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/app/api/v1/customer.py

@@ -1,8 +1,11 @@
-from fastapi import APIRouter, Depends, HTTPException, Query
+from fastapi import APIRouter, Depends, HTTPException, Query, UploadFile, File, Response
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated, Optional
+from typing import Annotated, Optional, List
 from app.database import get_db
 from app.services.customer import CustomerService
+from app.services.customer_health import CustomerHealthService
+from app.services.import_service import import_service
+from app.services import export
 from app.core.security import decode_token
 from app.api.v1.deps import get_current_user_id
 
@@ -87,6 +90,95 @@ async def delete_customer(
     return {"message": "Customer deleted"}
 
 
+@router.post("/import")
+async def import_customers(
+    file: UploadFile = File(...),
+    user_id: str = Depends(get_current_user_id),
+    db: Annotated[AsyncSession, Depends(get_db)] = None,
+):
+    from app.workers.tasks import process_customer_import
+
+    content = await file.read()
+    filename = file.filename or ""
+
+    if filename.endswith(".xlsx"):
+        records, parse_errors = import_service.parse_xlsx(content)
+    elif filename.endswith(".csv"):
+        records, parse_errors = import_service.parse_csv(content)
+    else:
+        raise HTTPException(status_code=400, detail="Unsupported file format. Use .xlsx or .csv")
+
+    if parse_errors and not records:
+        raise HTTPException(status_code=400, detail=f"Parse failed: {'; '.join(parse_errors)}")
+
+    valid, validation_errors = import_service.validate_records(records)
+    all_errors = parse_errors + validation_errors
+    imported_count = 0
+
+    for record in valid:
+        try:
+            svc = CustomerService(db)
+            await svc.create_customer(user_id, record)
+            imported_count += 1
+        except Exception as e:
+            all_errors.append(f"Import failed for {record.get('name', 'unknown')}: {str(e)}")
+
+    return {
+        "imported": imported_count,
+        "total": len(records),
+        "errors": all_errors,
+        "filename": filename,
+    }
+
+
+@router.get("/export/csv")
+async def export_customers(
+    status: Optional[str] = None,
+    user_id: str = Depends(get_current_user_id),
+    db: Annotated[AsyncSession, Depends(get_db)] = None,
+):
+    service = CustomerService(db)
+    result = await service.list_customers(user_id, status, 1, 9999)
+    items = result.get("items", [])
+    csv_bytes = export.export_customers_csv(items)
+    return Response(
+        content=csv_bytes,
+        media_type="text/csv",
+        headers={"Content-Disposition": "attachment; filename=customers.csv"},
+    )
+
+
+@router.get("/health-overview")
+async def get_health_overview(
+    user_id: str = Depends(get_current_user_id),
+    db: Annotated[AsyncSession, Depends(get_db)] = None,
+):
+    service = CustomerHealthService(db)
+    return await service.get_health_overview(user_id)
+
+
+@router.get("/health-scores")
+async def get_all_health_scores(
+    user_id: str = Depends(get_current_user_id),
+    db: Annotated[AsyncSession, Depends(get_db)] = None,
+):
+    service = CustomerHealthService(db)
+    return {"items": await service.get_all_health_scores(user_id)}
+
+
+@router.get("/{customer_id}/health")
+async def get_customer_health(
+    customer_id: str,
+    user_id: str = Depends(get_current_user_id),
+    db: Annotated[AsyncSession, Depends(get_db)] = None,
+):
+    service = CustomerHealthService(db)
+    health = await service.get_customer_health(user_id, customer_id)
+    if not health:
+        raise HTTPException(status_code=404, detail="Customer not found")
+    return health
+
+
 @router.get("/{customer_id}/conversation")
 async def get_conversation(
     customer_id: str,