Add Shader Cursor Trail Implement the exact trail as progressive enhancement. Preserve the host section's semantic content, imagery, controls, and static first frame. Workflow 1. Inspect the framework, rendering mode, existing motion stack, layer order, reduced-motion rules, and package manager. Do not add another smooth-scroll engine or replace the section's content. 2. Install with the existing package manager. Import from the matching framework subpath: , , , or . 3. Read references/implementation.md before implementation. Keep the six shader nodes, their order, both invisible drivers, and…