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/models.py

@@ -0,0 +1,132 @@
+import uuid
+from django.db import models
+
+class NotificationType(models.TextChoices):
+    SYSTEM = 'SYSTEM', '系统通知'
+    CERTIFICATION = 'CERTIFICATION', '认证通知'
+    TASK = 'TASK', '任务通知'
+    RESERVATION = 'RESERVATION', '预约通知'
+
+class SmsScene(models.TextChoices):
+    REGISTER = 'REGISTER', '注册'
+    LOGIN = 'LOGIN', '登录'
+    RESET_PASSWORD = 'RESET_PASSWORD', '重置密码'
+
+class AudienceChoices(models.TextChoices):
+    ALL = 'ALL', '全平台'
+    USER = 'USER', '用户端'
+    ENTERPRISE = 'ENTERPRISE', '企业端'
+
+class Announcement(models.Model):
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    title = models.CharField(max_length=256)
+    content = models.TextField()
+    cover_url = models.CharField(max_length=512, null=True, blank=True)
+    publisher = models.ForeignKey('users.User', on_delete=models.CASCADE, related_name='published_announcements')
+    target_audience = models.CharField(max_length=16, choices=AudienceChoices.choices, default=AudienceChoices.ALL, help_text='公告受众')
+    is_published = models.BooleanField(default=False)
+    published_at = models.DateTimeField(null=True, blank=True)
+    is_deleted = models.BooleanField(default=False)
+    is_recommended = models.BooleanField(default=False, help_text='推荐/置顶')
+    recommend_priority = models.IntegerField(default=0, help_text='推荐优先级, 越大越靠前')
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = 'announcements'
+        ordering = ['-is_recommended', '-recommend_priority', '-created_at']
+
+class ModelToken(models.Model):
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    user = models.ForeignKey('users.User', on_delete=models.CASCADE, related_name='model_tokens')
+    model_id = models.CharField(max_length=128)
+    model_name = models.CharField(max_length=256, null=True, blank=True)
+    token_value = models.TextField()
+    expires_at = models.DateTimeField(null=True, blank=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        db_table = 'model_tokens'
+
+class SmsVerification(models.Model):
+    phone = models.CharField(max_length=20)
+    scene = models.CharField(max_length=32, choices=SmsScene.choices)
+    code = models.CharField(max_length=8)
+    is_used = models.BooleanField(default=False)
+    expired_at = models.DateTimeField()
+    used_at = models.DateTimeField(null=True, blank=True)
+    ip = models.GenericIPAddressField(null=True, blank=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        db_table = 'sms_verifications'
+
+class AuditLog(models.Model):
+    user = models.ForeignKey('users.User', on_delete=models.SET_NULL, null=True, blank=True, related_name='audit_logs')
+    action = models.CharField(max_length=128)
+    resource = models.CharField(max_length=128, null=True, blank=True)
+    resource_id = models.CharField(max_length=128, null=True, blank=True)
+    detail = models.JSONField(default=dict)
+    ip = models.GenericIPAddressField(null=True, blank=True)
+    user_agent = models.TextField(null=True, blank=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        db_table = 'audit_logs'
+
+class Notification(models.Model):
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    user = models.ForeignKey('users.User', on_delete=models.CASCADE, related_name='notifications')
+    type = models.CharField(max_length=32, choices=NotificationType.choices)
+    title = models.CharField(max_length=256)
+    content = models.TextField()
+    related_id = models.CharField(max_length=128, null=True, blank=True)
+    is_read = models.BooleanField(default=False)
+    is_deleted = models.BooleanField(default=False)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        db_table = 'notifications'
+
+class SystemConfig(models.Model):
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    config_key = models.CharField(max_length=128, unique=True)
+    config_value = models.JSONField()
+    description = models.TextField(null=True, blank=True)
+    updated_by = models.ForeignKey('users.User', on_delete=models.SET_NULL, null=True, blank=True, related_name='updated_configs')
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = 'system_configs'
+
+class AiModel(models.Model):
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    name = models.CharField(max_length=128)
+    provider = models.CharField(max_length=128)
+    description = models.TextField(null=True, blank=True)
+    icon = models.CharField(max_length=64, null=True, blank=True)
+    price_per_token = models.DecimalField(max_digits=10, decimal_places=6, default=0)
+    is_active = models.BooleanField(default=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        db_table = 'ai_models'
+
+
+class Skill(models.Model):
+    """Admin-managed skill/expertise domain tags used across the platform."""
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    name = models.CharField(max_length=64, unique=True)
+    category = models.CharField(max_length=64, null=True, blank=True, help_text='分类: 技术/设计/内容/数据 等')
+    sort_order = models.IntegerField(default=0, help_text='排序权重, 越小越靠前')
+    is_active = models.BooleanField(default=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = 'skills'
+        ordering = ['sort_order', 'name']
+
+    def __str__(self):
+        return self.name
+