新增文本题库导入功能，题目新增“解析”字段

api/models/examTask.ts

@@ -318,6 +318,89 @@ export class ExamTaskModel {
     return { data, total };
   }
 
+  static async getAllTasksWithStatsPaged(
+    input: {
+      page: number;
+      limit: number;
+      status?: 'completed' | 'ongoing' | 'notStarted';
+      endAtStart?: string;
+      endAtEnd?: string;
+    },
+  ): Promise<{ data: Array<ActiveTaskStat & { status: '已完成' | '进行中' | '未开始' }>; total: number }> {
+    const nowIso = new Date().toISOString();
+    const nowMs = Date.now();
+    const offset = (input.page - 1) * input.limit;
+
+    const whereParts: string[] = [];
+    const params: any[] = [];
+
+    if (input.status === 'completed') {
+      whereParts.push('t.end_at < ?');
+      params.push(nowIso);
+    } else if (input.status === 'ongoing') {
+      whereParts.push('t.start_at <= ? AND t.end_at >= ?');
+      params.push(nowIso, nowIso);
+    } else if (input.status === 'notStarted') {
+      whereParts.push('t.start_at > ?');
+      params.push(nowIso);
+    }
+
+    if (input.endAtStart) {
+      whereParts.push('t.end_at >= ?');
+      params.push(input.endAtStart);
+    }
+    if (input.endAtEnd) {
+      whereParts.push('t.end_at <= ?');
+      params.push(input.endAtEnd);
+    }
+
+    const whereClause = whereParts.length > 0 ? `WHERE ${whereParts.join(' AND ')}` : '';
+
+    const totalRow = await get(`SELECT COUNT(*) as total FROM exam_tasks t ${whereClause}`, params);
+    const total = Number(totalRow?.total || 0);
+
+    const tasks = await all(
+      `
+      SELECT 
+        t.id, t.name as taskName, s.name as subjectName, s.total_score as totalScore,
+        t.start_at as startAt, t.end_at as endAt
+      FROM exam_tasks t
+      JOIN exam_subjects s ON t.subject_id = s.id
+      ${whereClause}
+      ORDER BY t.end_at DESC
+      LIMIT ? OFFSET ?
+    `,
+      [...params, input.limit, offset],
+    );
+
+    const data: Array<ActiveTaskStat & { status: '已完成' | '进行中' | '未开始' }> = [];
+    for (const task of tasks) {
+      const report = await this.getReport(task.id);
+      const stat = this.buildActiveTaskStat({
+        taskId: task.id,
+        taskName: task.taskName,
+        subjectName: task.subjectName,
+        totalScore: Number(task.totalScore) || 0,
+        startAt: task.startAt,
+        endAt: task.endAt,
+        report,
+      });
+
+      const startMs = new Date(task.startAt).getTime();
+      const endMs = new Date(task.endAt).getTime();
+      const status: '已完成' | '进行中' | '未开始' =
+        Number.isFinite(endMs) && endMs < nowMs
+          ? '已完成'
+          : Number.isFinite(startMs) && startMs > nowMs
+            ? '未开始'
+            : '进行中';
+
+      data.push({ ...stat, status });
+    }
+
+    return { data, total };
+  }
+
   static async findById(id: string): Promise<ExamTask | null> {
     const sql = `SELECT id, name, subject_id as subjectId, start_at as startAt, end_at as endAt, created_at as createdAt, selection_config as selectionConfig FROM exam_tasks WHERE id = ?`;
     const row = await get(sql, [id]);