feat: enable auth openapi and password checks

src/auth.ts

@@ -1,5 +1,8 @@
 import { betterAuth } from "better-auth";
+import { buildAuthEmail, sendEmail } from "./email";
 import { trustedOrigins, type Env } from "./env";
+import { passwordPolicy } from "./password";
+import { createAuthPlugins } from "./plugins";
 
 export function createAuth(env: Env) {
   return betterAuth({
@@ -9,6 +12,21 @@ export function createAuth(env: Env) {
     trustedOrigins: trustedOrigins(env),
     emailAndPassword: {
       enabled: true,
+      ...passwordPolicy,
+      requireEmailVerification: true,
+      revokeSessionsOnPasswordReset: true,
+      sendResetPassword: async ({ user, url }) => {
+        await sendEmail(env, buildAuthEmail({ kind: "reset-password", to: user.email, url }));
+      },
     },
+    emailVerification: {
+      sendOnSignUp: true,
+      sendOnSignIn: true,
+      autoSignInAfterVerification: true,
+      sendVerificationEmail: async ({ user, url }) => {
+        await sendEmail(env, buildAuthEmail({ kind: "verify-email", to: user.email, url }));
+      },
+    },
+    plugins: createAuthPlugins(env),
   });
 }

src/password.ts

@@ -0,0 +1,4 @@
+export const passwordPolicy = {
+  minPasswordLength: 12,
+  maxPasswordLength: 128,
+};

src/plugins.ts

@@ -0,0 +1,12 @@
+import type { BetterAuthPlugin } from "better-auth";
+import { haveIBeenPwned, openAPI } from "better-auth/plugins";
+import type { Env } from "./env";
+
+export function createAuthPlugins(_env: Env): BetterAuthPlugin[] {
+  return [
+    openAPI(),
+    haveIBeenPwned({
+      customPasswordCompromisedMessage: "This password has appeared in a data breach.",
+    }),
+  ];
+}

tests/auth-worker.test.ts

@@ -18,9 +18,10 @@ describe("cfw-auth worker", () => {
     expect(response.status).toBe(404);
   });
 
-  it("routes Better Auth traffic through /api/auth/*", async () => {
+  it("exposes Better Auth OpenAPI reference", async () => {
     const response = await worker.fetch(new Request("http://auth.local/api/auth/reference"), env);
-    expect([200, 404, 500]).toContain(response.status);
+    expect(response.status).toBe(200);
+    expect(response.headers.get("content-type") ?? "").toContain("text/html");
   });
 
   it("applies configured CORS origin for auth routes", async () => {