feat(billing): 计费商业化重构(积分制)+ 团队差异化调价

统一计价引擎 apps/billing/pricing.py:1积分=¥0.1,平台成本(¥)与用户价(积分)双记账,
视频按火山真实 usage.total_tokens 结算(true-up,终结¥1/段倒贴)+ 首发×1.5毛利系数。
Team.price_multiplier 差异化调价(jimeng同款):挂牌价×系数两步HALF_UP取整,视频类
按下单时的价格/汇率快照结算(中途改配不影响在途任务)。

BillingConfig 单例(汇率/毛利系数/预留buffer,admin可调即刻生效)。存量数据 ×10 rescale
迁移(RunPython+atomic,MySQL 迁移不可中断重跑)。开户赠送归零(DEFAULT_TRIAL_CREDITS=0,
商业决策)。audit_billing 加 I9(卖亏审计)。271 条测试 + tsc/build 全绿。

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

core/backend/apps/adminpanel/serializers.py

@@ -75,7 +75,7 @@ class AdminTeamSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = Team
-        fields = ["id", "name", "status", "owner", "owner_username", "member_count", "balance", "created_at"]
+        fields = ["id", "name", "status", "owner", "owner_username", "member_count", "balance", "price_multiplier", "created_at"]
         read_only_fields = fields
 
     def get_member_count(self, obj):
@@ -116,18 +116,38 @@ class AdminTaskSerializer(serializers.ModelSerializer):
     team_name = serializers.CharField(source="team.name", read_only=True, default=None)
     model_name = serializers.CharField(source="model_config.name", read_only=True, default=None)
     cost_anomaly = serializers.SerializerMethodField()
+    # 单任务毛利(¥):actual_cost(积分)÷汇率 − base_cost。base_cost=0(成本未知)时 None,报表侧过滤
+    margin_yuan = serializers.SerializerMethodField()
 
     class Meta:
         model = AITask
         fields = [
             "id", "task_type", "status", "team", "team_name", "model_name",
-            "estimated_cost", "actual_cost", "cost_anomaly", "error_code", "created_at",
+            "estimated_cost", "actual_cost", "base_cost", "margin_yuan", "cost_anomaly", "error_code", "created_at",
         ]
         read_only_fields = fields
 
     def get_cost_anomaly(self, obj) -> bool:
         return is_cost_anomaly(obj.estimated_cost, obj.actual_cost)
 
+    def get_margin_yuan(self, obj) -> str | None:
+        base = obj.base_cost or Decimal("0")
+        actual = obj.actual_cost or Decimal("0")
+        if base <= 0 or actual <= 0:
+            return None
+        from apps.billing.pricing import get_billing_config
+
+        # 优先用任务计价当时的汇率快照:汇率调整不追溯历史,毛利报表不整体漂移(review 确认)。
+        # __dict__ 直取避免触发 deferred 列加载(有的列表 queryset 会 defer payload)。
+        payload = obj.__dict__.get("request_payload") or {}
+        try:
+            rate = Decimal(str(payload.get("points_per_yuan_snapshot") or "")) if payload.get("points_per_yuan_snapshot") else get_billing_config().points_per_yuan
+        except Exception:  # noqa: BLE001
+            rate = get_billing_config().points_per_yuan
+        if rate <= 0:
+            return None
+        return str((actual / rate - base).quantize(Decimal("0.01")))
+
 
 class AdminTaskDetailSerializer(AdminTaskSerializer):
     class Meta(AdminTaskSerializer.Meta):

core/backend/apps/adminpanel/urls.py

@@ -2,6 +2,7 @@ from django.urls import path
 
 from .views import (
     admin_asset_reviews,
+    admin_billing_config,
     admin_asset_reviews_poll,
     admin_asset_reviews_submit,
     admin_invitations,
@@ -25,6 +26,7 @@ from .views import (
     admin_quality_words,
     admin_revoke_invitation,
     admin_team_detail,
+    admin_team_pricing,
     admin_team_toggle,
     admin_teams,
     admin_user_reset_password,
@@ -39,6 +41,7 @@ urlpatterns = [
     path("teams/", admin_teams, name="admin-teams"),
     path("teams/<uuid:team_id>/", admin_team_detail, name="admin-team-detail"),
     path("teams/<uuid:team_id>/toggle/", admin_team_toggle, name="admin-team-toggle"),
+    path("teams/<uuid:team_id>/pricing/", admin_team_pricing, name="admin-team-pricing"),
     path("users/", admin_users, name="admin-users"),
     path("users/<uuid:user_id>/toggle/", admin_user_toggle, name="admin-user-toggle"),
     path("users/<uuid:user_id>/reset-password/", admin_user_reset_password, name="admin-user-reset-password"),
@@ -54,6 +57,7 @@ urlpatterns = [
     path("tasks/<uuid:task_id>/retry/", admin_task_retry, name="admin-task-retry"),
     path("ledgers/", admin_ledgers, name="admin-ledgers"),
     path("ledgers/adjust/", admin_ledger_adjust, name="admin-ledger-adjust"),
+    path("billing-config/", admin_billing_config, name="admin-billing-config"),
     path("quota-policies/", admin_quota_policies, name="admin-quota-policies"),
     path("quota-policies/<uuid:policy_id>/", admin_quota_policy_detail, name="admin-quota-policy-detail"),
     path("providers/", admin_providers, name="admin-providers"),

core/backend/apps/adminpanel/views.py

@@ -1,6 +1,6 @@
 """平台超管后台 · 跨团队端点。所有视图统一挂 IsPlatformAdmin,非超管一律 403,写操作记审计。"""
 
-from decimal import Decimal
+from decimal import Decimal, ROUND_HALF_UP
 
 from django.db.models import Count, F, Q
 from rest_framework import status
@@ -15,7 +15,8 @@ from apps.accounts.serializers import InvitationSerializer
 from apps.ai.models import AITask, ModelConfig, ModelProvider, PromptTemplate, QualityWord
 from apps.assets.models import Asset
 from apps.assets.review import poll_asset_review, submit_asset_for_review
-from apps.billing.models import CreditLedger, QuotaPolicy
+from apps.billing.models import BillingConfig, CreditLedger, QuotaPolicy
+from apps.billing.pricing import get_billing_config, invalidate_billing_config_cache
 from apps.billing.services.ledger import adjust_credit
 from apps.common.pagination import DefaultPagination
 from apps.products.models import Product
@@ -160,6 +161,38 @@ def admin_team_toggle(request, team_id):
 # ─────────────────────────── 用户管理 ───────────────────────────
 
 
+@api_view(["POST"])
+@permission_classes([IsPlatformAdmin])
+def admin_team_pricing(request, team_id):
+    """团队差异化调价(jimeng 同款诉求):设置团队价格系数(0.10~10.00)。
+    最终积分价 = 挂牌价 × 系数;全部计费类型统一生效;视频在途任务用下单快照不受影响。"""
+    from decimal import InvalidOperation
+
+    team = Team.objects.filter(id=team_id).first()
+    if team is None:
+        return Response({"detail": "not found"}, status=status.HTTP_404_NOT_FOUND)
+    try:
+        value = Decimal(str(request.data.get("price_multiplier")))
+    except (InvalidOperation, TypeError, ValueError):
+        return Response({"price_multiplier": ["数值格式不正确"]}, status=status.HTTP_400_BAD_REQUEST)
+    if not value.is_finite() or value < Decimal("0.10") or value > Decimal("10"):
+        return Response({"price_multiplier": ["系数需在 0.10 ~ 10.00 之间"]}, status=status.HTTP_400_BAD_REQUEST)
+    before = str(team.price_multiplier)
+    # 显式 HALF_UP:quantize 默认银行家舍入(0.125→0.12),与全仓取整纪律不一致(review 确认)
+    team.price_multiplier = value.quantize(Decimal("0.01"), rounding=ROUND_HALF_UP)
+    team.save(update_fields=["price_multiplier", "updated_at"])
+    log_admin_action(
+        request,
+        "team.pricing_update",
+        target_type="team",
+        target_id=team.id,
+        target_name=team.name,
+        before={"price_multiplier": before},
+        after={"price_multiplier": str(team.price_multiplier)},
+    )
+    return Response(AdminTeamSerializer(_team_qs().get(id=team.id)).data)
+
+
 @api_view(["GET"])
 @permission_classes([IsPlatformAdmin])
 def admin_users(request):
@@ -496,6 +529,50 @@ def admin_ledger_adjust(request):
     return Response(AdminLedgerSerializer(ledger).data, status=status.HTTP_201_CREATED)
 
 
+def _billing_config_payload(cfg: BillingConfig) -> dict:
+    return {
+        "points_per_yuan": str(cfg.points_per_yuan),
+        "video_margin_multiplier": str(cfg.video_margin_multiplier),
+        "video_reserve_buffer": str(cfg.video_reserve_buffer),
+        "updated_at": cfg.updated_at,
+    }
+
+
+@api_view(["GET", "PATCH"])
+@permission_classes([IsPlatformAdmin])
+def admin_billing_config(request):
+    """平台计费配置(积分汇率/视频毛利系数/预留 buffer)。PATCH 即刻生效于下一次估价/结算。"""
+    from decimal import InvalidOperation
+
+    cfg = get_billing_config()
+    if request.method == "GET":
+        return Response(_billing_config_payload(cfg))
+    before = _billing_config_payload(cfg)
+    updates: dict = {}
+    for field, minimum in (("points_per_yuan", Decimal("0.01")), ("video_margin_multiplier", Decimal("0.01")), ("video_reserve_buffer", Decimal("1"))):
+        if request.data.get(field) is None:
+            continue
+        try:
+            value = Decimal(str(request.data[field]))
+        except (InvalidOperation, TypeError, ValueError):
+            return Response({field: ["数值格式不正确"]}, status=status.HTTP_400_BAD_REQUEST)
+        # Decimal("NaN") 构造不抛,比较才抛 InvalidOperation → 500(review 确认),显式拦
+        if not value.is_finite():
+            return Response({field: ["数值格式不正确"]}, status=status.HTTP_400_BAD_REQUEST)
+        if value < minimum:
+            return Response({field: [f"不能小于 {minimum}"]}, status=status.HTTP_400_BAD_REQUEST)
+        updates[field] = value
+    if not updates:
+        return Response({"detail": "没有可更新的字段"}, status=status.HTTP_400_BAD_REQUEST)
+    for field, value in updates.items():
+        setattr(cfg, field, value)
+    cfg.save(update_fields=[*updates.keys(), "updated_at"])
+    invalidate_billing_config_cache()
+    after = _billing_config_payload(cfg)
+    log_admin_action(request, "billing_config.update", target_type="billing_config", target_id=cfg.id, before=before, after=after)
+    return Response(after)
+
+
 @api_view(["GET", "POST"])
 @permission_classes([IsPlatformAdmin])
 def admin_quota_policies(request):