rebrand: PropDataGuard → DataPointer

- App name: PropDataGuard → DataPointer
- Frontend title: 财险数据分级分类平台 → 数据分类分级管理平台
- LocalStorage keys: pdg_token/pdg_refresh → dp_token/dp_refresh
- Package name: prop-data-guard-frontend → data-pointer-frontend
- Project config: admin@propdataguard.com → admin@datapo.com
- Celery app name: prop_data_guard → data_pointer
- Layout logo, login title, page title all updated

backend/app/core/config.py

@@ -3,7 +3,7 @@ from typing import List
 
 
 class Settings(BaseSettings):
-    PROJECT_NAME: str = "PropDataGuard"
+    PROJECT_NAME: str = "DataPointer"
     VERSION: str = "0.1.0"
     DESCRIPTION: str = "财产保险行业数据分级分类管理平台"
 
@@ -25,7 +25,7 @@ class Settings(BaseSettings):
 
     FIRST_SUPERUSER_USERNAME: str = "admin"
     FIRST_SUPERUSER_PASSWORD: str = "admin123"
-    FIRST_SUPERUSER_EMAIL: str = "admin@propdataguard.com"
+    FIRST_SUPERUSER_EMAIL: str = "admin@datapo.com"
 
     class Config:
         env_file = ".env"