Method saveSetting

chat/db.js:610–619

(key, value)

                    resolve();
                }
            };
            request.onerror = () => reject(request.error);
        });
    }

    async deleteMessage(messageId) {
        return new Promise((resolve, reject) => {
            const transaction = this.db.transaction(['messages'], 'readwrite');
            const store = transaction.objectStore('messages');
            const request = store.delete(messageId);

            request.onsuccess = () => {
                this.emitStorageEvent('messages-updated', { messageId });