test: 智能识别与英文名搜索的单测 + e2e

- 将粘贴解析抽到 useOilProductPaste composable
- 8 条 vitest 覆盖价格/规格/中英文名/类型判断
- 2 条 cypress 覆盖 UI 填充（产品 100ml、精油 15ml）
- 补英文名搜索 e2e；旧 search 用例 placeholder 选择器宽松化

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/composables/useOilProductPaste.js

@@ -0,0 +1,52 @@
+const OIL_VOLUMES = new Set(['2.5', '5', '10', '15', '115'])
+
+export function parseOilProductPaste(raw) {
+  const result = {
+    type: 'product',
+    cn: '',
+    en: '',
+    memberPrice: null,
+    retailPrice: null,
+    volume: null,
+    customDrops: null,
+    productAmount: null,
+    productUnit: null,
+  }
+  if (!raw || !raw.trim()) return result
+
+  const text = raw.replace(/[：:]/g, ':').replace(/[￥¥]/g, '')
+
+  const memberMatch = text.match(/(?:优惠顾客价|会员价|批发价)\s*:?\s*(\d+(?:\.\d+)?)/)
+  const retailMatch = text.match(/零售价\s*:?\s*(\d+(?:\.\d+)?)/)
+  const specMatch = text.match(/规格\s*:?\s*(\d+(?:\.\d+)?)\s*(毫升|ml|ML|克|g|G|颗|粒|片)/)
+
+  if (memberMatch) result.memberPrice = Number(memberMatch[1])
+  if (retailMatch) result.retailPrice = Number(retailMatch[1])
+
+  for (const line of raw.split(/\r?\n/)) {
+    const s = line.trim()
+    if (!s) continue
+    if (/优惠顾客价|会员价|零售价|点数|规格|PT\s*:|批发价/i.test(s)) continue
+    const m = s.match(/^([^A-Za-z]+?)\s+([A-Za-z].*)$/)
+    if (m) { result.cn = m[1].trim(); result.en = m[2].trim() } else { result.cn = s }
+    break
+  }
+
+  if (specMatch) {
+    const amount = specMatch[1]
+    const unitRaw = specMatch[2].toLowerCase()
+    const isMl = unitRaw === '毫升' || unitRaw === 'ml'
+    if (isMl && OIL_VOLUMES.has(String(Number(amount)))) {
+      result.type = 'oil'
+      result.volume = String(Number(amount))
+    } else {
+      result.type = 'product'
+      result.productAmount = Number(amount)
+      result.productUnit = (unitRaw === '克' || unitRaw === 'g') ? 'g'
+        : (unitRaw === '颗' || unitRaw === '粒' || unitRaw === '片') ? 'capsule'
+        : 'ml'
+    }
+  }
+
+  return result
+}