M9：桌面壳与收口——镜匣最小壳、器谱登记、发布证据落位、重写计划功成身退

- 镜匣 desktop/（Tauri v2 最小壳）：WebView 承载琉璃镜（frontend/out 或 devUrl）；能力桥最小命令（通知）；乾坤通道 HMAC 短期凭证构造（与 sandbox/src/auth.rs 验签同算法，密钥仅经 SANDBOX_AUTH_SECRET 环境注入——二进制零平台密钥，静态审计钉死）；hard_stop/resume 本地硬急停原子断路（全部通道命令过 ensure_not_halted，本地最高优先级不经云端）；tantivy 依赖与 capabilities/ 目录预留；updater 插件位预留；cargo check 通过
- 器谱域 domains/tianzai（迁移 010）：devices/device_grants——一次配对（密钥指纹登记）、逐项授契（可授面显式枚举，未知能力键拒）、撤回立即生效、设备撤销连带全部授契失效且不可再授；/devices 器谱 API 组
- 发布收口：release-evidence.md 落位重写期 RW-* 证据包（M0–M9 十里程碑验收自动化套件与结果物）；能力矩阵 M9 行收官；rewrite-plan.md 按计划删除（M0–M9 全部完成，能力矩阵与证据台账接棒），全库引用清理
- 验收（test_m9_jingxia 四用例）：器谱未授契 403 留痕/撤回即效/设备撤销连带；镜匣零平台密钥（rg 审计源码与配置为空）；硬急停语义钉死（通道命令全检查+resume 唯一恢复+HMAC 无密钥不出凭证）
- 五套件终检全绿：后端 349、前端 203、BFF 4、神识 5 包、镜匣 cargo check（2 个预存环境失败历次 HEAD 复验与本周期无关）；Compose nginx profile 配置校验通过

backend/app/domains/tianzai/api.py

@@ -0,0 +1,66 @@
+"""器谱 API：设备配对/撤销、逐项授契/撤回、可用性裁决。"""
+
+from fastapi import APIRouter, Depends
+from pydantic import BaseModel, Field
+
+from app.api.v1.deps import get_current_user
+from app.domains.tianzai import service
+from app.schemas.auth import CurrentUser
+
+device_router = APIRouter(prefix="/devices", tags=["tianzai"])
+
+
+class PairRequest(BaseModel):
+    kind: str = "desktop_shell"
+    name: str = Field(default="", max_length=120)
+    key_fingerprint: str = Field(min_length=8, max_length=128)
+
+
+class GrantRequest(BaseModel):
+    capability: str
+    scope: dict = Field(default_factory=dict)
+
+
+@device_router.post("", status_code=201)
+async def pair_device_api(payload: PairRequest, user: CurrentUser = Depends(get_current_user)) -> dict:
+    return await service.pair_device(
+        owner_scope=user.owner_scope, kind=payload.kind,
+        name=payload.name, key_fingerprint=payload.key_fingerprint,
+    )
+
+
+@device_router.get("")
+async def list_devices_api(user: CurrentUser = Depends(get_current_user)) -> list[dict]:
+    return await service.list_devices(user.owner_scope)
+
+
+@device_router.post("/{device_id}/revoke")
+async def revoke_device_api(device_id: str, user: CurrentUser = Depends(get_current_user)) -> dict:
+    return await service.revoke_device(device_id, user.owner_scope)
+
+
+@device_router.post("/{device_id}/grants", status_code=201)
+async def grant_api(
+    device_id: str, payload: GrantRequest, user: CurrentUser = Depends(get_current_user)
+) -> dict:
+    return await service.grant(
+        device_id, user.owner_scope, capability=payload.capability, scope=payload.scope
+    )
+
+
+@device_router.get("/{device_id}/grants")
+async def list_grants_api(device_id: str, user: CurrentUser = Depends(get_current_user)) -> list[dict]:
+    return await service.list_grants(device_id, user.owner_scope)
+
+
+@device_router.post("/{device_id}/assert/{capability}")
+async def assert_grant_api(
+    device_id: str, capability: str, user: CurrentUser = Depends(get_current_user)
+) -> dict:
+    """能力使用前置裁决（未授契 403）。"""
+    return await service.assert_granted(device_id, user.owner_scope, capability)
+
+
+@device_router.post("/grants/{grant_id}/revoke")
+async def revoke_grant_api(grant_id: str, user: CurrentUser = Depends(get_current_user)) -> dict:
+    return await service.revoke_grant(grant_id, user.owner_scope)