feat(auth): e-mail transacional real + recuperação de senha

Liga o adapter SMTP existente (packages/integrations, já era fail-soft)
a um consumidor de verdade e adiciona o fluxo completo de recuperação
de senha, faltante desde a Fase 1.

- UsersService.invite() agora envia e-mail com a senha temporária
  (mantém o retorno na resposta também — dupla entrega, eden.md §4.8).
- POST /v1/auth/forgot-password + POST /v1/auth/reset-password: token
  de 256 bits, só o hash SHA-256 persistido (users.reset_token_hash/
  reset_token_expires_at — colunas que já existiam desde a baseline da
  Fase 1, nunca usadas até agora), validade de 1h, uso único, revoga
  todas as sessões ativas do usuário ao concluir. Mesma disciplina
  anti-enumeração do login: resposta idêntica para e-mail cadastrado
  ou não.
- Frontend: link "Esqueci minha senha" no LoginPage, novas
  ForgotPasswordPage/ResetPasswordPage.

Teste de integração novo (password-reset.spec.ts, 3 testes) usa
vi.mock para interceptar sendMail e recuperar o token real do corpo do
e-mail — única forma de testar o caminho feliz de ponta a ponta, já
que o token nunca é devolvido na resposta da API. Suíte completa:
33/33 (30→33). pnpm turbo run typecheck build (28/28). Testado ao vivo
através do proxy same-origin: anti-enumeração confirmada com curl
real, token gravado no Postgres, token bogus rejeitado (400).

Claude-Session: https://claude.ai/code/session_01BcWWuKfykGtUweXmHD6cKx

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

apps/api/src/auth/auth.controller.ts

@@ -7,6 +7,8 @@ import { LoginDto } from "./dto/login.dto.js";
 import { RefreshDto } from "./dto/refresh.dto.js";
 import { MfaChallengeDto } from "./dto/mfa-challenge.dto.js";
 import { MfaCodeDto } from "./dto/mfa-code.dto.js";
+import { ForgotPasswordDto } from "./dto/forgot-password.dto.js";
+import { ResetPasswordDto } from "./dto/reset-password.dto.js";
 import { JwtAuthGuard } from "./jwt-auth.guard.js";
 import { CurrentUser } from "./decorators/current-user.decorator.js";
 import type { EdenAuthenticatedUser } from "./jwt-auth.guard.js";
@@ -61,6 +63,21 @@ export class AuthController {
     await this.mfaService.disable(user.id, dto.code);
   }
 
+  @Post("forgot-password")
+  @HttpCode(200)
+  async forgotPassword(@Body() dto: ForgotPasswordDto, @Req() req: Request) {
+    await this.auth.forgotPassword(dto.email, requestContext(req));
+    // Always the same response regardless of whether the email is
+    // registered — anti-enumeration (eden.md §4.1), mirrors login.
+    return { message: "Se este e-mail estiver cadastrado, você receberá instruções para redefinir sua senha." };
+  }
+
+  @Post("reset-password")
+  @HttpCode(204)
+  async resetPassword(@Body() dto: ResetPasswordDto, @Req() req: Request) {
+    await this.auth.resetPassword(dto.token, dto.newPassword, requestContext(req));
+  }
+
   @Post("refresh")
   @HttpCode(200)
   async refresh(@Body() dto: RefreshDto, @Req() req: Request) {

apps/api/src/auth/auth.service.ts

@@ -1,5 +1,9 @@
-import { ForbiddenException, Injectable, UnauthorizedException } from "@nestjs/common";
+import { randomBytes, createHash } from "node:crypto";
+import { BadRequestException, ForbiddenException, Inject, Injectable, UnauthorizedException } from "@nestjs/common";
 import { usersRepo, sessionsRepo, auditRepo, type User } from "@eden/database";
+import { sendMail } from "@eden/integrations";
+import type { EdenEnv } from "@eden/config";
+import { EDEN_ENV } from "../config/config.constants.js";
 import { PasswordService } from "./password.service.js";
 import { TokenService } from "./token.service.js";
 import { MfaService } from "./mfa.service.js";
@@ -37,6 +41,11 @@ function toPublicUser(user: User): PublicUser {
 }
 
 const GENERIC_LOGIN_ERROR = "Credenciais inválidas";
+const RESET_TOKEN_TTL_MS = 60 * 60 * 1000; // 1h — deliberately short-lived (this token grants a password change)
+
+function hashResetToken(plaintext: string): string {
+  return createHash("sha256").update(plaintext).digest("hex");
+}
 
 @Injectable()
 export class AuthService {
@@ -44,6 +53,7 @@ export class AuthService {
     private readonly passwords: PasswordService,
     private readonly tokens: TokenService,
     private readonly mfa: MfaService,
+    @Inject(EDEN_ENV) private readonly env: EdenEnv,
   ) {}
 
   async login(
@@ -243,4 +253,71 @@ export class AuthService {
       user: toPublicUser(user),
     };
   }
+
+  /**
+   * Always resolves the same way whether or not the email is registered —
+   * same anti-enumeration discipline as login (eden.md §4.1). If the
+   * account exists (and is active), stages a reset token and emails a
+   * link; the mailer is fail-soft (packages/integrations), so a delivery
+   * failure never surfaces as an error here either.
+   */
+  async forgotPassword(email: string, ctx: RequestContext): Promise<void> {
+    const user = await usersRepo.findUserByEmail(email);
+    if (!user) return;
+
+    const plaintextToken = randomBytes(32).toString("hex");
+    const tokenHash = hashResetToken(plaintextToken);
+    const expiresAt = new Date(Date.now() + RESET_TOKEN_TTL_MS);
+    await usersRepo.setResetToken(user.id, tokenHash, expiresAt);
+
+    const resetUrl = `${this.env.PUBLIC_BASE_URL ?? "http://localhost:3001"}/reset-password?token=${plaintextToken}`;
+    await sendMail({
+      to: user.email,
+      subject: "EDEN — Redefinição de senha",
+      html: `
+        <p>Olá${user.full_name ? `, ${user.full_name}` : ""},</p>
+        <p>Recebemos um pedido para redefinir sua senha no EDEN. Se foi você, clique no link abaixo (válido por 1 hora):</p>
+        <p><a href="${resetUrl}">${resetUrl}</a></p>
+        <p>Se você não pediu essa redefinição, pode ignorar este e-mail — sua senha continua a mesma.</p>
+      `,
+    });
+
+    await auditRepo.appendAuditEvent({
+      actorType: "user",
+      actorId: user.id,
+      action: "auth.password_reset_requested",
+      resourceType: "user",
+      resourceId: user.id,
+      ipAddress: ctx.ipAddress,
+    });
+  }
+
+  /**
+   * Consumes a reset token issued by forgotPassword(). The token is
+   * cleared whether or not this call succeeds past validation, so a
+   * token can never be replayed — and every existing session is revoked
+   * (a password change invalidates any session that might have been
+   * established under the old, possibly-compromised credential).
+   */
+  async resetPassword(plaintextToken: string, newPassword: string, ctx: RequestContext): Promise<void> {
+    const tokenHash = hashResetToken(plaintextToken);
+    const user = await usersRepo.findUserByResetTokenHash(tokenHash);
+    if (!user) {
+      throw new BadRequestException("Token inválido ou expirado");
+    }
+
+    const { hash, algoVersion } = await this.passwords.hash(newPassword);
+    await usersRepo.updateUserPassword(user.id, hash, algoVersion);
+    await usersRepo.clearResetToken(user.id);
+    await sessionsRepo.revokeAllUserSessions(user.id);
+
+    await auditRepo.appendAuditEvent({
+      actorType: "user",
+      actorId: user.id,
+      action: "auth.password_reset_completed",
+      resourceType: "user",
+      resourceId: user.id,
+      ipAddress: ctx.ipAddress,
+    });
+  }
 }

apps/api/src/auth/dto/forgot-password.dto.ts

@@ -0,0 +1,6 @@
+import { IsEmail } from "class-validator";
+
+export class ForgotPasswordDto {
+  @IsEmail()
+  email!: string;
+}

apps/api/src/auth/dto/reset-password.dto.ts

@@ -0,0 +1,10 @@
+import { IsString, MinLength } from "class-validator";
+
+export class ResetPasswordDto {
+  @IsString()
+  token!: string;
+
+  @IsString()
+  @MinLength(8, { message: "A nova senha precisa ter ao menos 8 caracteres" })
+  newPassword!: string;
+}