從街頭到展牆

// 營運進度：只計當月 + 已確認 + 一般贊助
const thisMonthSponsors = sponsors.filter((s) => {
  const d = new Date(s.created_at)
  return d.getFullYear() === now.getFullYear()
    && d.getMonth() === now.getMonth()
    && s.fund_type !== 'exhibition'
})
const thisMonthTotal = thisMonthSponsors
  .reduce((sum, s) => sum + s.amount, 0)
const monthlyPercentage = (thisMonthTotal / 2964) * 100

// 展覽基金 = 直接指定 + 每月溢出
const directExhibition = sponsors
  .filter((s) => s.fund_type === 'exhibition')
  .reduce((sum, s) => sum + s.amount, 0)

const monthlyTotals = generalSponsors.reduce((acc, s) => {
  const key = `${year}-${month}`
  acc[key] = (acc[key] || 0) + s.amount
  return acc
}, {})
const overflowFund = Object.values(monthlyTotals)
  .reduce((sum, m) => sum + Math.max(0, m - 2964), 0)

const exhibitionFund = directExhibition + overflowFund