Function removePeriodFromDayPlans

docs/assets/script.js:5550–5578

* 从 day_plans 中批量移除对某 period 的引用

(lines, sectionInfo, periodKey)

 * 从 day_plans 中批量移除对某 period 的引用
 */
function removePeriodFromDayPlans(lines, sectionInfo, periodKey) {
    const dayPlansLine = findChildKey(lines, sectionInfo.start, sectionInfo.end, sectionInfo.indent, 'day_plans');
    if (dayPlansLine < 0) return;

    const dpIndent = lines[dayPlansLine].search(/\S/);
    const sectionEnd = findBlockEnd(lines, sectionInfo.start, sectionInfo.indent, lines.length);
    const dpEnd = findBlockEnd(lines, dayPlansLine, dpIndent, sectionEnd);

    for (let i = dayPlansLine + 1; i < dpEnd; i++) {
        const line = lines[i];
        if (line.trim() === '' || line.trim().startsWith('#')) continue;
        const listMatch = line.match(/^(\s*)-\s*(\S+)\s*$/);
        if (listMatch && listMatch[2] === periodKey) {
            lines.splice(i, 1);
            i--;
            continue;
        }
        const inlineMatch = line.match(/^(\s*periods:\s*)\[([^\]]*)\]/);
        if (inlineMatch) {
            const items = inlineMatch[2].split(',').map(s => s.trim()).filter(s => {
                const bare = s.replace(/^["']|["']$/g, '');
                return bare && bare !== periodKey;
            });
            lines[i] = items.length > 0
                ? `${inlineMatch[1]}[${items.join(', ')}]`
                : `${inlineMatch[1]}[]`;
        }
    }
}

/**
 * 从指定 day_plan 中移除单个 period 引用