fix zombie leak, add quiet-hours toggle, improve query reply, configurable router threshold, JS dashboard

internal/store/store.go

@@ -70,7 +70,9 @@ func Open(ctx context.Context, path string) (*Store, error) {
 	// single writer expected; the daemon is the only process touching the db.
 	db.SetMaxOpenConns(1)
 	if _, err := db.ExecContext(ctx, schemaSQL); err != nil {
-		_ = db.Close()
+		if closeErr := db.Close(); closeErr != nil {
+			return nil, fmt.Errorf("apply schema: %w (close: %v)", err, closeErr)
+		}
 		return nil, fmt.Errorf("apply schema: %w", err)
 	}
 	return &Store{db: db}, nil