feat: 权限修复、搜索改进、滑动切换、通知badge

权限:
- viewer 不能编辑公共配方（前端+后端双重限制）
- viewer 管理配方页只显示"我的配方"
- 取消 token 链接登录，改为自注册+管理员分配角色
- 用户管理页去掉创建用户和复制链接，禁止设管理员
- 修复改权限 API 路径错误

搜索:
- 模糊匹配+同义词扩展（37组），精确/相似分层
- 精确匹配不搜精油成分（避免"西班牙牛至"污染）
- 所有搜索结果底部加"通知编辑添加"按钮

UI:
- 顶部 tab 栏按用户角色显示，切换时居中滚动
- 左右滑动按 visibleTabs 顺序切换 tab
- 用户名旁红色通知数 badge

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

frontend/src/views/RecipeManager.vue

@@ -1,7 +1,7 @@
 <template>
   <div class="recipe-manager">
     <!-- Review Bar (admin only) -->
-    <div v-if="auth.isAdmin && pendingCount > 0" class="review-bar" @click="showPending = !showPending">
+    <div v-if="auth.isAdmin && pendingCount > 0" class="review-bar" @click="showPending = !showPending" >
       📝 待审核配方: {{ pendingCount }} 条
       <span class="toggle-icon">{{ showPending ? '▾' : '▸' }}</span>
     </div>
@@ -14,37 +14,39 @@
       </div>
     </div>
 
-    <!-- Search & Actions Bar -->
-    <div class="manage-toolbar">
-      <div class="search-box">
-        <input
-          class="search-input"
-          v-model="manageSearch"
-          placeholder="搜索配方..."
-        />
-        <button v-if="manageSearch" class="search-clear-btn" @click="manageSearch = ''">✕</button>
+    <!-- Search & Actions Bar (editor+) -->
+    <template v-if="auth.canEdit">
+      <div class="manage-toolbar">
+        <div class="search-box">
+          <input
+            class="search-input"
+            v-model="manageSearch"
+            placeholder="搜索配方..."
+          />
+          <button v-if="manageSearch" class="search-clear-btn" @click="manageSearch = ''">✕</button>
+        </div>
+        <div class="toolbar-actions">
+          <button class="btn-outline btn-sm" @click="showAddOverlay = true">+ 添加配方</button>
+          <button class="btn-outline btn-sm" @click="exportExcel">📥 导出Excel</button>
+        </div>
       </div>
-      <div class="toolbar-actions">
-        <button class="btn-outline btn-sm" @click="showAddOverlay = true">+ 添加配方</button>
-        <button class="btn-outline btn-sm" @click="exportExcel">📥 导出Excel</button>
-      </div>
-    </div>
 
-    <!-- Tag Filter Bar -->
-    <div class="tag-filter-bar">
-      <button class="tag-toggle-btn" @click="showTagFilter = !showTagFilter">
-        🏷️ 标签筛选 {{ showTagFilter ? '▾' : '▸' }}
-      </button>
-      <div v-if="showTagFilter" class="tag-list">
-        <span
-          v-for="tag in recipeStore.allTags"
-          :key="tag"
-          class="tag-chip"
-          :class="{ active: selectedTags.includes(tag) }"
-          @click="toggleTag(tag)"
-        >{{ tag }}</span>
+      <!-- Tag Filter Bar -->
+      <div class="tag-filter-bar">
+        <button class="tag-toggle-btn" @click="showTagFilter = !showTagFilter">
+          🏷️ 标签筛选 {{ showTagFilter ? '▾' : '▸' }}
+        </button>
+        <div v-if="showTagFilter" class="tag-list">
+          <span
+            v-for="tag in recipeStore.allTags"
+            :key="tag"
+            class="tag-chip"
+            :class="{ active: selectedTags.includes(tag) }"
+            @click="toggleTag(tag)"
+          >{{ tag }}</span>
+        </div>
       </div>
-    </div>
+    </template>
 
     <!-- Batch Operations -->
     <div v-if="selectedIds.size > 0 || selectedDiaryIds.size > 0" class="batch-bar">
@@ -92,8 +94,8 @@
       </div>
     </div>
 
-    <!-- Public Recipes Section -->
-    <div class="recipe-section">
+    <!-- Public Recipes Section (editor+) -->
+    <div v-if="auth.canEdit" class="recipe-section">
       <h3 class="section-title">🌿 公共配方库 ({{ publicRecipes.length }})</h3>
       <div class="recipe-list">
         <div