feat: 价目搜索支持英文名（card.en / meta.enName / 静态表）

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

frontend/src/views/OilReference.vue

@@ -91,7 +91,7 @@
     <!-- Search + View Toggle + Add + PDF -->
     <div style="display:flex;gap:6px;align-items:center;margin-bottom:12px;flex-wrap:nowrap">
       <div class="search-box" style="flex:1;min-width:140px;margin-bottom:0">
-        <input class="search-input" v-model="searchQuery" placeholder="搜索精油名称…" style="width:100%" />
+        <input class="search-input" v-model="searchQuery" placeholder="搜索中文或英文名…" style="width:100%" />
       </div>
       <div style="display:flex;border:1.5px solid var(--border);border-radius:10px;overflow:hidden;flex-shrink:0">
         <button @click="viewMode = 'bottle'" :style="viewMode === 'bottle' ? 'background:var(--sage);color:white' : 'background:white;color:var(--text-mid)'" style="border:none;border-radius:0;font-size:12px;padding:6px 12px;cursor:pointer">每瓶价</button>
@@ -672,8 +672,14 @@ const filteredOilNames = computed(() => {
   if (!searchQuery.value.trim()) return oils.oilNames
   const q = searchQuery.value.trim().toLowerCase()
   return oils.oilNames.filter(n => {
-    const en = getEnglishName(n).toLowerCase()
-    return n.toLowerCase().includes(q) || en.includes(q)
+    if (n.toLowerCase().includes(q)) return true
+    const card = getOilCard(n)
+    if (card?.en && card.en.toLowerCase().includes(q)) return true
+    const meta = oils.oilsMeta[n]
+    if (meta?.enName && meta.enName.toLowerCase().includes(q)) return true
+    const fallback = oilEn(n)
+    if (fallback && fallback.toLowerCase().includes(q)) return true
+    return false
   })
 })