tag-registry-product-link: seed 100 real preset IDs (seed-registry cmd), products/orders schema + tag linkage, fix case-sensitive tag-code bind

frontend/cmd/seed-registry/main.go

@@ -0,0 +1,75 @@
+// Command seed-registry inserts the real preset tag IDs from
+// db/preset_tag_ids.txt into the tags table (the anti-scam registry).
+// Idempotent: already-existing IDs are skipped.
+// Usage: go run ./cmd/seed-registry -registry ../db/preset_tag_ids.txt
+package main
+
+import (
+	"bufio"
+	"context"
+	"errors"
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/jackc/pgx/v5/pgconn"
+	"github.com/jackc/pgx/v5/pgxpool"
+
+	"wherewoof/frontend/internal/db"
+)
+
+func main() {
+	registryPath := flag.String("registry", "../db/preset_tag_ids.txt", "path to preset tag ID file")
+	flag.Parse()
+
+	dsn := os.Getenv("DATABASE_URL")
+	if dsn == "" {
+		fmt.Fprintln(os.Stderr, "error: DATABASE_URL not set")
+		os.Exit(1)
+	}
+
+	f, err := os.Open(*registryPath)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "error opening registry:", err)
+		os.Exit(1)
+	}
+	defer f.Close()
+
+	ctx := context.Background()
+	pool, err := pgxpool.New(ctx, dsn)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "connect:", err)
+		os.Exit(1)
+	}
+	defer pool.Close()
+
+	q := db.New(pool)
+	seeded, skipped, errs := 0, 0, 0
+	sc := bufio.NewScanner(f)
+	for sc.Scan() {
+		line := strings.TrimSpace(sc.Text())
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+		if _, err := q.InsertTag(ctx, line); err != nil {
+			var pgErr *pgconn.PgError
+			if errors.As(err, &pgErr) && pgErr.Code == "23505" {
+				skipped++
+				continue
+			}
+			fmt.Fprintln(os.Stderr, "insert", line, ":", err)
+			errs++
+			continue
+		}
+		seeded++
+	}
+	if err := sc.Err(); err != nil {
+		fmt.Fprintln(os.Stderr, "read:", err)
+		os.Exit(1)
+	}
+	fmt.Printf("registry seed: %d inserted, %d already existed, %d errors\n", seeded, skipped, errs)
+	if errs > 0 {
+		os.Exit(1)
+	}
+}