fix: 字号恢复正常大小、下架改用api.post、翻译编辑器预填充

精油价目:
- 字号恢复固定大小(14/10/13/11px)，手机端@media缩小
- 不再用clamp()（之前太小）
- 下架改用 api.post 替代 api() raw fetch，更可靠
- 稀释比例/使用禁忌卡片: emoji和标题合并为一行(flex row)

翻译同步:
- 打开翻译编辑器时预填充: 读取 oilsMeta.enName → oilEn() → 填入输入框
- 用户看到当前英文名，修改后保存到 oils.en_name
- 精油价目页 getEnglishName 读同一字段，自动同步

翻译表:
- 补充 舒缓→Deep Blue 等常用精油英文名
- oilEn() 支持去掉/添加"复方"后缀匹配

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

frontend/src/components/RecipeDetailOverlay.vue

@@ -103,7 +103,7 @@
           <button
             v-if="cardLang === 'en' && authStore.canManage"
             class="action-btn"
-            @click="showTranslationEditor = true"
+            @click="openTranslationEditor"
           >✏️ 修改翻译</button>
           <button
             v-if="showBrandHint"
@@ -595,6 +595,18 @@ function copyText() {
   })
 }
 
+function openTranslationEditor() {
+  // Pre-populate with existing English names from DB/translation table
+  const map = {}
+  for (const ing of cardIngredients.value) {
+    const existing = oilsStore.oilsMeta[ing.oil]?.enName || oilEn(ing.oil)
+    if (existing) map[ing.oil] = existing
+  }
+  customOilNameEn.value = map
+  customRecipeNameEn.value = recipe.value.en_name || recipeNameEn(recipe.value.name)
+  showTranslationEditor.value = true
+}
+
 async function applyTranslation() {
   showTranslationEditor.value = false
   let saved = 0