feat: 通用单位系统 — drop/ml/g/capsule，去掉硬编码

unit字段支持4种值，所有显示自动适配：
- drop: 精油(滴/drop)
- ml: 液体产品(ml)
- g: 膏霜产品(g)
- capsule: 胶囊(颗/capsule)
新增产品选单位即可，无需改代码。

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

frontend/src/stores/oils.js

@@ -94,25 +94,39 @@ export const useOilsStore = defineStore('oils', () => {
     delete oilsMeta.value[name]
   }
 
-  function isMlUnit(name) {
+  const UNIT_LABELS = {
+    drop: { zh: '滴', en: 'drop', enPlural: 'drops' },
+    ml: { zh: 'ml', en: 'ml', enPlural: 'ml' },
+    g: { zh: 'g', en: 'g', enPlural: 'g' },
+    capsule: { zh: '颗', en: 'capsule', enPlural: 'capsules' },
+  }
+
+  function getUnit(name) {
     const meta = oilsMeta.value[name]
-    return meta && meta.unit === 'ml'
+    return (meta && meta.unit) || 'drop'
+  }
+
+  function isDropUnit(name) {
+    return getUnit(name) === 'drop'
+  }
+
+  function isMlUnit(name) {
+    return getUnit(name) === 'ml'
   }
 
   function isPortionUnit(name) {
-    return isMlUnit(name)
+    return !isDropUnit(name)
   }
 
   function unitLabel(name, lang = 'zh') {
-    if (isMlUnit(name)) return 'ml'
+    const u = UNIT_LABELS[getUnit(name)] || UNIT_LABELS.drop
-    if (name === '植物空胶囊') return lang === 'en' ? 'capsule' : '颗'
+    return lang === 'en' ? u.en : u.zh
-    return lang === 'en' ? 'drop' : '滴'
   }
 
   function unitLabelPlural(name, count, lang = 'zh') {
-    if (isMlUnit(name)) return 'ml'
+    const u = UNIT_LABELS[getUnit(name)] || UNIT_LABELS.drop
-    if (name === '植物空胶囊') return lang === 'en' ? (count === 1 ? 'capsule' : 'capsules') : '颗'
+    if (lang === 'en') return count === 1 ? u.en : u.enPlural
-    return lang === 'en' ? (count === 1 ? 'drop' : 'drops') : '滴'
+    return u.zh
   }
 
   return {
@@ -127,6 +141,8 @@ export const useOilsStore = defineStore('oils', () => {
     loadOils,
     saveOil,
     deleteOil,
+    getUnit,
+    isDropUnit,
     isMlUnit,
     isPortionUnit,
     unitLabel,

frontend/src/views/OilReference.vue

@@ -227,7 +227,7 @@
         </div>
         <div class="detail-body">
           <!-- 精油（非ml产品） -->
-          <template v-if="!oils.isMlUnit(selectedOilName)">
+          <template v-if="oils.isDropUnit(selectedOilName)">
             <div class="detail-row">
               <span class="detail-label">总容量</span>
               <span class="detail-value">{{ volumeWithDrops(selectedOilName) }}</span>
@@ -253,19 +253,27 @@
           <template v-else>
             <div class="detail-row">
               <span class="detail-label">总容量</span>
-              <span class="detail-value">{{ getMeta(selectedOilName)?.dropCount || '--' }}ml</span>
+              <span class="detail-value">{{ getMeta(selectedOilName)?.dropCount || '--' }}{{ oils.unitLabel(selectedOilName) }}</span>
             </div>
             <div class="detail-row">
               <span class="detail-label">会员价</span>
               <span class="detail-value">{{ getMeta(selectedOilName)?.bottlePrice != null ? ('¥ ' + getMeta(selectedOilName).bottlePrice.toFixed(2)) : '--' }}</span>
             </div>
             <div class="detail-row">
-              <span class="detail-label">每ml价格</span>
+              <span class="detail-label">每{{ oils.unitLabel(selectedOilName) }}价格</span>
               <span class="detail-value">{{ oils.pricePerDrop(selectedOilName) ? ('¥ ' + oils.pricePerDrop(selectedOilName).toFixed(2)) : '--' }}</span>
             </div>
+            <div class="detail-row" v-if="getMeta(selectedOilName)?.retailPrice">
+              <span class="detail-label">零售价</span>
+              <span class="detail-value">¥ {{ getMeta(selectedOilName).retailPrice.toFixed(2) }}</span>
+            </div>
+            <div class="detail-row" v-if="getMeta(selectedOilName)?.retailPrice && getMeta(selectedOilName)?.dropCount">
+              <span class="detail-label">每{{ oils.unitLabel(selectedOilName) }}价格</span>
+              <span class="detail-value">¥ {{ (getMeta(selectedOilName).retailPrice / getMeta(selectedOilName).dropCount).toFixed(2) }}</span>
+            </div>
           </template>
 
-          <h4 style="margin:16px 0 8px">含此{{ oils.isMlUnit(selectedOilName) ? '产品' : '精油' }}的配方</h4>
+          <h4 style="margin:16px 0 8px">含此{{ oils.isDropUnit(selectedOilName) ? '精油' : '产品' }}的配方</h4>
           <div v-if="recipesWithOil.length" class="detail-recipes">
             <div v-for="r in recipesWithOil" :key="r._id" class="detail-recipe-item">
               <span class="dr-name">{{ r.name }}</span>
@@ -490,27 +498,24 @@ for (const [ml, drops] of Object.entries(VOLUME_OPTIONS)) {
   DROPS_TO_VOLUME[drops] = ml + 'ml'
 }
 
-function volumeWithDrops(name) {
-  const meta = getMeta(name)
-  if (!meta || !meta.dropCount) return '--'
-  if (name === '植物空胶囊') return meta.dropCount + '颗'
-  const ml = DROPS_TO_VOLUME[meta.dropCount]
-  if (ml) return `${ml}/${meta.dropCount}滴`
-  return meta.dropCount + '滴'
-}
-
 function oilPriceUnit(name) {
-  if (oils.isMlUnit(name)) return 'ml'
+  return oils.unitLabel(name)
-  if (name === '植物空胶囊') return '颗'
-  return '滴'
 }
 
 function volumeLabel(dropCount, name) {
-  if (dropCount === 160) return '160颗'
+  if (!oils.isDropUnit(name)) return dropCount + oils.unitLabel(name)
-  if (oils.isMlUnit(name)) return dropCount + 'ml'
   return DROPS_TO_VOLUME[dropCount] || (dropCount + '滴')
 }
 
+function volumeWithDrops(name) {
+  const meta = getMeta(name)
+  if (!meta || !meta.dropCount) return '--'
+  if (!oils.isDropUnit(name)) return meta.dropCount + oils.unitLabel(name)
+  const ml = DROPS_TO_VOLUME[meta.dropCount]
+  if (ml) return `${ml}/${meta.dropCount}滴`
+  return meta.dropCount + '滴'
+}
+
 function chipStyle(name) {
   const hasCard = !!getOilCard(name)
   if (hasCard) return 'cursor:pointer;border-left:3px solid var(--sage);background:linear-gradient(90deg,var(--sage-mist),white)'