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/frontend/src/routes/free-create.tsx

@@ -6,8 +6,10 @@ import { Users } from "lucide-react";
 import { api, ApiError } from "../api";
 import type { FreeVideoRef, FreeVideoTask, ModelConfig } from "../types";
 import {
+  DEFAULT_BILLING_RATES,
   FC_MODELS,
   FC_STANDARD_MODEL,
+  type BillingRates,
   MAX_AUDIOS,
   MAX_IMAGES,
   MAX_VIDEOS,
@@ -59,6 +61,14 @@ export function FreeCreatePage({ modelConfigs, onNotify }: {
     [modelConfigs]
   );
 
+  // 计费配置(积分汇率/视频毛利):预估口径与后端计价引擎同源;拉不到用首发默认值兜底
+  const [billingRates, setBillingRates] = useState<BillingRates>(DEFAULT_BILLING_RATES);
+  useEffect(() => {
+    void api.billingConfig()
+      .then((cfg) => setBillingRates({ margin: Number(cfg.video_margin_multiplier) || DEFAULT_BILLING_RATES.margin, rate: Number(cfg.points_per_yuan) || DEFAULT_BILLING_RATES.rate, multiplier: Number(cfg.team_price_multiplier) || 1 }))
+      .catch(() => undefined);
+  }, []);
+
   // —— 任务流 ——
   const [tasks, setTasks] = useState<FreeVideoTask[]>([]);
   const [total, setTotal] = useState(0);
@@ -504,6 +514,7 @@ export function FreeCreatePage({ modelConfigs, onNotify }: {
         seed={seed}
         refs={refs}
         videoConfigs={videoConfigs}
+        billingRates={billingRates}
         submitting={submitting}
         promptRef={promptRef}
         onFiles={(files, role) => void addFiles(files, role)}