feat(cps): 活动支持编辑(PATCH /activities/{id})

- CpsActivityUpdate schema + repo update_activity(部分更新,非 None 覆盖)
- router 按「合并后最终值」校验平台必填项(同新建口径),写审计 cps.activity.update
- 可改名/平台/对应字段/落地页图/备注/状态

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/admin/repositories/cps.py

@@ -179,6 +179,37 @@ def create_activity(
     return activity
 
 
+def update_activity(
+    db: Session, activity: CpsActivity, *, name: str | None = None,
+    platform: str | None = None, act_id: str | None = None,
+    product_view_sign: str | None = None, payload: str | None = None,
+    image_url: str | None = None, remark: str | None = None,
+    status: str | None = None, commit: bool = True,
+) -> CpsActivity:
+    if name is not None:
+        activity.name = name
+    if platform is not None:
+        activity.platform = platform
+    if act_id is not None:
+        activity.act_id = act_id
+    if product_view_sign is not None:
+        activity.product_view_sign = product_view_sign
+    if payload is not None:
+        activity.payload = payload
+    if image_url is not None:
+        activity.image_url = image_url
+    if remark is not None:
+        activity.remark = remark
+    if status is not None:
+        activity.status = status
+    if commit:
+        db.commit()
+        db.refresh(activity)
+    else:
+        db.flush()
+    return activity
+
+
 def delete_activity(db: Session, activity: CpsActivity, *, commit: bool = True) -> None:
     """硬删活动。不级联删 cps_link(已发链接继续可用;淘宝落地页缺活动时取图走兜底默认图)。"""
     db.delete(activity)

app/admin/routers/cps.py

@@ -19,6 +19,7 @@ from app.admin.schemas.common import CursorPage
 from app.admin.schemas.cps import (
     CpsActivityCreate,
     CpsActivityOut,
+    CpsActivityUpdate,
     CpsGroupCreate,
     CpsGroupOut,
     CpsGroupStat,
@@ -192,6 +193,47 @@ def create_activity(
     return CpsActivityOut.model_validate(activity)
 
 
+@router.patch("/activities/{activity_id}", response_model=CpsActivityOut, summary="编辑活动")
+def update_activity(
+    activity_id: int,
+    body: CpsActivityUpdate,
+    request: Request,
+    admin: Annotated[AdminUser, Depends(require_role("operator"))],
+    db: AdminDb,
+) -> CpsActivityOut:
+    activity = cps_repo.get_activity(db, activity_id)
+    if activity is None:
+        raise HTTPException(status_code=404, detail="活动不存在")
+    # 用「合并后最终值」校验平台必填项(同新建口径),允许只改部分字段
+    platform = body.platform or activity.platform
+    act_id = body.act_id if body.act_id is not None else activity.act_id
+    pvs = body.product_view_sign if body.product_view_sign is not None else activity.product_view_sign
+    payload = body.payload if body.payload is not None else activity.payload
+    image_url = body.image_url if body.image_url is not None else activity.image_url
+    if platform == "meituan":
+        if not act_id and not pvs:
+            raise HTTPException(status_code=400, detail="美团活动需填 actId 或 productViewSign")
+    else:  # taobao / jd
+        if not payload:
+            label = "淘口令" if platform == "taobao" else "推广链接"
+            raise HTTPException(status_code=400, detail=f"{platform} 活动需填{label}")
+        if platform == "taobao" and not image_url:
+            raise HTTPException(status_code=400, detail="淘宝活动需提供落地页图(上传或选已有)")
+    cps_repo.update_activity(
+        db, activity, name=body.name, platform=body.platform, act_id=body.act_id,
+        product_view_sign=body.product_view_sign, payload=body.payload,
+        image_url=media.to_abs_media_url(body.image_url) if body.image_url else None,
+        remark=body.remark, status=body.status, commit=False,
+    )
+    write_audit(
+        db, admin, action="cps.activity.update", target_type="cps_activity", target_id=activity_id,
+        detail=body.model_dump(exclude_none=True), ip=get_client_ip(request), commit=False,
+    )
+    db.commit()
+    db.refresh(activity)
+    return CpsActivityOut.model_validate(activity)
+
+
 @router.post("/upload-image", summary="上传活动落地页图(返回绝对 URL)")
 async def upload_activity_image(
     admin: Annotated[AdminUser, Depends(require_role("operator"))],

app/admin/schemas/cps.py

@@ -71,6 +71,19 @@ class CpsActivityCreate(BaseModel):
     remark: str | None = Field(default=None, max_length=256)
 
 
+class CpsActivityUpdate(BaseModel):
+    """编辑活动(PATCH):全字段可选,只更新传入的非 None 项;最终平台对应字段由 router 校验。"""
+
+    name: str | None = Field(default=None, min_length=1, max_length=128)
+    platform: str | None = Field(default=None, pattern=r"^(meituan|taobao|jd)$")
+    act_id: str | None = Field(default=None, max_length=64)
+    product_view_sign: str | None = Field(default=None, max_length=128)
+    payload: str | None = Field(default=None, max_length=4096)
+    image_url: str | None = Field(default=None, max_length=512)
+    remark: str | None = Field(default=None, max_length=256)
+    status: str | None = Field(default=None, pattern=r"^(active|archived)$")
+
+
 # ───────────── 生成链接(批量) ─────────────
 class CpsReferralLinksRequest(BaseModel):
     group_id: int