Writes, generates, visually verifies, and iterates on seamless/tileable surface-design patterns — florals, geometrics, stripes, damask, plaids, novelty prints — and tileable material textures — fabric weaves, paper grain, wood, stone, leather, packaging substrates — for wallpaper, packaging, textile print, and digital surface design. Trigger on explicit requests using phrases like "seamless pattern," "tileable," "repeating pattern," "wallpaper design," "fabric print/texture," "packaging surface pattern," "surface design," or "this needs to tile edge to edge." Triggers on explicit request only — it does not auto-wire from `brand-identity-sheet`, `moodboard-generator`, or a…