SYB rows that hit a product filter rule are no longer skipped at import;
they are stored with a pdd_purchase_excluded mark (rule snapshot fixed at
row-creation time, never changed by a later resync), get a new
pdd_excluded process stage ("无需采购"), are hard-rejected by every PDD
entry point (purchase create/batch create/batch preview, collection and
AI-match eligibility, image search batch collection, quick-replace via
the new stage), and can still participate in #338 return matching.
Adds an admin-only recompute preview/execute pair in sybproductfilter to
re-derive marks against the current rules, skipping any row with a
purchase task or an active return match, with an audit log row per run.
sybimport.List gets a purchaseType filter (pdd/excluded/all, AND with
processStage).
Migration: cmd/migrate/migration/version-local/1789801100000 (additive
columns/table, all existing rows default to "needs PDD purchase").
Web UI is out of scope, pending prototype approval.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NTDbDcwbDw1TSAcE6wfh2F