feat:實作評價系統 — 匿名評價、有幫助投票、手動完成預約

後端：
- 新增 reviews / review_edits / review_votes migration（含索引）
- Review / ReviewEdit / ReviewVote Model
- ReviewController：評價 CRUD、資格驗證（completed booking）、rating 即時重算
- toggleHelpful：Member 限定、GREATEST 原子防負、DB transaction 同步
- AdminReviewController：全量列表、刪除（含重算）
- AdminBookingController：全量列表、手動標記 completed
- ProviderBookingController 新增 complete 方法（教練手動完成預約）
- DevelopmentSeeder：快速重建測試資料（admin/coach/member + offers + bookings）
- EnsureAdmin middleware 正式納入 bootstrap/app.php
- Nginx server_name 加入 cfdive.local

前端：
- 課程詳情頁加入評價區塊（星等分布、排序切換、撰寫/修改/刪除、有幫助 Toggle）
- Coach Portal 新增「課程評價」頁（只讀，依課程分組）
- Coach 預約管理加入「完成」按鈕
- Admin 新增「預約管理」頁（標記完成）、「評價管理」頁（刪除）
- Admin / Coach Navbar 新增對應連結

OpenSpec：
- review-system change 歸檔至 archive/2026-05-12-review-system
- 新增 specs/review-lifecycle 與 specs/review-voting 主規格
- review-voting spec 補充 Member 限定與 GREATEST 原子更新說明

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

frontend/src/views/coach/BookingManagerView.vue

@@ -1,6 +1,6 @@
 <script setup>
 import { ref, onMounted, computed } from 'vue'
-import { getProviderBookings, confirmBooking, rejectBooking, cancelBooking } from '../../api/coachBookingApi'
+import { getProviderBookings, confirmBooking, rejectBooking, cancelBooking, completeBooking } from '../../api/coachBookingApi'
 
 const bookings = ref([])
 const loading  = ref(true)
@@ -48,9 +48,10 @@ async function doAction(booking, action) {
   const labels = { confirm: '確認', reject: '拒絕', cancel: '取消' }
   if (!confirm(`確定要${labels[action]}此預約？`)) return
   try {
-    if (action === 'confirm') await confirmBooking(booking.id)
-    if (action === 'reject')  await rejectBooking(booking.id)
-    if (action === 'cancel')  await cancelBooking(booking.id)
+    if (action === 'confirm')  await confirmBooking(booking.id)
+    if (action === 'reject')   await rejectBooking(booking.id)
+    if (action === 'cancel')   await cancelBooking(booking.id)
+    if (action === 'complete') await completeBooking(booking.id)
     await fetchBookings()
   } catch (e) {
     alert(e.response?.data?.message || '操作失敗')
@@ -115,6 +116,10 @@ async function doAction(booking, action) {
                   class="text-xs bg-red-500 hover:bg-red-400 text-white px-3 py-1 rounded-full transition">
                   拒絕
                 </button>
+                <button v-if="b.status === 'confirmed'" @click="doAction(b, 'complete')"
+                  class="text-xs bg-blue-600 hover:bg-blue-500 text-white px-3 py-1 rounded-full transition">
+                  完成
+                </button>
                 <button v-if="b.status === 'confirmed'" @click="doAction(b, 'cancel')"
                   class="text-xs text-orange-500 hover:text-orange-700 underline">
                   取消