feat: 业务层 services 抽取完成（工作台/用户管理）

- DashboardService：OPC 工作台聚合（统计/进行中任务/智能体建议/月度收入/消息）
- UserAdminService：建号+默认身份联动、角色分配提权防护（action:role.grant_perm 仅超管）
- rbac_opc dashboard / rbac_admin create_user+set_role 接线
- services 层覆盖全部核心业务域，路由全瘦身

app/services/user_admin_service.py

@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+"""业务层 · 用户管理服务（角色分配提权防护 + 建号联动默认身份）。"""
+from __future__ import annotations
+
+from fastapi import HTTPException
+
+from ..infrastructure.repositories import Database
+
+# 业务角色 → 端口映射（与领域规则一致）
+_PORT_FOR_ROLE = {
+    "opc_member": "opc", "carrier": "carrier", "enterprise": "enterprise",
+    "provider": "provider", "government": "government", "operator": "operator",
+    "investor": "investor", "developer": "developer",
+}
+
+
+class UserAdminService:
+    """运营端账号/角色管理。"""
+
+    def __init__(self, db: Database):
+        self.db = db
+
+    async def _validate_role_assignment(self, actor: dict, role: str, sub_role: str | None) -> None:
+        """白名单 + 提权防护：拒绝非法角色组合，及无权者创建/提升特权角色。"""
+        key = role if not sub_role else f"{role}|{sub_role}"
+        if not await self.db.roles.role_exists(role):
+            raise HTTPException(status_code=400, detail=f"无效角色: {role}")
+        if sub_role and not await self.db.roles.role_exists(f"{role}|{sub_role}"):
+            raise HTTPException(status_code=400, detail=f"无效角色组合: {key}")
+        if "action:role.grant_perm" in await self.db.roles.permissions_for(role, sub_role) \
+                and "action:role.grant_perm" not in actor.get("permissions", []):
+            raise HTTPException(status_code=403, detail="无权创建/分配特权角色（仅超级管理员）")
+
+    async def create_user(self, req, actor: dict) -> dict:
+        """创建账号 + 自动创建默认端口身份（含提权防护）。"""
+        if not req.username.strip() or not req.password.strip():
+            raise HTTPException(status_code=400, detail="账号与密码必填")
+        if await self.db.users.get_by_username(req.username) is not None:
+            raise HTTPException(status_code=400, detail="账号已存在")
+        await self._validate_role_assignment(actor, req.role, req.sub_role)
+        user = await self.db.users.create(
+            req.username, req.password, nickname=req.nickname,
+            role=req.role, sub_role=req.sub_role, org_id=req.org_id, region_id=req.region_id,
+        )
+        await self.db.identities.create(
+            user["id"], port=_PORT_FOR_ROLE.get(req.role, "opc"), role=req.role,
+            sub_role=req.sub_role, org_id=req.org_id, region_id=req.region_id,
+            name=req.nickname or req.username,
+        )
+        return await self.db.users.to_profile(user)
+
+    async def set_user_role(self, actor: dict, user_id: str, role: str, sub_role: str, org_id: str, region_id: str) -> dict:
+        """分配角色（含提权防护，同步主身份并失效旧令牌）。"""
+        await self._validate_role_assignment(actor, role, sub_role)
+        return await self.db.users.set_role(user_id, role, sub_role, org_id, region_id)