Show billing estimate and clarify session replacement

src/features/workbench/WorkbenchPage.tsx

@@ -79,7 +79,7 @@ import {
 import { isViduModel } from "../../utils/viduRouting";
 import { isPixverseModel } from "../../utils/pixverseRouting";
 import { resolveVideoRequestModel } from "../../utils/resolveVideoModel";
-import { ENTERPRISE_DEFAULT_VIDEO_MODEL } from "../../utils/enterpriseVideoPolicy";
+import { calculateEnterpriseVideoCredits, ENTERPRISE_DEFAULT_VIDEO_MODEL } from "../../utils/enterpriseVideoPolicy";
 import {
   getImageQualityOptions,
   getDefaultImageQuality,
@@ -220,6 +220,12 @@ const MODE_ICONS: Record<WorkbenchMode, ReactNode> = {
   video: <VideoCameraOutlined />,
 };
 
+function formatCreditValue(value: number): string {
+  if (!Number.isFinite(value)) return "-";
+  if (value >= 100) return Math.round(value).toLocaleString("zh-CN");
+  return Number(value.toFixed(2)).toString();
+}
+
 function WorkbenchPage({
   isAuthenticated,
   session,
@@ -464,6 +470,48 @@ function WorkbenchPage({
   const videoQualityLabel = getVideoQualityLabel(videoModel, videoQuality);
 
   const imageSettingsSummary = `${imageRatio} / ${imageQuality}`;
+  const billingEstimate = useMemo(() => {
+    if (activeMode === "image") {
+      return {
+        label: "预计 20 积分",
+        title: `图片生成按任务计费：${activeModel}，${imageSettingsSummary}，预计 20 积分`,
+      };
+    }
+    if (activeMode === "video") {
+      try {
+        const durationSeconds = Math.max(1, Math.ceil(Number(videoDuration) || 1));
+        const credits = calculateEnterpriseVideoCredits({
+          model: activeModelValue,
+          resolution: videoQuality,
+          durationSeconds,
+          muted: false,
+          hasReferenceVideo: referenceItems.some((item) => item.kind === "video"),
+        });
+        return {
+          label: `预计 ${formatCreditValue(credits)} 积分`,
+          title: `${activeModel}，${videoQualityLabel}，${durationSeconds} 秒，预计 ${formatCreditValue(credits)} 积分`,
+        };
+      } catch {
+        return {
+          label: "计费以提交后为准",
+          title: "当前模型的预估计费暂不可用，实际扣费以服务端结算为准",
+        };
+      }
+    }
+    return {
+      label: "按 Token 结算",
+      title: "文本对话按输入、输出 Token 实际用量结算，完成后显示本次积分",
+    };
+  }, [
+    activeMode,
+    activeModel,
+    activeModelValue,
+    imageSettingsSummary,
+    referenceItems,
+    videoDuration,
+    videoQuality,
+    videoQualityLabel,
+  ]);
   const composerPlaceholder =
     referenceItems.length > 0 ? `${toolTheme.placeholder}，可输入 @ 引用参考内容` : toolTheme.placeholder;
   const dropdownDirection = hasActivatedWorkspace ? "up" : "down";
@@ -2545,7 +2593,15 @@ function WorkbenchPage({
     }
   };
 
-  const sendDisabled = !inputValue.trim() || (activeMode !== "chat" && getActiveGenerationTaskCount(getGenerationUserKey(session?.user.id)) >= 3);
+  const activeGenerationCount = getActiveGenerationTaskCount(getGenerationUserKey(session?.user.id));
+  const generationLimitReached = activeMode !== "chat" && activeGenerationCount >= 3;
+  const promptIsEmpty = !inputValue.trim();
+  const sendDisabled = promptIsEmpty || generationLimitReached;
+  const sendButtonTitle = promptIsEmpty
+    ? "输入内容后可发送"
+    : generationLimitReached
+      ? `当前已有 ${activeGenerationCount} 个任务进行中，请等待任一任务完成`
+      : billingEstimate.title;
 
   const suggestedPrompts = [
     { text: "画一个赛博朋克风格的城市夜景", mode: "image" as WorkbenchMode },
@@ -2882,10 +2938,15 @@ function WorkbenchPage({
         )}
       </div>
       <div className="wb-composer__toolbar-right">
+          <span className="wb-composer__billing-estimate" title={billingEstimate.title}>
+            {billingEstimate.label}
+          </span>
           <button
             type="button"
             className={`wb-composer__send-primary${isGenerating ? " is-loading" : ""}`}
             disabled={sendDisabled || isGenerating}
+            title={isGenerating ? "任务处理中" : sendButtonTitle}
+            aria-label={isGenerating ? "任务处理中" : sendButtonTitle}
             onClick={() => {
               if (getCachedRole() === "admin") console.log("[ai/workbench-send-click]", {
                 mode: activeMode,