feat: 拼音子序列匹配+产品名拼音补全+滴数框缩窄

- 拼音匹配支持子序列(js匹配紧致霜)，排序: 前缀>子串>子序列
- 补全产品名拼音(身紧致霜膏膜等)
- 滴数输入框从65/70px缩至50px

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

frontend/src/composables/usePinyinMatch.js

@@ -76,6 +76,12 @@ const PINYIN_MAP = {
   '空': 'k', '风': 'f', '文': 'w', '月': 'y', '云': 'y',
   '五': 'w', '味': 'w', '愈': 'y', '创': 'c', '慰': 'w',
   '扁': 'b', '广': 'g', '州': 'z', '热': 'r',
+  // Product name chars
+  '身': 's', '紧': 'j', '致': 'z', '霜': 's', '膏': 'g',
+  '膜': 'm', '乳': 'r', '液': 'y', '瓶': 'p', '盒': 'h',
+  '深': 's', '层': 'c', '肤': 'f', '磨': 'm', '砂': 's',
+  '龄': 'l', '无': 'w', '年': 'n', '华': 'h', '娇': 'j',
+  '颜': 'y', '喷': 'p', '雾': 'w',
 }
 
 /**
@@ -95,12 +101,42 @@ export function getPinyinInitials(name) {
 
 /**
  * Check if a query matches a name by pinyin initials.
- * The query is matched as a prefix or substring of the pinyin initials.
+ * Supports: prefix match, substring match, and subsequence match.
  */
 export function matchesPinyinInitials(name, query) {
   if (!query || !name) return false
   const initials = getPinyinInitials(name)
   if (!initials) return false
   const q = query.toLowerCase()
-  return initials.startsWith(q)
+  // Prefix or substring (consecutive)
+  if (initials.includes(q)) return true
+  // Subsequence: each char of q appears in order in initials
+  let pos = 0
+  for (const ch of q) {
+    pos = initials.indexOf(ch, pos)
+    if (pos === -1) return false
+    pos++
+  }
+  return true
+}
+
+/**
+ * Score how well a query matches pinyin initials.
+ * 0 = prefix, 1 = substring, 2 = subsequence, -1 = no match
+ */
+export function pinyinMatchScore(name, query) {
+  if (!query || !name) return -1
+  const initials = getPinyinInitials(name)
+  if (!initials) return -1
+  const q = query.toLowerCase()
+  if (initials.startsWith(q)) return 0
+  if (initials.includes(q)) return 1
+  // Subsequence check
+  let pos = 0
+  for (const ch of q) {
+    pos = initials.indexOf(ch, pos)
+    if (pos === -1) return -1
+    pos++
+  }
+  return 2
 }