feat: Puente Mayúscula-Minúscula + TTS SpeechSynthesis + E2E fixes

lib/db.ts

@@ -0,0 +1,9 @@
+import { PrismaClient } from "@prisma/client"
+
+const globalForPrisma = globalThis as unknown as {
+  prisma: PrismaClient | undefined
+}
+
+export const prisma = globalForPrisma.prisma ?? new PrismaClient()
+
+if (process.env.NODE_ENV !== "production") globalForPrisma.prisma = prisma