fix(billing): 封住发布前计费竞态

阻止上游提交状态不明的任务被租约接管后重复执行，并为人工复核保留可操作的结算记录。

将生产提交绑定到当前估价签名，统一复用预处理快照，并补强规则形状、定点溢出与历史规则兼容校验。

已通过 PostgreSQL 16 集成测试、Go 全量测试与静态检查、前端测试与构建、OpenAPI、依赖审计、镜像、迁移、流水线和 SemVer 门禁。

apps/web/src/pages/PlaygroundPage.tsx

@@ -66,6 +66,7 @@ type MediaEstimateState = {
   error?: string;
   pricingVersion?: string;
   resolver?: string;
+  signature?: string;
   status: 'idle' | 'loading' | 'ready' | 'free' | 'unavailable' | 'error';
 };
 
@@ -192,18 +193,19 @@ export function PlaygroundPage(props: {
     const sequence = mediaEstimateSequenceRef.current + 1;
     mediaEstimateSequenceRef.current = sequence;
     const controller = new AbortController();
-    setMediaEstimate((current) => ({ ...current, error: '', status: 'loading' }));
+    setMediaEstimate((current) => ({ ...current, error: '', signature: mediaEstimateSignature, status: 'loading' }));
     const timer = window.setTimeout(() => {
       estimatePricing(credential, mediaEstimatePayload, controller.signal)
         .then((estimate) => {
           if (controller.signal.aborted || sequence !== mediaEstimateSequenceRef.current) return;
-          setMediaEstimate(mediaEstimateFromResponse(estimate));
+          setMediaEstimate({ ...mediaEstimateFromResponse(estimate), signature: mediaEstimateSignature });
         })
         .catch((err) => {
           if (controller.signal.aborted || sequence !== mediaEstimateSequenceRef.current) return;
           const unavailable = err instanceof GatewayApiError && err.details.code === 'pricing_unavailable';
           setMediaEstimate({
             error: err instanceof Error ? err.message : unavailable ? '价格不可用' : '预计扣费计算失败',
+            signature: mediaEstimateSignature,
             status: unavailable ? 'unavailable' : 'error',
           });
         });
@@ -326,17 +328,34 @@ export function PlaygroundPage(props: {
       setMediaMessage(runMode === 'video' ? '请输入视频提示词。' : '请输入图片提示词。');
       return;
     }
-    if (!overrides && !mediaEstimateAllowsProduction(mediaEstimate)) {
+    const runUploads = sanitizeMediaRunUploads(overrides?.uploads ?? mediaUploads);
+    const runVideoMode = overrides?.videoMode ?? videoMode;
+    const runModelOption = modelOptions.find((item) => item.value === runModel);
+    const runEstimatePayload = buildMediaEstimatePayload(runMode, runModel, trimmedPrompt, runSettings, runUploads, runVideoMode, {
+      supportsQualityControl: runModelOption
+        ? deriveMediaModelCapabilities(runModelOption.models, runMode, runVideoMode, runSettings.resolution).supportsQualityControl
+        : mediaCapabilities?.supportsQualityControl,
+    });
+    const runEstimateSignature = billingEstimateSignature(runEstimatePayload);
+    if (!overrides && !mediaEstimateAllowsProduction(mediaEstimate, runEstimateSignature)) {
       setMediaMessage(mediaEstimate.status === 'unavailable'
         ? '当前参数没有可用价格，已阻止生产生成。'
         : '请等待当前参数的预计费用计算完成后再生成。');
       return;
     }
+    if (overrides) {
+      try {
+        await estimatePricing(credential, runEstimatePayload);
+      } catch (error) {
+        const unavailable = error instanceof GatewayApiError && error.details.code === 'pricing_unavailable';
+        setMediaMessage(unavailable
+          ? '当前参数没有可用价格，已阻止生产生成。'
+          : `预计扣费计算失败，未提交生产任务：${error instanceof Error ? error.message : '未知错误'}`);
+        return;
+      }
+    }
 
     const localId = newLocalId();
-    const runUploads = sanitizeMediaRunUploads(overrides?.uploads ?? mediaUploads);
-    const runVideoMode = overrides?.videoMode ?? videoMode;
-    const runModelOption = modelOptions.find((item) => item.value === runModel);
     const modelLabel = runModelOption?.label ?? runModel;
     const run: MediaGenerationRun = {
       createdAt: new Date().toISOString(),
@@ -475,7 +494,7 @@ export function PlaygroundPage(props: {
       imageHasReference={effectiveImageHasReference}
       mediaSettings={mediaSettings}
       mediaEstimate={mediaEstimate}
-      submitDisabled={!mediaEstimateAllowsProduction(mediaEstimate)}
+      submitDisabled={!mediaEstimateAllowsProduction(mediaEstimate, mediaEstimateSignature)}
       mediaCapabilities={mediaCapabilities}
       uploadAccept={mediaUploadAcceptValue}
       uploadMessage={mediaUploadMessage}
@@ -901,8 +920,8 @@ function mediaEstimateAriaLabel(estimate: MediaEstimateState) {
   return `预计扣费 ${formatEstimateAmount(estimate.amount)} ${estimate.currency || 'resource'}`;
 }
 
-function mediaEstimateAllowsProduction(estimate: MediaEstimateState) {
-  return estimate.status === 'ready' || estimate.status === 'free';
+export function mediaEstimateAllowsProduction(estimate: MediaEstimateState, signature: string) {
+  return estimate.signature === signature && (estimate.status === 'ready' || estimate.status === 'free');
 }
 
 export function billingEstimateSignature(payload: Record<string, unknown> | null) {