存量前端：生图分组/灯箱/重生控件/导入文案/驳回横幅+SSE+总核销表

- ImageStrategyGroup/ImageLightbox/RegenControls/ImportTextModal/
  RejectReasonBanner 新建组件
- tasks images/text/new + history + 配置/布局/SSE hooks 存量改动
- 总核销表进度更新

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

frontend/src/app/tasks/[id]/images/page.tsx

@@ -1,16 +1,22 @@
 'use client';
-// 屏4 挑图：0/N异步电影 + 平铺选图 + 单批重试（一期=整体重生） + 能离开
+// 屏4 挑图：0/N异步电影 + 按A/B/C分组选图 + 点图放大 + 单批重试 + 能离开
+import { useState } from 'react';
 import { useRouter, useParams } from 'next/navigation';
 import { ProgressBar } from '@/components/layout/ProgressBar';
 import { FlywheelBannerFromSse } from '@/components/FlywheelBanner';
 import { ImageProgressCardSkeleton } from '@/components/tasks/ImageProgressCard';
 import { ImageProgressHeader } from '@/components/tasks/ImageProgressHeader';
 import { ImageActionBar } from '@/components/tasks/ImageActionBar';
+import { ImageLightbox } from '@/components/tasks/ImageLightbox';
+import { ImageStrategyGroup, ROLE_LABEL } from '@/components/tasks/ImageStrategyGroup';
+import { RegenControls, RegenTarget } from '@/components/tasks/RegenControls';
 import { SseStatusBar } from '@/components/tasks/SseStatusBar';
 import { FatalErrorBanner } from '@/components/tasks/FatalErrorBanner';
+import { RejectReasonBanner } from '@/components/tasks/RejectReasonBanner';
 import { useSse } from '@/hooks/useSse';
 import { useGenerationStore } from '@/stores/generationStore';
 import { useTaskStore } from '@/stores/taskStore';
+import { ImageCandidate } from '@/types/index';
 import { api } from '@/lib/api';
 
 export default function ImageSelectionPage() {
@@ -21,17 +27,45 @@ export default function ImageSelectionPage() {
   const { imageCandidates, imageDone, imageTotal, failedBatches, flywheelInjected } = useGenerationStore();
   const { selectedImageIds, toggleImageSelection } = useTaskStore();
   const { connectionStatus, reconnectAttempt } = useSse(taskId);
+  const [zoom, setZoom] = useState<ImageCandidate | null>(null);
+  const [regenTarget, setRegenTarget] = useState<RegenTarget | null>(null);
 
   const pendingCount = imageTotal - imageDone;
   const allDone = imageTotal > 0 && pendingCount === 0;
 
+  // 按套(A/B/C)分组展示；R2 同套同角色去重，只留最新一张（candidate_id 最大=最新重生）
+  function latestByRole(list: ImageCandidate[]): ImageCandidate[] {
+    const byRole = new Map<string, ImageCandidate>();
+    for (const c of list) {
+      const prev = byRole.get(c.role);
+      if (!prev || c.candidate_id > prev.candidate_id) byRole.set(c.role, c);
+    }
+    return Array.from(byRole.values());
+  }
+  const groups: Array<['A' | 'B' | 'C', ImageCandidate[]]> = (['A', 'B', 'C'] as const).map(
+    (s) => [s, latestByRole(imageCandidates.filter((c) => c.strategy === s))]
+  );
+
   async function handleRetry(_batchRole: string) {
-    // 一期 regenerate = 整体重生，契约无 batch 字段，不发 body
-    // 二期按批重生时再扩展，_batchRole 目前仅作入参占位（UI 提示用）
+    // 一期 regenerate = 整体重生（R2 已扩展按角色单批重生，见 handleRegen）
     if (!taskId) return;
     await api.post(`/api/v1/tasks/${taskId}/regenerate`);
   }
 
+  // R2 单张/单套重生 + 可选人工提示词
+  async function handleRegen(target: RegenTarget, customPrompt: string) {
+    if (!taskId) return;
+    await api.post(`/api/v1/tasks/${taskId}/regenerate`, {
+      strategy: target.strategy,
+      role: target.role,
+      custom_prompt: customPrompt || undefined,
+    });
+  }
+
+  function openRegen(strategy: string, role: string | undefined, label: string) {
+    setRegenTarget({ strategy: strategy as 'A' | 'B' | 'C', role, label });
+  }
+
   async function handleProceedToConfirm() {
     if (!taskId || selectedImageIds.length === 0) return;
     for (const candidateId of selectedImageIds) {
@@ -43,6 +77,7 @@ export default function ImageSelectionPage() {
   return (
     <div className="flex flex-col h-full">
       <ProgressBar currentStep={3} />
+      <RejectReasonBanner taskId={taskId} />
       {flywheelInjected && (
         <FlywheelBannerFromSse
           recentPreference={flywheelInjected.recentPreference}
@@ -53,29 +88,34 @@ export default function ImageSelectionPage() {
       <div className="p-6 flex-1 overflow-auto">
         <FatalErrorBanner />
         <ImageProgressHeader imageTotal={imageTotal} imageDone={imageDone} pendingCount={pendingCount} />
-        {/* 图片网格（谁好谁先冒） */}
-        <div className="grid grid-cols-3 xl:grid-cols-5 gap-3">
-          {imageCandidates.length === 0
-            ? Array.from({ length: 5 }).map((_, i) => <ImageProgressCardSkeleton key={i} />)
-            : imageCandidates.map((c) => (
-                <div key={c.candidate_id}
-                  onClick={() => toggleImageSelection(c.candidate_id)}
-                  className={`relative rounded-xl overflow-hidden border cursor-pointer transition-all
-                    ${selectedImageIds.includes(c.candidate_id) ? 'border-brand-orange ring-2 ring-brand-orange' : 'border-border-default hover:border-brand-orange/50'}`}
-                  aria-label={`图片 ${c.role}，${selectedImageIds.includes(c.candidate_id) ? '已选中' : '未选中'}`}
-                >
-                  <img src={c.url} alt={c.role} className="w-full aspect-square object-cover" />
-                  <p className="text-xs text-center py-1 text-text-secondary">{c.role}</p>
-                </div>
-              ))}
-        </div>
+        {imageCandidates.length === 0 ? (
+          <div className="grid grid-cols-3 gap-3 xl:grid-cols-6">
+            {Array.from({ length: 6 }).map((_, i) => <ImageProgressCardSkeleton key={i} />)}
+          </div>
+        ) : (
+          groups.map(([s, list]) =>
+            list.length > 0 ? (
+              <ImageStrategyGroup
+                key={s}
+                strategy={s}
+                candidates={list}
+                selectedImageIds={selectedImageIds}
+                onToggle={toggleImageSelection}
+                onZoom={setZoom}
+                onRegen={openRegen}
+              />
+            ) : null
+          )
+        )}
         {/* 失败批次提示 */}
         {failedBatches.length > 0 && allDone && (
           <div role="alert" className="mt-4 bg-red-50 border border-status-error rounded-xl px-4 py-3 text-sm text-status-error">
             有 {failedBatches.length} 批没出来。
             {failedBatches.filter((b) => b.retryable).map((b) => (
               <button key={b.batch} onClick={() => handleRetry(b.batch)}
-                className="ml-2 underline" aria-label={`重试第${b.batch}批`}>⟳ 重试批次{b.batch}</button>
+                className="ml-2 underline" aria-label={`重试${ROLE_LABEL[b.batch] || b.batch}`}>
+                ⟳ 重试{ROLE_LABEL[b.batch] || b.batch}
+              </button>
             ))}
           </div>
         )}
@@ -83,6 +123,16 @@ export default function ImageSelectionPage() {
           <ImageActionBar selectedCount={selectedImageIds.length} onProceed={handleProceedToConfirm} />
         )}
       </div>
+      <ImageLightbox
+        url={zoom?.url ?? null}
+        caption={zoom ? (ROLE_LABEL[zoom.role] || zoom.role) : undefined}
+        onClose={() => setZoom(null)}
+      />
+      <RegenControls
+        target={regenTarget}
+        onClose={() => setRegenTarget(null)}
+        onSubmit={handleRegen}
+      />
     </div>
   );
 }