feat: 大量优化和bug修复

server/utils/db.ts

@@ -26,18 +26,21 @@ const createMariaDbConfig = () => {
     database: decodeURIComponent(url.pathname.slice(1)),
     connectionLimit: 5,
     connectTimeout: 15_000,
-    acquireTimeout: 20_000
+    // 正常情况下连接应立即可用；5s 内拿不到连接说明池已耗尽，快速报错优于无限挂起
+    acquireTimeout: 5_000
   };
 };
 
+type MariaDbConfig = ReturnType<typeof createMariaDbConfig>;
+
 /**
  * 创建 Prisma Client
  *
  * 连接池超时设置比默认值更宽松，是因为当前数据库是远程 MySQL，
  * 默认超时时间过短时 Node driver 可能还没建好 socket 就失败
  */
-const prismaClientSingleton = () => {
-  const adapter = new PrismaMariaDb(createMariaDbConfig());
+const prismaClientSingleton = (config: MariaDbConfig) => {
+  const adapter = new PrismaMariaDb(config);
   return new PrismaClient({ adapter });
 };
 
@@ -50,10 +53,21 @@ type PrismaClientSingleton = ReturnType<typeof prismaClientSingleton>;
  */
 const globalForPrisma = globalThis as unknown as {
   prisma: PrismaClientSingleton | undefined;
+  prismaConfigSignature: string | undefined;
 };
 
+const mariaDbConfig = createMariaDbConfig();
+const prismaConfigSignature = JSON.stringify(mariaDbConfig);
+
 /** 全项目唯一 Prisma Client 实例 */
-export const prisma = globalForPrisma.prisma ?? prismaClientSingleton();
+export const prisma =
+  globalForPrisma.prisma &&
+  globalForPrisma.prismaConfigSignature === prismaConfigSignature
+    ? globalForPrisma.prisma
+    : prismaClientSingleton(mariaDbConfig);
 
 // 生产环境由进程生命周期管理；开发环境缓存到全局，减少 HMR 连接泄漏
-if (process.env.NODE_ENV !== "production") globalForPrisma.prisma = prisma;
+if (process.env.NODE_ENV !== "production") {
+  globalForPrisma.prisma = prisma;
+  globalForPrisma.prismaConfigSignature = prismaConfigSignature;
+}