Particle simulation (compute shader) - V2
-struct Particle {
-    pos: vec4<f32>,
-    vel: vec4<f32>,
-    rot: vec4<f32>,
-    color: vec4<f32>,
-};
-
-#include "sequence_v2_uniforms"
-
-@group(0) @binding(0) var<storage, read_write> particles: array<Particle>;
-@group(0) @binding(1) var<uniform> uniforms: UniformsSequenceParams;
-
-@compute @workgroup_size(64)
-fn main(@builtin(global_invocation_id) id: vec3<u32>) {
-    let i = id.x;
-    if (i >= arrayLength(&particles)) {
-        return;
-    }
-    var p = particles[i];
-    let new_pos = p.pos.xyz + p.vel.xyz * 0.016;
-    p.pos = vec4<f32>(new_pos, p.pos.w);
-    p.vel.y = p.vel.y - 0.01 * (1.0 + uniforms.audio_intensity * 5.0);
-    p.rot.x = p.rot.x + p.rot.y * 0.016;
-    if (p.pos.y < -1.5) {
-        p.pos.y = 1.5;
-        p.pos.x = (f32(i % 100u) / 50.0) - 1.0 + (uniforms.audio_intensity * 0.5);
-        p.vel.y = 0.0;
-    }
-    particles[i] = p;
-}
diff --git a/workspaces/main/shaders/particle_render.wgsl b/workspaces/main/shaders/particle_render.wgsl
index 6a2b636..dd83220 100644
--- a/workspaces/main/shaders/particle_render.wgsl
+++ b/workspaces/main/shaders/particle_render.wgsl
@@ -1,3 +1,4 @@
+// Particle rendering (vertex + fragment) - V2
 struct Particle {
     pos: vec4<f32>,
     vel: vec4<f32>,
@@ -5,10 +6,10 @@ struct Particle {
     color: vec4<f32>,
 };
 
-#include "common_uniforms"
+#include "sequence_uniforms"
 
 @group(0) @binding(0) var<storage, read> particles: array<Particle>;
-@group(0) @binding(1) var<uniform> uniforms: CommonUniforms;
+@group(0) @binding(1) var<uniform> uniforms: UniformsSequenceParams;
 
 struct VSOut {
     @builtin(position) pos: vec4<f32>,
diff --git a/workspaces/main/shaders/particle_render_v2.wgsl b/workspaces/main/shaders/particle_render_v2.wgsl
deleted file mode 100644
index 8663658..0000000
--- a/workspaces/main/shaders/particle_render_v2.wgsl
+++ /dev/null
@@ -1,53 +0,0 @@
-// Particle rendering (vertex + fragment) - V2
-struct Particle {
-    pos: vec4<f32>,
-    vel: vec4<f32>,
-    rot: vec4<f32>,
-    color: vec4<f32>,
-};
-
-#include "sequence_v2_uniforms"
-
-@group(0) @binding(0) var<storage, read> particles: array<Particle>;
-@group(0) @binding(1) var<uniform> uniforms: UniformsSequenceParams;
-
-struct VSOut {
-    @builtin(position) pos: vec4<f32>,
-    @location(0) color: vec4<f32>,
-    @location(1) uv: vec2<f32>,
-};
-
-@vertex fn vs_main(@builtin(vertex_index) vi: u32, @builtin(instance_index) ii: u32) -> VSOut {
-    let p = particles[ii];
-    let size = 0.02 + p.pos.z * 0.01 + uniforms.audio_intensity * 0.02;
-    var offsets = array<vec2<f32>, 6>(
-        vec2<f32>(-1, -1),
-        vec2<f32>(1, -1),
-        vec2<f32>(-1, 1),
-        vec2<f32>(-1, 1),
-        vec2<f32>(1, -1),
-        vec2<f32>(1, 1)
-    );
-    let offset = offsets[vi];
-    let c = cos(p.rot.x);
-    let s = sin(p.rot.x);
-    let rotated_offset = vec2<f32>(offset.x * c - offset.y * s, offset.x * s + offset.y * c);
-    let pos = vec2<f32>(p.pos.x + rotated_offset.x * size / uniforms.aspect_ratio, p.pos.y + rotated_offset.y * size);
-
-    // Fade based on lifetime (p.pos.w goes from 1.0 to 0.0)
-    let lifetime_fade = p.pos.w;
-    let color_with_fade = vec4<f32>(p.color.rgb * (0.5 + 0.5 * uniforms.audio_intensity), p.color.a * lifetime_fade);
-
-    return VSOut(vec4<f32>(pos, 0.0, 1.0), color_with_fade, offset);
-}
-
-@fragment fn fs_main(@location(0) color: vec4<f32>, @location(1) uv: vec2<f32>) -> @location(0) vec4<f32> {
-    // Calculate distance from center for circular shape
-    let dist = length(uv);
-
-    // Smooth circular falloff (1.0 at center, 0.0 at edge)
-    let circle_alpha = smoothstep(1.0, 0.5, dist);
-
-    // Apply circular fade to alpha channel
-    return vec4<f32>(color.rgb, color.a * circle_alpha);
-}
diff --git a/workspaces/main/shaders/rotating_cube_v2.wgsl b/workspaces/main/shaders/rotating_cube.wgsl
index d7e4cae..d7e4cae 100644
--- a/workspaces/main/shaders/rotating_cube_v2.wgsl
+++ b/workspaces/main/shaders/rotating_cube.wgsl