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/.felhom.yml

@@ -62,3 +62,18 @@ healthcheck:
   checks:
     - type: tcp
       port: 9000
+
+# --- App-email mapping (apps → in-controller shim → hub → Resend) ---
+# When app-email is on (global toggle + this app's per-app toggle), the controller injects
+# host = the on-box shim, port = 2525, From = mealie@felhom.eu. Mealie has NO accept-invalid-
+# cert option, so it talks PLAINTEXT (SMTP_AUTH_STRATEGY=NONE) to the shim on 2525 — the
+# spike-validated mode (SPIKE-smtp-app-relay-2026-06-28 §7). SMTP_USER/SMTP_PASSWORD stay
+# unset (no auth needed; the shim holds no Resend key).
+smtp_mapping:
+  host_var: SMTP_HOST
+  port_var: SMTP_PORT
+  security_var: SMTP_AUTH_STRATEGY
+  security_value: "NONE"
+  from_var: SMTP_FROM_EMAIL
+  from_name_var: SMTP_FROM_NAME
+  from_local: mealie