feat: Phase 1-3 全部完成 — 沙盒增强、学情分析、学习路径

backend/src/modules/models/models.service.ts

@@ -0,0 +1,21 @@
+import { Injectable } from '@nestjs/common';
+import { PrismaService } from '../../prisma/prisma.service';
+
+@Injectable()
+export class ModelsService {
+  constructor(private prisma: PrismaService) {}
+
+  async findAll(params: { featured?: boolean }) {
+    const where: any = { status: 'ACTIVE' };
+    if (params.featured) where.isFeatured = true;
+
+    return this.prisma.aiModel.findMany({
+      where,
+      orderBy: { sortOrder: 'asc' },
+    });
+  }
+
+  async findById(id: number) {
+    return this.prisma.aiModel.findUnique({ where: { id } });
+  }
+}