Rework authentication

prisma/migrations/20260101134725_use_session_cookie/migration.sql

@@ -0,0 +1,10 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `token` on the `Session` table. All the data in the column will be lost.
+  - Added the required column `cookie` to the `Session` table without a default value. This is not possible if the table is not empty.
+
+*/
+-- AlterTable
+ALTER TABLE "Session" DROP COLUMN "token",
+ADD COLUMN     "cookie" TEXT NOT NULL;