添加报表页面，更新用户管理和注册功能

db/admin.py

@@ -107,8 +107,23 @@ def get_system_stats() -> dict:
         cursor.execute("SELECT COUNT(*) as count FROM users WHERE status = 'approved'")
         approved_users = cursor.fetchone()["count"]
 
-        cursor.execute("SELECT COUNT(*) as count FROM users WHERE status = 'pending'")
-        pending_users = cursor.fetchone()["count"]
+        cursor.execute(
+            """
+            SELECT COUNT(*) as count
+            FROM users
+            WHERE date(created_at) = date('now', 'localtime')
+            """
+        )
+        new_users_today = cursor.fetchone()["count"]
+
+        cursor.execute(
+            """
+            SELECT COUNT(*) as count
+            FROM users
+            WHERE datetime(created_at) >= datetime('now', 'localtime', '-7 days')
+            """
+        )
+        new_users_7d = cursor.fetchone()["count"]
 
         cursor.execute("SELECT COUNT(*) as count FROM accounts")
         total_accounts = cursor.fetchone()["count"]
@@ -125,7 +140,8 @@ def get_system_stats() -> dict:
         return {
             "total_users": total_users,
             "approved_users": approved_users,
-            "pending_users": pending_users,
+            "new_users_today": new_users_today,
+            "new_users_7d": new_users_7d,
             "total_accounts": total_accounts,
             "vip_users": vip_users,
         }