fix: EditPlanGeneration 类型对齐后端 + 生成历史弹窗字段修复

- EditPlanGeneration interface 改为匹配实际 API 响应（id 即 task_id）
- 补充 result_count/progress/error_message/logs 等字段
- GenerationHistoryModal 改用 gen.id 替代不存在的 gen.generation_task_id
- 彻底修复 P0 崩溃：generation_task_id undefined → slice 报错

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

apps/web/src/api/editPlans.ts

@@ -161,14 +161,21 @@ export interface GenerateResponse {
   clip_count: number;
 }
 
-/** 剪辑计划关联的生成记录 */
+/** 剪辑计划关联的生成记录（实际是 GenerationTask 对象） */
 export interface EditPlanGeneration {
-  id: string;
-  edit_plan_id: string;
-  generation_task_id: string;
+  id: string; // 即 generation_task_id
+  source_edit_plan_id: string;
+  template_id: string;
+  asset_ids: string[];
   status: EditPlanStatus;
-  created_at: string;
-  updated_at: string;
+  progress: number;
+  result_count: number;
+  error_message: string;
+  error_info: Record<string, unknown>;
+  logs: Array<Record<string, unknown>>;
+  retry_count: number;
+  created_at?: string;
+  updated_at?: string;
 }
 
 /** 片段生成状态 */

apps/web/src/pages/editing-planner/components/GenerationHistoryModal.tsx

@@ -65,8 +65,8 @@ const GenerationHistoryModal: React.FC<GenerationHistoryModalProps> = ({
                   return (
                     <tr key={gen.id} className="ep-gh-table-row">
                       <td className="ep-gh-td ep-gh-td-id">
-                        {gen.generation_task_id
-                          ? `${gen.generation_task_id.slice(0, 8)}...`
+                        {gen.id
+                          ? `${gen.id.slice(0, 8)}...`
                           : "—"}
                       </td>
                       <td className="ep-gh-td">