feat: add Auth.js authentication with email verification and login/register forms

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

prisma/migrations/20261029160422_add_verification_token/migration.sql

@@ -0,0 +1,12 @@
+-- CreateTable
+CREATE TABLE `verification_tokens` (
+    `id` INTEGER NOT NULL AUTO_INCREMENT,
+    `identifier` VARCHAR(191) NOT NULL,
+    `token` VARCHAR(191) NOT NULL,
+    `expires` DATETIME(3) NOT NULL,
+    `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+
+    UNIQUE INDEX `verification_tokens_token_key`(`token`),
+    INDEX `verification_tokens_identifier_idx`(`identifier`),
+    PRIMARY KEY (`id`)
+) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;