feat(training-plans): 添加训练计划名称字段并实现软删除功能

- 在 DTO 和模型中新增 name 字段，支持可选的计划名称
- 实现分页查询功能，优化列表接口返回结构
- 将删除操作改为软删除，新增 deleted 字段控制
- 更新服务逻辑以支持新字段和分页参数

src/training-plans/training-plans.service.ts

@@ -19,6 +19,7 @@ export class TrainingPlansService {
     const plan = await this.trainingPlanModel.create({
       id,
       userId,
+      name: dto.name ?? '',
       createdAt,
       startDate: new Date(dto.startDate),
       mode: dto.mode,
@@ -39,7 +40,10 @@ export class TrainingPlansService {
   }
 
   async remove(userId: string, id: string) {
-    const count = await this.trainingPlanModel.destroy({ where: { id, userId } });
+    const [count] = await this.trainingPlanModel.update(
+      { deleted: true },
+      { where: { id, userId, deleted: false } }
+    );
     if (count > 0) {
       await this.activityLogsService.record({
         userId,
@@ -52,14 +56,26 @@ export class TrainingPlansService {
     return { success: count > 0 };
   }
 
-  async list(userId: string) {
-    const rows = await this.trainingPlanModel.findAll({ where: { userId }, order: [['created_at', 'DESC']] });
-    return rows.map(r => ({
-      id: r.id,
-      createdAt: r.createdAt,
-      startDate: r.startDate,
-      goal: r.goal,
-    }));
+  async list(userId: string, page: number = 1, limit: number = 10) {
+    const offset = (page - 1) * limit;
+    const { rows, count } = await this.trainingPlanModel.findAndCountAll({
+      where: { userId, deleted: false },
+      order: [['created_at', 'DESC']],
+      limit,
+      offset,
+    });
+
+    return {
+      data: rows.map(r => ({
+        id: r.id,
+        createdAt: r.createdAt,
+        startDate: r.startDate,
+        goal: r.goal,
+      })),
+      total: count,
+      page,
+      limit,
+    };
   }
 
   async detail(userId: string, id: string) {