feat(home page): add statistical interface

api/app/services/home_page_service.py

@@ -0,0 +1,67 @@
+from datetime import datetime, timedelta
+from sqlalchemy.orm import Session
+from uuid import UUID
+
+from app.repositories.home_page_repository import HomePageRepository
+from app.schemas.home_page_schema import HomeStatistics, WorkspaceInfo
+
+class HomePageService:
+    
+    @staticmethod
+    def get_home_statistics(db: Session, tenant_id: UUID) -> HomeStatistics:
+        """获取首页统计数据"""
+        # 计算时间范围
+        now = datetime.now()
+        month_start = now.replace(day=1, hour=0, minute=0, second=0, microsecond=0)
+        week_start = now - timedelta(days=now.weekday())
+        week_start = week_start.replace(hour=0, minute=0, second=0, microsecond=0)
+        
+        # 获取各项统计数据
+        total_models, new_models_this_month = HomePageRepository.get_model_statistics(
+            db, tenant_id, month_start
+        )
+        
+        active_workspaces, new_workspaces_this_month = HomePageRepository.get_workspace_statistics(
+            db, tenant_id, month_start
+        )
+        
+        total_users, new_users_this_month = HomePageRepository.get_user_statistics(
+            db, tenant_id, month_start
+        )
+        
+        running_apps, new_apps_this_week = HomePageRepository.get_app_statistics(
+            db, tenant_id, week_start
+        )
+        
+        return HomeStatistics(
+            total_models=total_models,
+            new_models_this_month=new_models_this_month,
+            active_workspaces=active_workspaces,
+            new_workspaces_this_month=new_workspaces_this_month,
+            total_users=total_users,
+            new_users_this_month=new_users_this_month,
+            running_apps=running_apps,
+            new_apps_this_week=new_apps_this_week
+        )
+    
+    @staticmethod
+    def get_workspace_list(db: Session, tenant_id: UUID) -> list[WorkspaceInfo]:
+        """获取工作空间列表（优化版本）"""
+        workspaces, app_count_dict, user_count_dict= HomePageRepository.get_workspaces_with_counts(
+            db, tenant_id
+        )
+        
+        workspace_list = []
+        for workspace in workspaces:
+            workspace_info = WorkspaceInfo(
+                id=str(workspace.id),
+                name=workspace.name,
+                icon=workspace.icon,
+                description=workspace.description,
+                app_count=app_count_dict.get(workspace.id, 0),
+                user_count=user_count_dict.get(workspace.id, 0),
+                created_at=workspace.created_at
+            )
+            workspace_list.append(workspace_info)
+        
+        return workspace_list