feat: 完成现有小程序接口的全部迁移至新后端

apps/server/.agents/skills/prisma-orm-setup/references/v7-client-setup.md

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+# Prisma Client Setup
+
+Generate and instantiate **Prisma ORM 7** Client for SQL providers. For MongoDB, follow [Prisma 6 MongoDB setup](v6-mongodb.md). For an existing Prisma 6 SQL app, preserve its client setup rather than copying these examples.
+
+## 1. Install dependencies
+
+```bash
+npm install --save-dev prisma@7
+npm install @prisma/client@7 dotenv
+```
+
+For an existing application, retain its pinned releases. For a new Prisma 7 application, use compatible CLI, client, and adapter versions and check the [Prisma 7 runtime requirements](https://www.prisma.io/docs/guides/upgrade-prisma-orm/v7#prerequisites).
+
+## 2. Add generator block
+
+In `prisma/schema.prisma`:
+
+```prisma
+generator client {
+  provider = "prisma-client"
+  output   = "../generated"
+}
+```
+
+`prisma-client` requires an explicit `output` path and does not generate into `node_modules` by default.
+
+## 3. Generate Prisma Client
+
+```bash
+npx prisma generate
+```
+
+Re-run `prisma generate` after every schema change to keep the client in sync.
+
+## 4. Instantiate Prisma Client
+
+```typescript
+import 'dotenv/config'
+import { PrismaClient } from '../generated/client'
+import { PrismaPg } from '@prisma/adapter-pg'
+
+const adapter = new PrismaPg({ connectionString: process.env.DATABASE_URL })
+const prisma = new PrismaClient({ adapter })
+```
+
+If you change the generator `output`, update the import path to match. For the SQL provider workflow, replace `PrismaPg` with the adapter for your database.
+
+## 5. Use a single instance
+
+Each `PrismaClient` instance creates a connection pool. Reuse a single instance per app process to avoid exhausting database connections.