app-email: smtp_mapping for vaultwarden + mealie

Vaultwarden via STARTTLS (accepts self-signed shim cert); Mealie via plaintext
(NONE) — no accept-invalid-cert option, spike-validated mode. Compose files
reference injected ${SMTP_*}. README documents the pattern.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

templates/mealie/docker-compose.yml

@@ -26,6 +26,15 @@ services:
       - MAX_WORKERS=1
       - WEB_CONCURRENCY=1
       - BASE_URL=https://${SUBDOMAIN}.${DOMAIN}
+      # App-email (managed relay). Injected by the controller only when app-email is on
+      # (global + per-app); empty SMTP_HOST = Mealie mail stays disabled. Mealie has no
+      # accept-invalid-cert option, so the relay uses plaintext (NONE) to the on-box shim —
+      # the spike-validated mode. See .felhom.yml smtp_mapping.
+      - SMTP_HOST=${SMTP_HOST:-}
+      - SMTP_PORT=${SMTP_PORT:-25}
+      - SMTP_AUTH_STRATEGY=${SMTP_AUTH_STRATEGY:-NONE}
+      - SMTP_FROM_NAME=${SMTP_FROM_NAME:-}
+      - SMTP_FROM_EMAIL=${SMTP_FROM_EMAIL:-}
     volumes:
       - mealie_data:/app/data/
     networks: