Pin SDA copy to the exact canonical compute-pool API (#2)

Canonicalize SDA a11oy domain references (#1)

Visual polish: additive CSS/motion/a11y/meta only; all visible copy frozen (text-diff verified). No JS/server.py/Dockerfile/.github/.compliance changes.

SZL SDA static surface — sovereign domain-superiority COP (khipu-sda-core)