Fix SMTP From-address fallback rejection; catalog card icon order; doc corrections

Mail sending fell back to a hardcoded noreply@theta42.com From address when
smtp.from wasn't set, which authenticated relays reject with "Sender is not
same as SMTP authenticate username" since no relay authorized this account
to send as that address. Falls back to smtp.user first now.

Also: catalog card titles now read name-then-icon instead of icon-then-name,
and a handful of docs corrections found in an accuracy pass (configuration.md
missing the OpenBao/live-config layer, plugins.md undercounting plugin types,
vault.md describing OpenBao dev-mode/root-token access that doesn't reflect
the real production setup, orphaned discovery.md/vault.md pages linked in,
README's required-groups list missing app_sso_directory_admin).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0113gCdnfSCuZr6xvPDxTo3D

docs/vault.md

@@ -1,5 +1,13 @@
+---
+layout: default
+title: Vault Secrets
+description: OpenBao-backed personal, shared, and external-app secret storage built into the SSO Manager UI.
+---
+
 # Vault Secrets Management
 
+[← Back to Home](index.html)
+
 The Vault Secrets feature integrates with OpenBao to provide a secure key-value store for your environment. It allows you to store sensitive information like passwords, API keys, and credentials, ensuring they are encrypted and access-controlled.
 
 ## Usage
@@ -26,7 +34,14 @@ You can access the Vault UI from the application's top navigation bar.
 
 ### OpenBao Integration
 
-The secrets are stored in an OpenBao backend configured in development mode. The default KV (Key-Value) version 2 engine is mounted at `secret/`. The built-in UI uses the `/api/vault/secret/` API endpoints to interact with OpenBao.
+The secrets are stored in a real, initialized-and-unsealed OpenBao backend
+(`setup.sh` handles init/unseal on first run) — not OpenBao's ephemeral dev
+mode, which auto-unseals with an in-memory store and loses everything on
+restart. The default KV (Key-Value) version 2 engine is mounted at `secret/`.
+The built-in UI proxies through `/api/vault/secret/…`, authenticated the same
+way as the rest of the app (session cookie or a personal API token) — the
+server resolves your OpenBao access itself and injects the right scoped
+token; you never see or handle a raw OpenBao token as a UI user.
 
 ## Apps tab (admin)
 
@@ -48,9 +63,24 @@ The **Shared** tab lets you share a secret with another user (or app) without co
 
 ## API Access
 
-If you need to programmatically access the secrets, you can interact directly with the OpenBao API using the root token (in dev mode):
+To read your own secrets programmatically, call the `/api/vault` proxy with
+a [personal API token](concepts-api-tokens.html) — **not** a raw OpenBao
+token. The server authenticates the request, resolves your own scoped
+OpenBao access, and injects the real `X-Vault-Token` itself:
 
 ```bash
-# Example: Read a secret via the API
-curl -H "X-Vault-Token: root" -H "Authorization: Bearer <your-sso-token>" http://<your-sso-host>/api/vault/secret/data/<your-secret-path>
+# Example: Read a secret via the API (KV-v2, so the path includes /data/)
+curl -H "Authorization: Bearer sso_<id>_<secret>" \
+  https://<your-sso-host>/api/vault/secret/data/<your-secret-path>
 ```
+
+An **external app** reading its own config uses the scoped token minted for
+it on the **Apps** tab instead of a personal token — see *Apps tab (admin)*
+above for how that token is minted and what it's confined to.
+
+Using the OpenBao **root token** directly (bypassing the SSO entirely) is
+never the intended path for day-to-day secret access — it's an
+operator/maintenance credential (seeding, disaster recovery), kept in
+`setup.env` and never passed to a service container. See
+[theta-env's Secrets doc](https://theta42.github.io/theta-env/secrets.html)
+for the full token/policy model.