[ns-ui] A feature-flag rollout picker where blast radius is computed as literal site percolation: user segments are cells in a declared-adjacency lattice, the rollout percentage wets a fixed-order prefix of cells, and union-find continuously finds the largest connected wet cluster. Its traced perimeter and
pnpm dlx shadcn@latest add "https://registry.directory/r/nikolas-sapa/seep-lattice.json"