Migrate from next-auth to better-auth (#885)

* migrated to better auth

* user

* oauth

* type error

* test

* zod v4

* cleanup

* types

* zod v4 migation

* lint

Author: sinamics

.gitignore

@@ -7,7 +7,7 @@
 /tmp
 # testing
 /coverage
-
+/.claude/skills/
 # database
 /prisma/db.sqlite
 /prisma/db.sqlite-journal

jest.api.config.ts

@@ -47,5 +47,7 @@ const createJestConfig = nextJest(nextConfig);
 export default async () => ({
 	// biome-ignore lint/suspicious/noExplicitAny: <explanation>
 	...(await createJestConfig(jestConfig as any)()),
-	transformIgnorePatterns: ["node_modules/(?!next-intl)/"],
+	transformIgnorePatterns: [
+		"node_modules/(?!next-intl|better-auth|@better-auth)/",
+	],
 });

jest.pages.config.ts

@@ -16,7 +16,7 @@ const jestConfig: JestConfigWithTsJest = {
     "^.+\\.mjs$": "ts-jest",
   },
   setupFilesAfterEnv: ["<rootDir>/jest.setup.ts"],
-  testEnvironment: "jest-environment-jsdom",
+  testEnvironment: "jest-fixed-jsdom",
   modulePathIgnorePatterns: ["<rootDir>/docs/"],
   moduleNameMapper: {
     "^~/(.*)$": "<rootDir>/src/$1",
@@ -29,5 +29,7 @@ const jestConfig: JestConfigWithTsJest = {
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export default async () => ({
   ...(await createJestConfig(jestConfig as any)()),
-  transformIgnorePatterns: ["node_modules/(?!next-intl)/"],
+  transformIgnorePatterns: [
+    "node_modules/(?!next-intl|better-auth|@better-auth)/",
+  ],
 });

next.config.mjs

@@ -7,6 +7,7 @@
 /** @type {import("next").NextConfig} */
 const config = {
 	reactStrictMode: true,
+	allowedDevOrigins: ["10.0.0.217"],
 	// https://nextjs.org/docs/advanced-features/output-file-tracing
 	output: "standalone",
 	/**
@@ -20,7 +21,6 @@ const config = {
 		// localeDetection: false,
 		locales: ["en", "fr", "no", "pl", "zh-tw", "zh", "es", "ru", "de", "ua"],
 	},
-	trailingSlash: true,
 	async redirects() {
 		return [
 			{