Refine stock import UX with suggestions, ignore rules, and inline mapping controls

migrations/018_add_stock_ignore_rules.sql

@@ -0,0 +1,10 @@
+CREATE TABLE IF NOT EXISTS stock_ignore_rules (
+    id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
+    target VARCHAR(20) NOT NULL,
+    match_type VARCHAR(20) NOT NULL,
+    pattern VARCHAR(500) NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (id),
+    UNIQUE KEY uq_stock_ignore_rule (target, match_type, pattern),
+    KEY idx_stock_ignore_target (target)
+);