fix: 老师选择改为精确输入匹配，不暴露老师列表

输入老师的 display_name 或 username 精确匹配才能发送请求。

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

frontend/src/views/Inventory.vue

@@ -56,15 +56,17 @@
             <label class="form-label">描述你的健康需求</label>
             <textarea v-model="planHealthDesc" class="form-textarea" rows="4"
               placeholder="例如：家里有老人膝盖痛，小孩经常感冒咳嗽，我自己想改善睡眠..."></textarea>
-            <label class="form-label" style="margin-top:12px">选择老师</label>
-            <select v-model="planTeacherId" class="form-select">
-              <option value="">请选择</option>
-              <option v-for="t in plansStore.teachers" :key="t.id" :value="t.id">
-                {{ t.display_name }}
-              </option>
-            </select>
+            <label class="form-label" style="margin-top:12px">输入老师的名字</label>
+            <input v-model="planTeacherName" class="form-input" placeholder="请输入老师告诉你的名字"
+              @input="matchTeacher" />
+            <div v-if="matchedTeacher" class="teacher-matched">
+              已匹配：{{ matchedTeacher.display_name }}
+            </div>
+            <div v-else-if="planTeacherName.trim() && !matchedTeacher" class="teacher-no-match">
+              未找到该老师，请确认名字是否正确
+            </div>
             <button class="btn-primary" style="width:100%;margin-top:16px"
-              :disabled="!planHealthDesc.trim() || !planTeacherId"
+              :disabled="!planHealthDesc.trim() || !matchedTeacher"
               @click="submitPlanRequest">
               发送请求
             </button>
@@ -311,7 +313,16 @@ async function toggleOil(name) {
 // Plan request
 const showPlanRequest = ref(false)
 const planHealthDesc = ref('')
-const planTeacherId = ref('')
+const planTeacherName = ref('')
+const matchedTeacher = ref(null)
+
+function matchTeacher() {
+  const name = planTeacherName.value.trim()
+  if (!name) { matchedTeacher.value = null; return }
+  matchedTeacher.value = plansStore.teachers.find(t =>
+    t.display_name === name || t.username === name
+  ) || null
+}
 
 const shoppingTotal = computed(() =>
   plansStore.shoppingList.filter(i => !i.in_inventory).reduce((s, i) => s + i.total_cost, 0).toFixed(2)
@@ -319,10 +330,11 @@ const shoppingTotal = computed(() =>
 
 async function submitPlanRequest() {
   try {
-    await plansStore.createPlan(planHealthDesc.value, planTeacherId.value)
+    await plansStore.createPlan(planHealthDesc.value, matchedTeacher.value.id)
     showPlanRequest.value = false
     planHealthDesc.value = ''
-    planTeacherId.value = ''
+    planTeacherName.value = ''
+    matchedTeacher.value = null
     ui.showToast('已发送方案请求')
   } catch {
     ui.showToast('发送失败')
@@ -629,5 +641,6 @@ 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; }
-.form-select { width: 100%; border: 1.5px solid #e5e4e7; border-radius: 8px; padding: 8px; font-size: 13px; font-family: inherit; box-sizing: border-box; }
+.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>