diff --git a/frontend/src/__tests__/polishFeatures.test.js b/frontend/src/__tests__/polishFeatures.test.js
new file mode 100644
index 0000000..05e4a04
--- /dev/null
+++ b/frontend/src/__tests__/polishFeatures.test.js
@@ -0,0 +1,126 @@
+import { describe, it, expect } from 'vitest'
+import { EDITOR_ONLY_TAGS } from '../stores/recipes'
+
+// ---------------------------------------------------------------------------
+// Tag sorting
+// ---------------------------------------------------------------------------
+describe('Tag sorting', () => {
+  it('sorts tags alphabetically with localeCompare zh', () => {
+    const tags = ['香水', '呼吸', '消化', '美容']
+    const sorted = [...tags].sort((a, b) => a.localeCompare(b, 'zh'))
+    expect(sorted[0]).toBe('呼吸')
+    // All sorted
+    for (let i = 1; i < sorted.length; i++) {
+      expect(sorted[i - 1].localeCompare(sorted[i], 'zh')).toBeLessThanOrEqual(0)
+    }
+  })
+
+  it('EDITOR_ONLY_TAGS filters correctly', () => {
+    const allTags = ['呼吸', '已审核', '消化', '香水']
+    const visible = allTags.filter(t => !EDITOR_ONLY_TAGS.includes(t))
+    expect(visible).not.toContain('已审核')
+    expect(visible).toContain('呼吸')
+    expect(visible).toHaveLength(3)
+  })
+})
+
+// ---------------------------------------------------------------------------
+// Recipe save data format
+// ---------------------------------------------------------------------------
+describe('Recipe data format', () => {
+  it('oil_name format overwrites oil format when spread', () => {
+    // This test documents the bug that was fixed
+    const localRecipe = {
+      ingredients: [{ oil: '薰衣草', drops: 3 }],
+    }
+    const payload = {
+      ingredients: [{ oil_name: '薰衣草', drops: 3 }],
+    }
+    const merged = { ...localRecipe, ...payload }
+    // After merge, ingredients have oil_name not oil — this was the bug
+    expect(merged.ingredients[0]).toHaveProperty('oil_name')
+    expect(merged.ingredients[0]).not.toHaveProperty('oil')
+  })
+
+  it('loadRecipes mapping converts oil_name to oil', () => {
+    // Simulate what loadRecipes does
+    const apiData = [
+      { id: 1, name: 'test', ingredients: [{ oil_name: '薰衣草', drops: 3 }], tags: [] }
+    ]
+    const mapped = apiData.map(r => ({
+      ...r,
+      ingredients: r.ingredients.map(ing => ({
+        oil: ing.oil_name ?? ing.oil,
+        drops: ing.drops,
+      }))
+    }))
+    expect(mapped[0].ingredients[0].oil).toBe('薰衣草')
+    expect(mapped[0].ingredients[0]).not.toHaveProperty('oil_name')
+  })
+})
+
+// ---------------------------------------------------------------------------
+// Volume detection from ingredients
+// ---------------------------------------------------------------------------
+describe('Volume detection', () => {
+  const DROPS_PER_ML = 18.6
+
+  function guessVolume(eoDrops, cocoDrops) {
+    const totalDrops = eoDrops + cocoDrops
+    const ml = totalDrops / DROPS_PER_ML
+    if (ml <= 2) return 'single'
+    if (Math.abs(ml - 5) < 1.5) return '5'
+    if (Math.abs(ml - 10) < 2.5) return '10'
+    if (Math.abs(ml - 15) < 2.5) return '15'
+    if (Math.abs(ml - 20) < 3) return '20'
+    if (Math.abs(ml - 30) < 6) return '30'
+    return 'custom'
+  }
+
+  it('detects single use (small amounts)', () => {
+    expect(guessVolume(5, 10)).toBe('single')
+  })
+
+  it('detects 5ml', () => {
+    expect(guessVolume(15, Math.round(5 * DROPS_PER_ML) - 15)).toBe('5')
+  })
+
+  it('detects 10ml', () => {
+    expect(guessVolume(20, Math.round(10 * DROPS_PER_ML) - 20)).toBe('10')
+  })
+
+  it('detects 30ml', () => {
+    expect(guessVolume(50, Math.round(30 * DROPS_PER_ML) - 50)).toBe('30')
+  })
+
+  it('no coconut returns no volume', () => {
+    // When cocoDrops is 0, function still returns based on total
+    // But in real code, no coconut → formVolume = ''
+    expect(guessVolume(10, 0)).toBe('single')
+  })
+
+  it('detects custom for large volumes', () => {
+    expect(guessVolume(100, 1000)).toBe('custom')
+  })
+})
+
+// ---------------------------------------------------------------------------
+// Dilution ratio calculation
+// ---------------------------------------------------------------------------
+describe('Dilution ratio', () => {
+  it('calculates ratio correctly', () => {
+    expect(Math.round(60 / 10)).toBe(6) // 1:6
+    expect(Math.round(30 / 10)).toBe(3) // 1:3
+    expect(Math.round(100 / 10)).toBe(10) // 1:10
+  })
+
+  it('snaps to nearest option', () => {
+    const options = [3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 20]
+    const snap = (ratio) => options.reduce((a, b) => Math.abs(b - ratio) < Math.abs(a - ratio) ? b : a)
+    expect(snap(6)).toBe(6)
+    expect([10, 12]).toContain(snap(11)) // equidistant
+    expect(snap(13)).toBe(12)
+    expect([12, 15]).toContain(snap(14))
+    expect(snap(18)).toBe(20)
+  })
+})
diff --git a/frontend/src/components/RecipeCard.vue b/frontend/src/components/RecipeCard.vue
index 3e8b1de..5471295 100644
--- a/frontend/src/components/RecipeCard.vue
+++ b/frontend/src/components/RecipeCard.vue
@@ -36,8 +36,8 @@ const auth = useAuthStore()
 
 const visibleTags = computed(() => {
   if (!props.recipe.tags) return []
-  if (auth.canEdit) return props.recipe.tags
-  return props.recipe.tags.filter(t => !EDITOR_ONLY_TAGS.includes(t))
+  const tags = auth.canEdit ? [...props.recipe.tags] : props.recipe.tags.filter(t => !EDITOR_ONLY_TAGS.includes(t))
+  return tags.sort((a, b) => a.localeCompare(b, 'zh'))
 })
 
 const oilNames = computed(() =>
diff --git a/frontend/src/stores/recipes.js b/frontend/src/stores/recipes.js
index 8e6f736..76729fe 100644
--- a/frontend/src/stores/recipes.js
+++ b/frontend/src/stores/recipes.js
@@ -48,10 +48,8 @@ export const useRecipesStore = defineStore('recipes', () => {
   async function saveRecipe(recipe) {
     if (recipe._id) {
       const data = await api.put(`/api/recipes/${recipe._id}`, recipe)
-      const idx = recipes.value.findIndex((r) => r._id === recipe._id)
-      if (idx !== -1) {
-        recipes.value[idx] = { ...recipes.value[idx], ...recipe, _version: data._version ?? data.version ?? recipe._version }
-      }
+      // Reload from server to get properly formatted data (oil_name → oil mapping)
+      await loadRecipes()
       return data
     } else {
       const data = await api.post('/api/recipes', recipe)
diff --git a/frontend/src/views/RecipeManager.vue b/frontend/src/views/RecipeManager.vue
index 531c098..d28c917 100644
--- a/frontend/src/views/RecipeManager.vue
+++ b/frontend/src/views/RecipeManager.vue
@@ -42,7 +42,7 @@
       <button class="action-chip" :class="{ active: isAllSelected }" @click="toggleSelectAll">
         全选<span v-if="totalSelected > 0" class="chip-count">{{ totalSelected }}</span>
       </button>
-      <button class="action-chip" :class="{ active: showTagFilter }" @click="showTagFilter = !showTagFilter">标签</button>
+      <button class="action-chip" :class="{ active: showTagFilter }" @click="toggleTagFilter">标签</button>
       <button v-if="totalSelected > 0" class="action-chip" :class="{ active: showBatchMenu }" @click="showBatchMenu = !showBatchMenu">批量</button>
       <button v-if="totalSelected > 0" class="action-chip cancel" @click="clearSelection">取消</button>
       <button v-if="auth.isAdmin" class="export-btn" @click="exportExcel" title="导出Excel">📥</button>
@@ -317,8 +317,8 @@
           <button class="add-row-btn" @click="addOilRow">+ 添加精油</button>
         </div>
 
-        <!-- Real-time summary -->
-        <div class="recipe-summary">
+        <!-- Real-time summary (only when volume selected) -->
+        <div v-if="formVolume" class="recipe-summary">
           {{ recipeSummaryText }}
         </div>
 
@@ -443,7 +443,13 @@ const formCustomVolume = ref(null)
 const formCustomUnit = ref('drops')
 const formDilution = ref(6)
 
-const formCocoRow = ref({ oil: '椰子油', drops: 10, _search: '椰子油', _open: false })
+const formCocoRow = ref(null)
+
+watch(() => formVolume.value, (vol) => {
+  if (vol && !formCocoRow.value) {
+    formCocoRow.value = { oil: '椰子油', drops: vol === 'single' ? 10 : 0, _search: '椰子油', _open: false }
+  }
+})
 
 // EO ingredients (everything except coconut)
 const formEoIngredients = computed(() =>
@@ -562,6 +568,15 @@ async function deleteGlobalTag(tag) {
   }
 }
 
+function toggleTagFilter() {
+  if (showTagFilter.value) {
+    showTagFilter.value = false
+    selectedTags.value = []
+  } else {
+    showTagFilter.value = true
+  }
+}
+
 function toggleTag(tag) {
   const idx = selectedTags.value.indexOf(tag)
   if (idx >= 0) selectedTags.value.splice(idx, 1)
@@ -749,10 +764,31 @@ function editRecipe(recipe) {
   const ings = recipe.ingredients || []
   formIngredients.value = ings.filter(i => i.oil !== '椰子油').map(i => ({ ...i, _search: i.oil, _open: false }))
   const coco = ings.find(i => i.oil === '椰子油')
-  formCocoRow.value = coco ? { ...coco, _search: '椰子油', _open: false } : { oil: '椰子油', drops: 10, _search: '椰子油', _open: false }
+  if (coco) {
+    formCocoRow.value = { ...coco, _search: '椰子油', _open: false }
+    // Guess volume from total drops
+    const eoDrops = ings.filter(i => i.oil && i.oil !== '椰子油').reduce((s, i) => s + (i.drops || 0), 0)
+    const totalDrops = eoDrops + coco.drops
+    const ml = totalDrops / DROPS_PER_ML
+    if (ml <= 2) formVolume.value = 'single'
+    else if (Math.abs(ml - 5) < 1.5) formVolume.value = '5'
+    else if (Math.abs(ml - 10) < 2.5) formVolume.value = '10'
+    else if (Math.abs(ml - 15) < 2.5) formVolume.value = '15'
+    else if (Math.abs(ml - 20) < 3) formVolume.value = '20'
+    else if (Math.abs(ml - 30) < 6) formVolume.value = '30'
+    else { formVolume.value = 'custom'; formCustomVolume.value = Math.round(ml) }
+    // Guess dilution
+    if (eoDrops > 0 && coco.drops > 0) {
+      const ratio = Math.round(coco.drops / eoDrops)
+      const options = [3,4,5,6,7,8,9,10,12,15,20]
+      formDilution.value = options.reduce((a, b) => Math.abs(b - ratio) < Math.abs(a - ratio) ? b : a)
+    }
+  } else {
+    formCocoRow.value = null
+    formVolume.value = ''
+  }
   formNote.value = recipe.note || ''
   formTags.value = [...(recipe.tags || [])]
-  calcDilutionFromIngs(recipe.ingredients)
   showAddOverlay.value = true
 }
 
@@ -765,7 +801,7 @@ function closeOverlay() {
 function resetForm() {
   formName.value = ''
   formIngredients.value = [{ oil: '', drops: 1, _search: '', _open: false }]
-  formCocoRow.value = { oil: '椰子油', drops: 10, _search: '椰子油', _open: false }
+  formCocoRow.value = null
   formNote.value = ''
   formTags.value = []
   smartPasteText.value = ''
@@ -1218,10 +1254,29 @@ function editDiaryRecipe(diary) {
   const ings = diary.ingredients || []
   formIngredients.value = ings.filter(i => i.oil !== '椰子油').map(i => ({ ...i, _search: i.oil, _open: false }))
   const coco = ings.find(i => i.oil === '椰子油')
-  formCocoRow.value = coco ? { ...coco, _search: '椰子油', _open: false } : { oil: '椰子油', drops: 10, _search: '椰子油', _open: false }
+  if (coco) {
+    formCocoRow.value = { ...coco, _search: '椰子油', _open: false }
+    const eoDrops = ings.filter(i => i.oil && i.oil !== '椰子油').reduce((s, i) => s + (i.drops || 0), 0)
+    const totalDrops = eoDrops + coco.drops
+    const ml = totalDrops / DROPS_PER_ML
+    if (ml <= 2) formVolume.value = 'single'
+    else if (Math.abs(ml - 5) < 1.5) formVolume.value = '5'
+    else if (Math.abs(ml - 10) < 2.5) formVolume.value = '10'
+    else if (Math.abs(ml - 15) < 2.5) formVolume.value = '15'
+    else if (Math.abs(ml - 20) < 3) formVolume.value = '20'
+    else if (Math.abs(ml - 30) < 6) formVolume.value = '30'
+    else { formVolume.value = 'custom'; formCustomVolume.value = Math.round(ml) }
+    if (eoDrops > 0 && coco.drops > 0) {
+      const ratio = Math.round(coco.drops / eoDrops)
+      const options = [3,4,5,6,7,8,9,10,12,15,20]
+      formDilution.value = options.reduce((a, b) => Math.abs(b - ratio) < Math.abs(a - ratio) ? b : a)
+    }
+  } else {
+    formCocoRow.value = null
+    formVolume.value = ''
+  }
   formNote.value = diary.note || ''
   formTags.value = [...(diary.tags || [])]
-  calcDilutionFromIngs(diary.ingredients)
   showAddOverlay.value = true
 }