开发了多角色登录与鉴权接口：实现了普通用户、企业和管理员的登录分流，并支持Token验证。

开发了权限控制接口：实现了通过数据库分配菜单权限节点，控制接口访问安全。
开发了实名认证中心：实现了个人身份证信息与企业营业执照的提交与审核接口。
开发了任务与协作大厅核心业务：实现了任务的发布、接单、状态流转以及专家邀约接口。
配置了全局环境变量与数据库引擎：集成了 PostgreSQL 数据库、Redis 缓存与 MinIO 对象存储。

users/permissions.py

@@ -0,0 +1,31 @@
+from rest_framework import permissions
+from .models import RolePermission
+
+class HasAPIPermission(permissions.BasePermission):
+    """
+    Checks if the user has the specific API permission required by the view.
+    The view must define `required_permission = 'api:something'` or a dictionary mapping methods to permissions:
+    `required_permissions = {'GET': 'api:read', 'POST': 'api:write'}`
+    """
+    def has_permission(self, request, view):
+        if not request.user or not request.user.is_authenticated:
+            return False
+            
+        if getattr(request.user, 'is_superuser', False):
+            return True
+
+        method = request.method
+        required_perm = None
+        
+        if hasattr(view, 'required_permissions') and isinstance(view.required_permissions, dict):
+            required_perm = view.required_permissions.get(method)
+        elif hasattr(view, 'required_permission'):
+            required_perm = view.required_permission
+            
+        if not required_perm:
+            # If no permission is required, default to IsAdminUser logic for safety, 
+            # or True if you want it open. Let's require staff status by default for admin views.
+            return request.user.is_staff
+
+        user_perms = RolePermission.objects.filter(role__userrole__user=request.user).values_list('permission__code', flat=True)
+        return required_perm in user_perms