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。

system/minio_utils.py

@@ -0,0 +1,78 @@
+from minio import Minio
+from django.conf import settings
+import uuid
+import os
+import json
+import logging
+
+logger = logging.getLogger(__name__)
+
+class MinioClient:
+    def __init__(self):
+        self._client = None
+        self.bucket_name = getattr(settings, 'MINIO_BUCKET_NAME', 'opc-assets')
+        self._initialized = False
+
+    @property
+    def client(self):
+        if self._client is None:
+            self._client = Minio(
+                endpoint=getattr(settings, 'MINIO_ENDPOINT', 'localhost:9000'),
+                access_key=getattr(settings, 'MINIO_ACCESS_KEY', 'minioadmin'),
+                secret_key=getattr(settings, 'MINIO_SECRET_KEY', 'minioadmin'),
+                secure=getattr(settings, 'MINIO_SECURE', False)
+            )
+        if not self._initialized:
+            try:
+                self._ensure_bucket()
+                self._initialized = True
+            except Exception as e:
+                logger.warning(f'MinIO bucket init failed (will retry on next call): {e}')
+        return self._client
+
+    def _ensure_bucket(self):
+        if not self._client.bucket_exists(self.bucket_name):
+            self._client.make_bucket(self.bucket_name)
+        
+        # Always update policy to ensure public access
+        policy = {
+            "Version": "2012-10-17",
+            "Statement": [
+                {
+                    "Effect": "Allow",
+                    "Principal": {"AWS": ["*"]},
+                    "Action": ["s3:GetBucketLocation", "s3:ListBucket"],
+                    "Resource": [f"arn:aws:s3:::{self.bucket_name}"],
+                },
+                {
+                    "Effect": "Allow",
+                    "Principal": {"AWS": ["*"]},
+                    "Action": ["s3:GetObject"],
+                    "Resource": [f"arn:aws:s3:::{self.bucket_name}/*"],
+                },
+            ],
+        }
+        self._client.set_bucket_policy(self.bucket_name, json.dumps(policy))
+
+    def upload_file(self, file_obj, folder='general'):
+        # Generate a unique name
+        ext = os.path.splitext(file_obj.name)[1]
+        file_name = f"{folder}/{uuid.uuid4()}{ext}"
+        
+        # Upload (this will trigger lazy init of the client)
+        self.client.put_object(
+            self.bucket_name,
+            file_name,
+            file_obj,
+            length=file_obj.size,
+            content_type=file_obj.content_type
+        )
+        
+        # Return the public URL
+        base_url = getattr(settings, 'MINIO_PUBLIC_URL', 'http://127.0.0.1:9000')
+        return f"{base_url}/{self.bucket_name}/{file_name}"
+
+
+# Lazy singleton — does NOT connect at import time
+minio_client = MinioClient()
+