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code/g3soft-libs/packages/ui/probe-correct.mjs

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+import { chromium } from '@playwright/test'
+
+/**
+ * 用**正确阈值**重测。
+ * 之前的探针用 r<246 判"深色"，而表头底色是 245 → 被误判成线。
+ * 边框线是 217，白底是 255，表头灰是 245。
+ * 正确判据：只看接近 217 的像素（容差 ±6），把 245 和 255 都当作"非线"。
+ */
+const BASE = process.env.PROBE_URL || 'http://localhost:5200'
+const LINE = 217
+const TOL = 6
+
+const isLine = ([r, g, b]) =>
+  Math.abs(r - LINE) <= TOL && Math.abs(g - LINE) <= TOL && Math.abs(b - LINE) <= TOL
+
+const browser = await chromium.launch()
+const page = await browser.newPage({ viewport: { width: 1400, height: 1200 } })
+await page.goto(BASE, { waitUntil: 'networkidle' })
+
+const clipSample = async (x, y, w, h) => {
+  const shot = await page.screenshot({ clip: { x, y, width: w, height: h } })
+  return page.evaluate(async (dataUrl) => {
+    const img = new Image()
+    await new Promise((res) => {
+      img.onload = res
+      img.src = dataUrl
+    })
+    const cv = document.createElement('canvas')
+    cv.width = img.width
+    cv.height = img.height
+    const ctx = cv.getContext('2d')
+    ctx.drawImage(img, 0, 0)
+    const d = ctx.getImageData(0, 0, img.width, img.height).data
+    const out = []
+    for (let i = 0; i < d.length; i += 4) out.push([d[i], d[i + 1], d[i + 2]])
+    return out
+  }, `data:image/png;base64,${shot.toString('base64')}`)
+}
+
+const heights = [500, 400, 350, 300, 250, 200, 180, 160, 150, 140, 130, 120, 110, 100, 90, 80]
+
+console.log('=== 正确阈值（只认 217±6，245/255 均视为非线）===')
+console.log('容器高 | 底边像素(217线) | 线数 | 判定')
+let bad = 0
+for (const h of heights) {
+  await page.evaluate((hh) => {
+    document.querySelector('[data-testid="table-big-wrap"]').style.height = `${hh}px`
+  }, h)
+  await page.waitForTimeout(420)
+  await page.locator('[data-testid="table-big-wrap"]').scrollIntoViewIfNeeded()
+  await page.waitForTimeout(180)
+
+  const g = await page.evaluate(() => {
+    const wrap = document.querySelector('[data-testid="table-big-wrap"]')
+    const root = wrap.querySelector('.g3-table')
+    const r = root.getBoundingClientRect()
+    return { left: Math.round(r.left), bottom: Math.round(r.bottom) }
+  })
+  const y = Math.max(0, g.bottom - 5)
+  if (1200 - y < 12) continue
+  const px = await clipSample(g.left + 300, y, 1, 12)
+  const vec = px.map((p) => (isLine(p) ? 1 : 0))
+  const n = vec.reduce((a, b) => a + b, 0)
+  if (n !== 1) bad += 1
+  console.log(
+    `${String(h).padStart(6)} | ${vec.join('')} | ${String(n).padStart(4)} | ${n === 1 ? '✅ 一条线' : n === 0 ? '❌ 缺线' : '❌ ' + n + ' 条'}`,
+  )
+}
+console.log(`\n失败档位: ${bad} 个`)
+
+await browser.close()