fix: 导出CSV前端生成 + 新标签输入框缩小

- 导出改为前端直接生成CSV，不依赖后端API
- 新标签输入框缩短到80px

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

frontend/src/views/RecipeManager.vue

@@ -1109,21 +1109,26 @@ async function rejectRecipe(recipe) {
   }
 }
 
-async function exportExcel() {
-  try {
-    const res = await api('/api/recipes/export-excel')
-    if (!res.ok) throw new Error('Export failed')
-    const blob = await res.blob()
-    const url = URL.createObjectURL(blob)
-    const a = document.createElement('a')
-    a.href = url
-    a.download = '配方导出.xlsx'
-    a.click()
-    URL.revokeObjectURL(url)
-    ui.showToast('导出成功')
-  } catch {
-    ui.showToast('导出失败')
+function exportExcel() {
+  const recipes = recipeStore.recipes
+  if (!recipes.length) { ui.showToast('没有配方可导出'); return }
+  // BOM for UTF-8 Excel compatibility
+  let csv = '\uFEFF配方名称,标签,精油成分,滴数,成本\n'
+  for (const r of recipes) {
+    const tags = (r.tags || []).join('/')
+    const ings = r.ingredients.map(i => i.oil).join('、')
+    const drops = r.ingredients.map(i => `${i.oil}${i.drops}滴`).join('、')
+    const cost = oils.fmtPrice(oils.calcCost(r.ingredients))
+    csv += `"${r.name}","${tags}","${ings}","${drops}","${cost}"\n`
   }
+  const blob = new Blob([csv], { type: 'text/csv;charset=utf-8' })
+  const url = URL.createObjectURL(blob)
+  const a = document.createElement('a')
+  a.href = url
+  a.download = '配方导出.csv'
+  a.click()
+  URL.revokeObjectURL(url)
+  ui.showToast('导出成功')
 }
 
 function onTagPickerSave(tags) {
@@ -1598,8 +1603,8 @@ watch(() => recipeStore.recipes, () => {
 }
 .tag-delete { margin-left: 4px; cursor: pointer; font-size: 12px; color: #ccc; }
 .tag-delete:hover { color: #c0392b; }
-.tag-add-row { display: flex; gap: 4px; align-items: center; width: 100%; margin-top: 4px; }
-.tag-add-input { flex: 1; padding: 4px 8px; border: 1px solid #e5e4e7; border-radius: 8px; font-size: 12px; outline: none; font-family: inherit; }
+.tag-add-row { display: inline-flex; gap: 4px; align-items: center; }
+.tag-add-input { width: 80px; padding: 4px 8px; border: 1px solid #e5e4e7; border-radius: 8px; font-size: 12px; outline: none; font-family: inherit; }
 .tag-add-input:focus { border-color: #7ec6a4; }
 .tag-add-btn { border: none; background: #e8f5e9; color: #4a9d7e; border-radius: 6px; padding: 4px 10px; font-size: 12px; cursor: pointer; font-family: inherit; }
 .tag-add-btn:disabled { opacity: 0.4; }