Product category picker — native source (prod)

Gate 2 7/7 passed + 51/51 regression. nix-cafe 01a7820, no migration. Root cause: the product edit dropdown and the products-list category rail read the legacy Odoo-mirror category list (odoo_pos_categ_id IS NOT NULL — only 6 stale rows) on Pro tenants, while everything else (the Categories settings page, the POS pill strip + filter) reads the native cafe.product_categories the user actually manages. Both product pages now read native categories on all tiers — with bypass_odoo_pos universal, the editable catalog categories are native everywhere.

Data remap. 18 product templates were linked to mirror category rows (13 → “Coffee”, 4 → “HOT MILK TEA”, 1 → “Tea”). Each mirror category had exactly one same-name native twin, so those templates were remapped to the native category — otherwise the fix would have made them display as “Uncategorized”. After the remap 0 templates reference a mirror category. (Flagged for a later cleanup: a few duplicate native rows exist — JUICE SMOOTHIE ×3, MANGO CREAM SERIES ×2 — dedupe on the Categories page; and the 6 now-empty mirror rows can be deleted.)