feat: 修复 H5 底部导航覆盖 + 更新项目进度文档

## H5 底部导航修复 (Bug #10)
- 精简 App.vue，移除重复 tabbar，仅保留全局样式
- uni-page 设置 height: calc(100% - 50px) + overflow-y: auto
- 内容区域精确停在底部导航上方，独立滚动不再叠加
- 恢复 custom-tab-bar 组件

## 项目进度文档
- PROGRESS.md 更新至 10 个 Bug 修复
- 新增 H5 底部导航修复记录
- 新增历史变更条目

backend/alembic/env.py

@@ -13,7 +13,7 @@ if config.config_file_name is not None:
     fileConfig(config.config_file_name)
 
 from app.database import Base
-from app.models import User, Product, Customer, Conversation, Message, Quotation, QuotationItem, CorpusEntry
+from app.models import User, Product, Customer, Conversation, Message, Quotation, QuotationItem, CorpusEntry, Team, TeamMember, UsageLog, Notification, Feedback, Subscription, PreferenceAnalysis, MarketingEffect, Device, FollowupStrategy, FollowupLog
 
 target_metadata = Base.metadata