fix: utiliser mysql2 pool explicite pour résoudre l'erreur JSON dans Drizzle

server/db.ts

@@ -1,5 +1,6 @@
 import { eq, desc, and, like, gte, lte, or, sql } from "drizzle-orm";
 import { drizzle } from "drizzle-orm/mysql2";
+import mysql from "mysql2/promise";
 import {
   InsertUser,
   users,
@@ -20,12 +21,19 @@ import {
 } from "../drizzle/schema";
 import { ENV } from "./_core/env";
 
-let _db: ReturnType<typeof drizzle> | null = null;
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+let _db: any = null;
 
 export async function getDb() {
   if (!_db && process.env.DATABASE_URL) {
     try {
-      _db = drizzle(process.env.DATABASE_URL);
+      const pool = mysql.createPool({
+        uri: process.env.DATABASE_URL,
+        waitForConnections: true,
+        connectionLimit: 10,
+        enableKeepAlive: true,
+      });
+      _db = drizzle(pool);
     } catch (error) {
       console.warn("[Database] Failed to connect:", error);
       _db = null;