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/views/Inventory.vue

@@ -32,12 +32,13 @@
         </div>
       </div>
 
-      <!-- Pending plan -->
+      <!-- Pending plan: editable -->
       <div v-else-if="plansStore.pendingPlans.length" class="plan-section plan-pending">
         <div class="plan-header">
-          <span class="plan-title">⏳ 方案审核中</span>
+          <span class="plan-title">⏳ 老师正在为你定制方案中</span>
         </div>
-        <p class="plan-desc">{{ plansStore.pendingPlans[0].health_desc }}</p>
+        <textarea v-model="pendingDesc" class="form-textarea" rows="3" @blur="updatePendingDesc"></textarea>
+        <div class="plan-pending-hint">修改后老师会收到通知</div>
       </div>
 
       <!-- No plan: request button -->
@@ -324,6 +325,28 @@ function matchTeacher() {
   ) || null
 }
 
+const pendingDesc = ref('')
+
+// Sync pendingDesc when plans load
+watch(() => plansStore.pendingPlans, (pp) => {
+  if (pp.length) pendingDesc.value = pp[0].health_desc || ''
+}, { immediate: true })
+
+async function updatePendingDesc() {
+  const plan = plansStore.pendingPlans[0]
+  if (!plan || pendingDesc.value === plan.health_desc) return
+  try {
+    await api(`/api/oil-plans/${plan.id}`, {
+      method: 'PUT',
+      body: JSON.stringify({ health_desc: pendingDesc.value }),
+    })
+    plan.health_desc = pendingDesc.value
+    ui.showToast('已更新，老师会收到通知')
+  } catch {
+    ui.showToast('更新失败')
+  }
+}
+
 const shoppingTotal = computed(() =>
   plansStore.shoppingList.filter(i => !i.in_inventory).reduce((s, i) => s + i.total_cost, 0).toFixed(2)
 )
@@ -641,6 +664,7 @@ onMounted(async () => {
 .overlay-header h3 { margin: 0; font-size: 16px; }
 .form-label { display: block; font-size: 13px; color: #6b6375; margin-bottom: 4px; font-weight: 500; }
 .form-textarea { width: 100%; border: 1.5px solid #e5e4e7; border-radius: 8px; padding: 8px; font-size: 13px; font-family: inherit; resize: vertical; box-sizing: border-box; }
+.plan-pending-hint { font-size: 11px; color: #b0aab5; margin-top: 4px; }
 .teacher-matched { color: #2e7d5a; font-size: 13px; margin-top: 4px; font-weight: 500; }
 .teacher-no-match { color: #c62828; font-size: 12px; margin-top: 4px; }
 </style>