fix: 稀释比例改回下拉框、全选toggle修复

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

frontend/src/views/RecipeManager.vue

@@ -215,12 +215,9 @@
           </div>
           <div class="ratio-row">
             <span class="ratio-label">参考比例 1:</span>
-            <div class="ratio-options">
-              <button v-for="n in [3,4,5,6,7,8,9,10,12,15,20]" :key="n"
-                class="ratio-btn" :class="{ active: formDilution === n }"
-                @click="formDilution = n"
-              >{{ n }}</button>
-            </div>
+            <select v-model.number="formDilution" class="select-sm">
+              <option v-for="n in [3,4,5,6,7,8,9,10,12,15,20]" :key="n" :value="n">{{ n }}</option>
+            </select>
             <span class="ratio-hint">纯精油约 {{ suggestedEoDrops }} 滴</span>
           </div>
         </div>
@@ -519,10 +516,8 @@ function onBatchSelect() {
 }
 
 function toggleSelectAllDiary() {
-  const allMySelected = myFilteredRecipes.value.length > 0 && selectedDiaryIds.size === myFilteredRecipes.value.length
-  const allPubSelected = auth.canEdit && publicFilteredRecipes.value.length > 0 && selectedIds.size === publicFilteredRecipes.value.length
-  if (allMySelected && (!auth.canEdit || allPubSelected)) {
-    // All selected → deselect all
+  if (selectedDiaryIds.size > 0 || selectedIds.size > 0) {
+    // Any selected → deselect all
     selectedDiaryIds.clear()
     selectedIds.clear()
   } else {