feat(admin): implement full day-by-day schedule editor with live preview

## Features

### Admin Schedule Page (`packages/app/src/pages/admin/schedule.vue`)
- Interactive date-based slot editor for managing daily schedules
- Real-time slot editing: start/end times, capacity adjustments
- Slot deletion with conflict warnings when bookings exist
- Add new slots with modal dialog
- Live booking status display (booked count, people names)
- Publish/Save changes with sync feedback
- Revert unsaved changes with confirmation
- Skeleton loading states and empty state handling
- Responsive design with optimized mobile UX

### Backend Enhancements
- **New DTO** (`PublishDaySlotsDto`): Structured slot publishing with validation
  - Date string validation
  - Slot array with existing slot IDs for updates
  - Time and capacity validation per slot

- **Schedule Preview API** (`getSchedulePreview`):
  - Check for existing published slots
  - Fallback to active WeekTemplates for unpublished dates
  - Unified response format with isPublished flag

- **Publish Slots API** (`publishDaySlots`):
  - Atomic transaction for consistency
  - Update existing slots with new times/capacity
  - Create new slots from template data
  - Delete unpublished slots or set to CLOSED if bookings exist
  - Prevent capacity reduction below existing bookings
  - Returns all published slots for feedback

### State Management
- Enhanced admin store with schedule state
- Support for pending/unsaved slot changes
- Optimistic UI updates with server sync

### Documentation
- Comprehensive scheduling system architecture docs
- Quick reference for admin workflows
- Flow diagrams and state transitions
- Implementation guide for future maintenance

## Breaking Changes
None

## Testing Recommendations
- Create slots for future dates via schedule editor
- Verify booking prevention for locked/full slots
- Test capacity adjustments with existing bookings
- Confirm template-based schedule generation
- Verify transaction rollback on publish failures

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

packages/app/src/components/QuickEntry.vue

@@ -106,6 +106,8 @@ async function handleLogin() {
   try {
     await userStore.login()
     await userStore.fetchMemberships()
+    // 登录成功后跳转到个人中心，让用户完善信息
+    uni.navigateTo({ url: '/pages/profile/info' })
   } catch {
     uni.showToast({ title: '登录失败，请重试', icon: 'none' })
   } finally {

packages/app/src/components/UserCard.vue

@@ -72,7 +72,7 @@
 </template>
 
 <script setup lang="ts">
-import { ref, computed } from 'vue'
+import { ref, computed, watch } from 'vue'
 import type { UserProfileResponse, UserStatsResponse, MembershipWithCardType } from '@mp-pilates/shared'
 import { MembershipStatus } from '@mp-pilates/shared'
 
@@ -91,6 +91,16 @@ const emit = defineEmits<{
 
 const avatarFailed = ref(false)
 
+// 头像 URL 变化时重置加载错误状态，避免新头像因偶发加载失败而被永久隐藏
+watch(
+  () => props.user?.avatarUrl,
+  (newUrl, oldUrl) => {
+    if (newUrl && newUrl !== oldUrl) {
+      avatarFailed.value = false
+    }
+  },
+)
+
 const avatarSrc = computed(() => {
   if (avatarFailed.value || !props.user?.avatarUrl) {
     return '/static/default-avatar.png'