Revert "Build post chat and attachment workflows"

This reverts commit 0b920da187.

.env.example

@@ -1,5 +1,5 @@
 APP_ENV=production
-APP_PUBLIC_URL=http://localhost:5173
+APP_PUBLIC_URL=https://app.example.com.br
 APP_TIMEZONE=America/Sao_Paulo
 HTTP_ADDR=:8080
 LOG_LEVEL=info
@@ -15,7 +15,7 @@ POSTGRES_PASSWORD=change-me-secure-password
 DATABASE_URL=postgres://mira:change-me-secure-password@postgres:5432/mira?sslmode=disable
 
 JWT_SECRET=change-me-with-a-long-random-secret
-JWT_ACCESS_TOKEN_TTL_MINUTES=480
+JWT_ACCESS_TOKEN_TTL_MINUTES=15
 JWT_REFRESH_TOKEN_TTL_DAYS=7
 
 CORS_ALLOWED_ORIGINS=https://app.example.com.br
@@ -25,15 +25,15 @@ CALENDAR_API_BASE_URL=https://brasilapi.com.br
 CALENDAR_API_KEY=
 CALENDAR_CACHE_TTL_HOURS=24
 
-SMTP_HOST=
-SMTP_PORT=
+SMTP_HOST=smtp.example.com.br
+SMTP_PORT=587
 SMTP_USER=
-SMTP_PASS=
-MAIL_FROM=
+SMTP_PASSWORD=
+SMTP_FROM_EMAIL=no-reply@example.com.br
 SMTP_FROM_NAME=Mira
 
 UPLOAD_MAX_SIZE_MB=10
-UPLOAD_ALLOWED_MIME_TYPES=image/jpeg,image/png,image/webp,application/pdf,application/msword,application/vnd.openxmlformats-officedocument.wordprocessingml.document
+UPLOAD_ALLOWED_MIME_TYPES=image/jpeg,image/png,image/webp,application/pdf
 STORAGE_DRIVER=local
 STORAGE_LOCAL_PATH=/var/lib/mira/uploads