feat: 方案待定制可编辑+通知去定制按钮+权限修复

- 会员等待中可修改健康需求，修改后通知老师
- 通知里方案请求显示"去定制"按钮跳转用户管理
- 后端: 方案owner可更新health_desc，teacher可改title/status

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

frontend/src/components/UserMenu.vue

@@ -38,6 +38,8 @@
               <div v-if="!n.is_read" class="notif-actions">
                 <!-- 搜索未收录通知：已添加按钮 -->
                 <button v-if="isSearchMissing(n)" class="notif-action-btn notif-btn-added" @click="markAdded(n)">已添加</button>
+                <!-- 方案请求通知：去定制按钮 -->
+                <button v-else-if="isPlanRequest(n)" class="notif-action-btn notif-btn-plan" @click="goPlanDesign(n)">去定制</button>
                 <!-- 审核类通知：去审核按钮 -->
                 <button v-else-if="isReviewable(n)" class="notif-action-btn notif-btn-review" @click="goReview(n)">去审核</button>
                 <!-- 默认：已读按钮 -->
@@ -129,6 +131,16 @@ function isSearchMissing(n) {
   return n.title && n.title.includes('用户需求')
 }
 
+function isPlanRequest(n) {
+  return n.title && (n.title.includes('方案请求') || n.title.includes('方案需求'))
+}
+
+function goPlanDesign(n) {
+  markOneRead(n)
+  emit('close')
+  window.location.hash = '#/users'
+}
+
 function isReviewable(n) {
   if (!n.title) return false
   // Admin: review recipe/business/applications
@@ -269,6 +281,8 @@ onMounted(loadNotifications)
 }
 .notif-btn-added { color: #4a9d7e; border-color: #7ec6a4; }
 .notif-btn-added:hover { background: #e8f5e9; }
+.notif-btn-plan { color: #1565c0; border-color: #90caf9; }
+.notif-btn-plan:hover { background: #e3f2fd; }
 .notif-btn-review { color: #e65100; border-color: #ffb74d; }
 .notif-btn-review:hover { background: #fff3e0; }
 .notif-body { color: #888; font-size: 12px; margin-top: 2px; white-space: pre-line; }