fix: 配方成分显示和导出使用动态单位，重复提示改为"修改用量"

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

frontend/src/views/RecipeManager.vue

@@ -872,7 +872,7 @@ function selectOil(ing, name) {
   // Check for duplicate oil in current recipe
   const existing = formIngredients.value.find(i => i !== ing && i.oil === name)
   if (existing) {
-    ui.showToast(`已有「${name}」，请直接修改滴数`)
+    ui.showToast(`已有「${name}」，请直接修改用量`)
     ing._open = false
     return
   }
@@ -1568,7 +1568,7 @@ function recipesIdentical(a, b) {
 }
 
 function formatIngsCompare(ings) {
-  return (ings || []).map(i => `${i.oil} ${i.drops}滴`).join('、')
+  return (ings || []).map(i => `${i.oil} ${i.drops}${oils.unitLabel(i.oil)}`).join('、')
 }
 
 async function approveRecipe(recipe) {
@@ -1650,7 +1650,7 @@ async function exportExcel() {
     return list.map(r => ({
       '配方名称': r.name,
       '标签': (r.tags || []).join('/'),
-      '精油成分': r.ingredients.map(i => `${i.oil}${i.drops}滴`).join('、'),
+      '精油成分': r.ingredients.map(i => `${i.oil}${i.drops}${oils.unitLabel(i.oil)}`).join('、'),
       '成本': oils.fmtPrice(oils.calcCost(r.ingredients)),
       '备注': r.note || '',
     }))