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/stores/generationStore.ts

@@ -41,6 +41,7 @@ interface GenerationState {
   setTextProgress: (done: number, total: number) => void;
   addTextCandidate: (candidate: TextCandidate) => void;
   patchTextCandidateScore: (candidateId: number, score: TextCandidate['score']) => void;
+  patchTextCandidateContent: (candidateId: number, content: string) => void;
   setImageProgress: (done: number, total: number) => void;
   addImageCandidate: (candidate: ImageCandidate) => void;
   markBatchFailed: (batch: string, reason: string, retryable: boolean) => void;
@@ -86,6 +87,14 @@ export const useGenerationStore = create<GenerationState>((set) => ({
     }));
   },
 
+  patchTextCandidateContent(candidateId, content) {
+    set((s) => ({
+      textCandidates: s.textCandidates.map((tc) =>
+        tc.candidate_id === candidateId ? { ...tc, content, edited: true } : tc
+      ),
+    }));
+  },
+
   setImageProgress(done, total) {
     set({ imageDone: done, imageTotal: total });
   },