Method checkHasFlashcard

src/services/comment/CommentService.ts:275–283

* 检查高亮是否已经创建了闪卡

(highlightId: string)

     * 检查高亮是否已经创建了闪卡
     */
    private checkHasFlashcard(highlightId: string): boolean {
        const fsrsManager = this.plugin.fsrsManager;
        if (!fsrsManager || !highlightId) {
            return false;
        }
        
        const cards = fsrsManager.findCardsBySourceId(highlightId, 'highlight');
        return cards && cards.length > 0;
    }
}