Method updateSessionStats

app/src/lib/studySessionManager.js:377–395

* Update the session statistics based on current cards

()

     * Update the session statistics based on current cards
     */
    updateSessionStats() {
        if (!this.session || !this.session.cards) return;

        const cards = this.session.cards;
        const newCards = cards.filter(card => card.reviewState === 'new').length;
        const learningCards = cards.filter(card =>
            card.reviewState === 'learning' || card.reviewState === 'relearning'
        ).length;
        const dueCards = cards.filter(card =>
            card.reviewState === 'review' && new Date(card.nextReviewDate) <= new Date()
        ).length;

        this.session.stats = {
            new: newCards,
            learning: learningCards,
            due: dueCards,
            total: cards.length
        };
    }

    /**
     * Format a time interval for display