docs: update installer CLAUDE.md to reflect SMTP removal

CLAUDE.md

@@ -25,11 +25,9 @@ The installer uses static docker-compose templates in `templates/`. Templates ar
 
 ## SMTP configuration
 
-The installer prompts for SMTP settings in SaaS mode when the user opts in ("Configure SMTP for email verification?"). SMTP is required for self-service sign-up — without it, only admin-created users can sign in.
+SMTP / email connector configuration has been moved from the installer to the SaaS vendor admin UI (Email Connector page at `/vendor/email`). The installer no longer prompts for or persists SMTP settings.
 
-Env vars: `SMTP_HOST`, `SMTP_PORT` (default 587), `SMTP_USER`, `SMTP_PASS`, `SMTP_FROM_EMAIL` (default `noreply@<PUBLIC_HOST>`). Passed to the `cameleer-logto` container. The bootstrap script discovers the SMTP connector factory and creates the connector with Cameleer-branded email templates.
-
-CLI args: `--smtp-host`, `--smtp-port`, `--smtp-user`, `--smtp-pass`, `--smtp-from-email`. Persisted in `cameleer.conf` for upgrades/reconfigure.
+Previously, SMTP env vars (`SMTP_HOST`, `SMTP_PORT`, `SMTP_USER`, `SMTP_PASS`, `SMTP_FROM_EMAIL`) were passed to the `cameleer-logto` container and configured via the bootstrap script. This one-shot approach was fragile — email delivery is now configured at runtime through the Logto Management API.
 
 ## Registry configuration
 
@@ -45,7 +43,6 @@ For private registries, pass `--registry-user` / `--registry-token`. The install
 - `CAMELEER_SERVER_*` — server config (consumed by cameleer-server)
 - `CAMELEER_SAAS_*` — SaaS management plane config
 - `CAMELEER_SAAS_PROVISIONING_*` — "SaaS forwards this to provisioned tenant servers"
-- `SMTP_*` — email delivery config for Logto (consumed by bootstrap, SaaS mode only)
 - No prefix (e.g. `POSTGRES_PASSWORD`, `PUBLIC_HOST`) — shared infrastructure, consumed by multiple components
 
 ## Development