fix: seed-admin emits $2y$ bcrypt prefix so Laravel admin login works (was $2a$ -> 500 'does not use the Bcrypt algorithm')

frontend/cmd/seed-admin/main.go

@@ -40,6 +40,10 @@ func main() {
 		fmt.Fprintln(os.Stderr, "hash:", err)
 		os.Exit(1)
 	}
+	// Go's bcrypt emits "$2a$"; PHP/Laravel login requires "$2y$" (same
+	// algorithm, different marker). Rewrite the prefix so the admin can log
+	// into the Filament panel. Both Go and PHP verify either prefix.
+	hash = "$2y$" + hash[4:]
 
 	ctx := context.Background()
 	pool, err := pgxpool.New(ctx, dsn)