feat(debyltech-cloud): add cloud.debyltech.com Nextcloud

A de Byl Technologies LLC Nextcloud cloned from the Skudak instance:
LibreSign signing for people without an account, registration off
(admin-created accounts only), no Group Folders. DNS is a terraform-managed
ALIAS to fulfillr.debyltech.com.

- containers/debyltech/cloud.yml: nextcloud/mariadb/redis on port 8091.
  It installs unattended on the first deploy, sends mail through SES as
  noreply@debyltech.com, and re-asserts the Skudak LibreSign settings.
- files/debyltechmail: skudakmail rebranded, with a new black-and-white
  wordmark and white web-UI logos.
- LibreSign is pinned to 14.2.2 from the GitHub release (sha256-checked)
  rather than `occ app:install`. The app store served a same-day 14.2.3
  whose tarball has no binary-signature metadata. 14.2.x also doesn't
  create its own download dirs, so they're pre-created.
- The backup runs nightly at 04:15 to TrueNAS /mnt/glacier/debyltechcloud and
  reaches personal iDrive via the "iDrive E2 Backup" task; the TrueNAS side
  excludes /debyltechcloud/_backup/config/**.
- Fix the libresign:configure:check gate in both instances: '\berror\b'
  becomes a backspace in Jinja and never matched, so a check reporting three
  errors passed clean. Now '\\berror\\b'.
- vault: cloud_debyltech_* secrets.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CLAUDE.md

@@ -60,7 +60,7 @@ ansible/
 Containers are organized in `ansible/roles/podman/tasks/containers/`:
 - `base/` - Core infrastructure containers (Caddy web server, AWS DDNS)
 - `home/` - Home-specific services (Home Assistant, PartKeepr, Immich photos, Nextcloud, Redis)
-- `debyltech/` - Personal/business services (Fulfillr)
+- `debyltech/` - Personal/business services (Fulfillr, Nextcloud at cloud.debyltech.com - cloned from the Skudak instance, backs up to personal iDrive via TrueNAS)
 - `skudak/` - Additional services (BookStack wiki, Nextcloud)
 
 ### Security Model

ansible/roles/podman/README.md

@@ -39,9 +39,13 @@ before you need it, and record the date you last did.
 
 Dumps live on the host at `/var/backups/nextcloud/<name>/db/<name>-YYYYMMDD.sql.gz`
 and on TrueNAS at `<remote_path>/_backup/db/`. TrueNAS in turn cloud-syncs
-`/mnt/glacier/skudakcloud` to Skudak's own iDrive e2 bucket, so a third copy
+each dataset offsite, so a third copy exists there — but restoring from it
-exists there — but restoring from it means going through the TrueNAS console,
+means going through the TrueNAS console, not this host:
-not this host.
+
+| Dataset | Offsite |
+|---|---|
+| `skudakcloud`, `skudakapps`, `skudakgit` | Skudak's own iDrive e2 bucket (excluded from the personal task) |
+| `nextcloud`, `gitea`, `debyltechcloud` | Personal iDrive e2 bucket, via the "iDrive E2 Backup" task over `/mnt/glacier` |
 
 Verify the dump before trusting it:
 
@@ -102,23 +106,25 @@ The signing CA lives in the data tree at
 brings it back with everything else. After restoring, confirm it:
 
 ```bash
-sudo -H -u podman bash -c 'cd; podman exec -u www-data skudak-cloud php occ libresign:configure:check'
+sudo -H -u podman bash -c 'cd; podman exec -u www-data <skudak-cloud|debyltech-cloud> php occ libresign:configure:check'
 ```
 
 Every check must report `success`. If `openssl-configure` reports an error, the
 `certificate_engine` / `config_path` app config is pointing somewhere without a
-CA — see the guarded generate task in `tasks/containers/skudak/cloud.yml`.
+CA — see the guarded generate task in `tasks/containers/{skudak,debyltech}/cloud.yml`.
 **Do not** simply re-run `libresign:configure:openssl` on a restored instance
 without understanding why: it mints a *new* root CA and invalidates the trust
 chain on every document already signed under the old one.
 
 ## LibreSign
 
-Deployed on `skudak-cloud` only. LibreSign 14.1.0 requires Nextcloud server
+Deployed on `skudak-cloud` and `debyltech-cloud`. LibreSign 14.1.0 requires
-`>=34.0.0,<35.0.0`, which the pinned `nextcloud:34.0.2-apache` satisfies. If the
+Nextcloud server `>=34.0.0,<35.0.0`, which the pinned `nextcloud:34.0.3-apache`
-Nextcloud tag is bumped to 35, LibreSign must be held or upgraded in step — the
+satisfies. If the Nextcloud tag is bumped to 35, LibreSign must be held or
-two instances are pinned independently in `tasks/main.yml`, so `skudak-cloud`
+upgraded in step — each instance is pinned independently in `tasks/main.yml`,
-can lag `cloud` if needed.
+so the LibreSign instances can lag `cloud` if needed. The branding apps
+(`files/skudakmail`, `files/debyltechmail`) pin `max-version="34"` too and
+must be bumped alongside.
 
 Dependency split, which drives what survives a container recreate:
 

ansible/roles/podman/defaults/main.yml

@@ -5,6 +5,7 @@ bookstack_path: "{{ podman_volumes }}/bookstack"
 cam2ip_path: "{{ podman_volumes }}/cam2ip"
 cloud_path: "{{ podman_volumes }}/cloud"
 cloud_skudak_path: "{{ podman_volumes }}/skudakcloud"
+cloud_debyltech_path: "{{ podman_volumes }}/debyltechcloud"
 debyltech_path: "{{ podman_volumes }}/debyltech"
 # drone_path: removed - Drone CI decommissioned
 factorio_path: "{{ podman_volumes }}/factorio"
@@ -218,6 +219,29 @@ libresign_skudak_cert_c: US
 libresign_skudak_cert_st: New Hampshire
 libresign_skudak_cert_l: Newbury
 
+# de Byl Technologies Nextcloud (containers/debyltech/cloud.yml). DNS is a
+# Route53 ALIAS to fulfillr.debyltech.com, managed in ~/src/debyltech/terraform
+# (aws/cloud.tf), so no awsddns container of its own.
+cloud_debyltech_server_name: cloud.debyltech.com
+# debyltech-com $primary-color (copper). Drives the web UI theming; the mail
+# CTA carries the same value as a constant in files/debyltechmail.
+theming_debyltech_primary: "#bc804d"
+# Login/header background. Dark site ink rather than copper so the white
+# wordmark and mark shipped in files/debyltechmail/img stay legible on it.
+theming_debyltech_background: "#0a1a2b"
+# LibreSign root CA identity: the issuer on every signed document. Same caveat
+# as the Skudak block above -- changing these does not re-issue the CA.
+libresign_debyltech_cert_cn: de Byl Technologies LLC
+libresign_debyltech_cert_o: de Byl Technologies LLC
+libresign_debyltech_cert_c: US
+libresign_debyltech_cert_st: New Hampshire
+libresign_debyltech_cert_l: Newbury
+# Outbound mail via AWS SES SMTP as noreply@debyltech.com. The IAM user is
+# NextcloudSMTP in the terraform repo; its SMTP username/password are
+# cloud_debyltech_smtp_user / cloud_debyltech_smtp_pass in the vault.
+cloud_debyltech_smtp_host: email-smtp.us-east-1.amazonaws.com
+cloud_debyltech_smtp_port: 465
+
 
 # Legacy nginx/ModSecurity configuration removed - Caddy provides built-in security
 
@@ -284,6 +308,7 @@ caddy_log_names:
   - graylog
   - cloud
   - cloud-skudak
+  - cloud-debyltech
   - gitea-debyl
   - gitea-skudak
   - fulfillr

ansible/roles/podman/files/debyltechmail/appinfo/info.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0"?>
+<info xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      xsi:noNamespaceSchemaLocation="https://apps.nextcloud.com/schema/apps/info.xsd">
+    <id>debyltechmail</id>
+    <name>de Byl Tech Customisations</name>
+    <summary>de Byl Technologies-branded email templates and UI overrides for Nextcloud and LibreSign</summary>
+    <description><![CDATA[
+Restyles outgoing Nextcloud and LibreSign mail to match the de Byl
+Technologies brand (~/src/debyltech/debyltech-com). Cloned from the Skudak
+instance's skudakmail app. Two supported extension points, no core
+patch and no LibreSign fork:
+
+1. `OCA\Debyltechmail\Mail\DebyltechEMailTemplate` extends Nextcloud's EMailTemplate
+   and is wired in via the `mail_template_class` system config value, which
+   Nextcloud checks in `lib/private/Mail/Mailer.php::createEMailTemplate()`.
+   It owns layout, typography, subject rewriting, button labels and the
+   footer LibreSign never adds.
+
+2. `OCA\Debyltechmail\Listener\DebyltechMailListener` listens on
+   `OCP\Mail\Events\BeforeMessageSent` to embed the wordmark as an inline
+   (cid:) MIME part, so the logo survives the remote-image blocking that
+   Apple Mail, Gmail and Outlook apply by default. This cannot be done from
+   the template class, which has no reference to the message.
+
+3. `OCA\Debyltechmail\Listener\DebyltechStyleListener` listens on
+   `OCP\AppFramework\Http\Events\BeforeTemplateRenderedEvent` and adds
+   css/libresign-mobile.css, which fixes the LibreSign public signing page
+   being clipped at the bottom on iOS Safari. Serving it from here rather
+   than patching LibreSign keeps the app's integrity signature intact and
+   survives app updates, which wipe the app directory.
+
+The app has no routes, no UI, no settings and no database tables. The id
+`debyltechmail` is referenced by the `mail_template_class` system config;
+its scope is instance-wide customisation, not mail alone.
+    ]]></description>
+    <version>1.0.0</version>
+    <licence>agpl</licence>
+    <author>de Byl Technologies LLC</author>
+    <namespace>Debyltechmail</namespace>
+    <category>customization</category>
+    <dependencies>
+        <nextcloud min-version="34" max-version="34"/>
+    </dependencies>
+</info>

ansible/roles/podman/files/debyltechmail/css/libresign-mobile.css

@@ -0,0 +1,40 @@
+/*
+ * Mobile fix for the LibreSign public signing page.
+ *
+ * PROBLEM: src/ExternalApp.vue sets `height: 100vh` on `html body #content`
+ * and again on `#app-sidebar` under `@media (max-width: 512px)`. iOS Safari
+ * resolves 100vh against the LARGE viewport -- as though the browser chrome
+ * were hidden -- so the element extends behind the bottom toolbar and the
+ * signing action bar is clipped off-screen. The built `external` chunk uses
+ * 100vh seven times and dvh/svh/safe-area zero times.
+ *
+ * WHY NOT safe-area-inset: the page's viewport meta is
+ * `width=device-width, initial-scale=1.0, minimum-scale=1.0` with no
+ * `viewport-fit=cover`, so env(safe-area-inset-bottom) resolves to 0 here.
+ *
+ * WHY dvh: the dynamic viewport unit tracks the chrome as it shows and hides,
+ * which is exactly the behaviour wanted. Browsers without dvh support drop the
+ * declaration entirely and keep LibreSign's own 100vh -- so this degrades to
+ * today's behaviour rather than to something broken. No @supports needed.
+ *
+ * SCOPING IS LOad-BEARING. `#content` and `#app-sidebar` are Nextcloud-wide
+ * IDs used throughout the authenticated UI. Every rule below is scoped to
+ * `#body-public` + `.app-public`, which the public signing page sets:
+ *     <body id="body-public" class="layout-base">
+ *     <div id="content" class="app-public" role="main">
+ * Widening these selectors would restyle the whole instance.
+ *
+ * UPSTREAM: patched at source in src/ExternalApp.vue (lines 34 and 46) and
+ * submitted to LibreSign. Once that lands and this instance runs a release
+ * containing it, this file can be deleted.
+ */
+
+#body-public #content.app-public {
+	height: 100dvh;
+}
+
+@media (max-width: 512px) {
+	#body-public #app-sidebar {
+		height: 100dvh;
+	}
+}

ansible/roles/podman/files/debyltechmail/lib/AppInfo/Application.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\Debyltechmail\AppInfo;
+
+use OCA\Debyltechmail\Listener\DebyltechMailListener;
+use OCA\Debyltechmail\Listener\DebyltechStyleListener;
+use OCP\AppFramework\App;
+use OCP\AppFramework\Bootstrap\IBootContext;
+use OCP\AppFramework\Bootstrap\IBootstrap;
+use OCP\AppFramework\Bootstrap\IRegistrationContext;
+use OCP\AppFramework\Http\Events\BeforeTemplateRenderedEvent;
+use OCP\Mail\Events\BeforeMessageSent;
+
+class Application extends App implements IBootstrap {
+	public const APP_ID = 'debyltechmail';
+
+	public function __construct(array $urlParams = []) {
+		parent::__construct(self::APP_ID, $urlParams);
+	}
+
+	public function register(IRegistrationContext $context): void {
+		// BeforeMessageSent fires in Mailer::send() (lib/private/Mail/Mailer.php:186),
+		// AFTER useTemplate() has flattened the template into subject/plain/html on
+		// the message, and BEFORE setRecipients() and the Symfony transport. That
+		// window is the only place an inline (cid:) logo can be attached -- see the
+		// listener for why the template class alone cannot do it.
+		$context->registerEventListener(BeforeMessageSent::class, DebyltechMailListener::class);
+
+		// BeforeTemplateRenderedEvent is dispatched from
+		// lib/private/AppFramework/Middleware/AdditionalScriptsMiddleware.php:35 and
+		// lib/private/Template/TemplateManager.php:82 -- the latter covers public
+		// (unauthenticated) pages, which is the case that matters here since the
+		// LibreSign signing page is a #[PublicPage].
+		$context->registerEventListener(BeforeTemplateRenderedEvent::class, DebyltechStyleListener::class);
+	}
+
+	public function boot(IBootContext $context): void {
+	}
+}

ansible/roles/podman/files/debyltechmail/lib/Listener/DebyltechMailListener.php

@@ -0,0 +1,121 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Embeds the de Byl Technologies wordmark as an inline (cid:) MIME part.
+ *
+ * WHY A LISTENER AND NOT THE TEMPLATE CLASS: Apple Mail, Gmail and Outlook all
+ * block remote images by default, and Apple Mail draws its own placeholder box
+ * rather than styled alt text -- so no amount of styling in the HTML rescues a
+ * remote <img>. The fix is a cid: reference backed by an inline MIME part, and
+ * that part must be attached to the MESSAGE. An IEMailTemplate subclass has no
+ * reference to the message, so it physically cannot do this; the template emits
+ * the <img>, this listener supplies the bytes and rewrites the src.
+ *
+ * BeforeMessageSent is the sanctioned hook -- "Emitted before a system mail is
+ * sent. It can be used to alter the message." (lib/public/Mail/Events/
+ * BeforeMessageSent.php). It fires at lib/private/Mail/Mailer.php:186, after
+ * useTemplate() has already rendered subject/plain/html onto the message and
+ * before setRecipients() and the transport, so a body rewrite here takes
+ * effect. No core patch, no LibreSign fork.
+ *
+ * FAILURE POSTURE: every step is defensive. If the asset is missing, the body
+ * is not ours, or anything throws, the listener leaves the message untouched
+ * and mail still goes out with a remote <img> -- degraded, never blocked. Mail
+ * that carries signature requests must not fail to send because branding
+ * broke.
+ */
+
+namespace OCA\Debyltechmail\Listener;
+
+use OC\Mail\Message;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Mail\Events\BeforeMessageSent;
+use Psr\Log\LoggerInterface;
+
+/** @template-implements IEventListener<BeforeMessageSent> */
+class DebyltechMailListener implements IEventListener {
+	/** Must match DebyltechEMailTemplate::LOGO_PATH. */
+	private const LOGO_PATH_FRAGMENT = '/custom_apps/debyltechmail/img/debyltech-wordmark.png';
+
+	/** Content-ID. Symfony emits this as <debyltech-wordmark.png>. */
+	private const CID = 'debyltech-wordmark.png';
+
+	public function __construct(
+		private LoggerInterface $logger,
+	) {
+	}
+
+	public function handle(Event $event): void {
+		if (!$event instanceof BeforeMessageSent) {
+			return;
+		}
+
+		try {
+			$this->embedWordmark($event->getMessage());
+		} catch (\Throwable $e) {
+			// Never let branding break delivery of a signature request.
+			$this->logger->warning('debyltechmail: inline logo embed skipped', [
+				'exception' => $e,
+			]);
+		}
+	}
+
+	private function embedWordmark(\OCP\Mail\IMessage $message): void {
+		// Mailer::send() guards `instanceof Message` before dispatching this
+		// event, so the concrete type is guaranteed -- but getSymfonyEmail()
+		// is not on the interface, so narrow explicitly rather than assume.
+		if (!$message instanceof Message) {
+			return;
+		}
+
+		$email = $message->getSymfonyEmail();
+		$html = $email->getHtmlBody();
+		if (!is_string($html) || $html === '') {
+			return;
+		}
+
+		// Only touch mail that actually renders our wordmark. Anything else --
+		// password resets, share notifications, other apps -- passes through.
+		if (!str_contains($html, self::LOGO_PATH_FRAGMENT)) {
+			return;
+		}
+
+		$asset = $this->assetPath();
+		if ($asset === null) {
+			return;
+		}
+
+		$bytes = @file_get_contents($asset);
+		if ($bytes === false || $bytes === '') {
+			return;
+		}
+
+		// Rewrite the absolute URL to a cid: reference. Matched on the path
+		// fragment with an optional query string so a cachebuster or a change
+		// of host still resolves.
+		$rewritten = preg_replace(
+			'#https?://[^"\']*' . preg_quote(self::LOGO_PATH_FRAGMENT, '#') . '(\?[^"\']*)?#',
+			'cid:' . self::CID,
+			$html,
+		);
+
+		if (!is_string($rewritten) || $rewritten === $html) {
+			return;
+		}
+
+		$email->embed($bytes, self::CID, 'image/png');
+		$message->setHtmlBody($rewritten);
+	}
+
+	/**
+	 * Resolves img/debyltech-wordmark.png relative to this file, so the app works
+	 * from whatever apps directory Nextcloud has it in.
+	 */
+	private function assetPath(): ?string {
+		$path = dirname(__DIR__, 2) . '/img/debyltech-wordmark.png';
+		return is_readable($path) ? $path : null;
+	}
+}

ansible/roles/podman/files/debyltechmail/lib/Listener/DebyltechStyleListener.php

@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Injects de Byl Tech's CSS overrides into rendered Nextcloud pages.
+ *
+ * Currently one override: the LibreSign public signing page clips its bottom
+ * action bar on iOS Safari, because ExternalApp.vue sizes #content to 100vh and
+ * Safari resolves that against the large viewport (chrome hidden). See
+ * css/libresign-mobile.css for the full reasoning.
+ *
+ * WHY A LISTENER RATHER THAN PATCHING LIBRESIGN: an app-store app carries
+ * appinfo/signature.json, so editing a single byte of it raises INVALID_HASH in
+ * the admin security check, and an app update wipes the directory outright
+ * (Installer::downloadApp() calls Files::rmdirr on it). A stylesheet served
+ * from our own app survives both, and survives Nextcloud upgrades.
+ *
+ * The stylesheet itself is tightly scoped to #body-public / .app-public. This
+ * listener is deliberately NOT scoped further -- adding a stylesheet is
+ * idempotent and cheap, and gating on which app is rendering would couple this
+ * to LibreSign's route structure for no benefit. The CSS decides where it
+ * applies; this only decides that it is available.
+ */
+
+namespace OCA\Debyltechmail\Listener;
+
+use OCA\Debyltechmail\AppInfo\Application;
+use OCP\AppFramework\Http\Events\BeforeTemplateRenderedEvent;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Util;
+
+/** @template-implements IEventListener<BeforeTemplateRenderedEvent> */
+class DebyltechStyleListener implements IEventListener {
+	public function handle(Event $event): void {
+		if (!$event instanceof BeforeTemplateRenderedEvent) {
+			return;
+		}
+
+		// Never let a styling concern break page rendering. A signing page that
+		// loads unstyled is recoverable; one that 500s is not.
+		try {
+			Util::addStyle(Application::APP_ID, 'libresign-mobile');
+		} catch (\Throwable $e) {
+			// Intentionally swallowed -- no logger dependency is worth adding
+			// for a stylesheet, and a failure here has no user-visible effect
+			// beyond the override not applying.
+		}
+	}
+}

ansible/roles/podman/files/debyltechmail/lib/Mail/DebyltechEMailTemplate.php

@@ -0,0 +1,421 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * de Byl Technologies-branded email template. Cloned from the Skudak
+ * instance's skudakmail app (roles/podman/files/skudakmail); keep fixes to
+ * the shared mechanics in sync between the two.
+ *
+ * Wired in via the `mail_template_class` system config value, which Nextcloud
+ * checks in lib/private/Mail/Mailer.php::createEMailTemplate(). That is a
+ * supported extension point -- core is not patched, so Nextcloud upgrades do
+ * not clobber this.
+ *
+ * WHY THIS EXISTS AT ALL: LibreSign's outgoing mail is generic open-source
+ * boilerplate -- subject "LibreSign: There is a file for you to sign", heading
+ * "File to sign", button "Sign »filename«", and NO footer whatsoever (it never
+ * calls addFooter(); verified: zero hits for addFooter in custom_apps/libresign).
+ * That mail carries customer agreements to signers, so it needs to read as an
+ * official de Byl Technologies LLC communication.
+ *
+ * DESIGN INTENT (palette from ~/src/debyltech/debyltech-com, theme
+ * assets/scss/_variables.scss):
+ *   - Light ground, near-black text, NO coloured header band, and a pure
+ *     black-and-white wordmark. Transactional mail from Stripe/Linear/DocuSign
+ *     is likewise restrained, and a band leaves an ugly empty slab when the
+ *     logo is blocked (see LOGO note).
+ *   - $primary-color copper #bc804d on the CTA button only -- the one place
+ *     this template spends colour.
+ *   - Open Sans, matching the site's $primary-font, with the stock stack as
+ *     fallback.
+ *
+ * LOGO: served from this app's own img/ directory rather than the theming app.
+ * Two reasons. (1) The theming logo is white-on-transparent because the web UI
+ * and login page are dark; a white mark is invisible on this template's white
+ * ground. (2) Decoupling means restyling mail can never disturb the web UI.
+ * /custom_apps/<app>/img/<file> is served publicly without auth (verified).
+ *
+ * Note that remote images are blocked by default in Apple Mail, Gmail and
+ * Outlook, and Apple Mail renders its own placeholder box rather than styled
+ * alt text -- so alt styling cannot rescue it. Surviving that requires a CID
+ * inline part via IMessage::attachInline(), which lives on the MESSAGE and is
+ * unreachable from a template subclass. Mitigated instead by dropping the
+ * band: a blocked logo now leaves plain white space, not a black slab.
+ *
+ * IMPLEMENTATION NOTE: font restyling is done by string-substitution against
+ * the PARENT's own markup rather than by redefining it. Those properties are
+ * large inline-CSS blobs with positional sprintf placeholders; copying them
+ * wholesale would mean re-auditing every placeholder on every upgrade, and a
+ * mismatch renders broken mail. Substitution degrades safely -- if upstream
+ * changes markup the replacements no-op and mail still sends, just unstyled.
+ * The header IS replaced wholesale, deliberately, because "no band" cannot be
+ * expressed as a substitution; its placeholder order is documented at its
+ * definition and must be kept in sync with upstream.
+ */
+
+namespace OCA\Debyltechmail\Mail;
+
+use OC\Mail\EMailTemplate;
+
+class DebyltechEMailTemplate extends EMailTemplate {
+	/** Stock Nextcloud font stack, replaced wholesale. Must match exactly. */
+	private const STOCK_FONTS = "-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif";
+
+	/** $primary-font, with the stock stack retained as fallback. */
+	private const BRAND_FONTS = "'Open Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif";
+
+	private const ACCENT = '#BC804D';       // $primary-color (copper)
+	private const ON_ACCENT = '#FFFFFF';
+	private const INK = '#0A0A0A';
+	private const MUTED = '#525252';
+	private const FAINT = '#A3A3A3';
+	private const RULE = '#E5E5E5';
+
+	private const ENTITY = 'de Byl Technologies LLC';
+	private const SITE = 'https://debyltech.com';
+	private const LOGO_PATH = '/custom_apps/debyltechmail/img/debyltech-wordmark.png';
+
+	/** Displayed width in px. The asset is 600px wide for retina. */
+	private const LOGO_DISPLAY_WIDTH = 190;
+
+	/**
+	 * LibreSign's l10n wraps document names in German guillemets -- "Sign
+	 * »contract«" -- regardless of locale. Mapped to US curly quotes, matching
+	 * the ``...'' convention in the LaTeX document templates.
+	 */
+	private const QUOTE_MAP = ['»' => "\u{201C}", '«' => "\u{201D}"];
+
+	/**
+	 * LibreSign subject -> de Byl Tech subject. Keys are the exact English msgids
+	 * from custom_apps/libresign/lib/Service/MailService.php (lines 51, 87,
+	 * 121, 150, 172). Anything unmatched passes through untouched, so an
+	 * upstream string change degrades to the original subject rather than a
+	 * blank one.
+	 */
+	private const SUBJECT_MAP = [
+		'LibreSign: There is a file for you to sign' => 'Document for your signature',
+		'LibreSign: Changes into a file for you to sign' => 'Updated document for your signature',
+		'LibreSign: A file has been signed' => 'A document has been signed',
+		'LibreSign: A signature request has been canceled' => 'Signature request cancelled',
+		'LibreSign: Code to sign file' => 'Your signing verification code',
+	];
+
+	/**
+	 * LibreSign heading -> de Byl Tech heading. Exact English msgids from
+	 * MailService.php lines 53/89, 123, 152.
+	 */
+	private const HEADING_MAP = [
+		'File to sign' => 'Review and sign',
+		'File signed' => 'Document signed',
+		'Signature request canceled' => 'Signature request cancelled',
+	];
+
+	/**
+	 * LibreSign body copy -> de Byl Tech body copy (MailService.php lines 60, 96,
+	 * 174). Only the strings with NO %s interpolation are mapped; the two that
+	 * carry a name or filename (lines 125, 154) arrive already substituted and
+	 * so cannot be matched exactly -- they pass through unchanged.
+	 */
+	private const BODY_MAP = [
+		'There is a document for you to sign. Access the link below:'
+			=> 'de Byl Technologies LLC has sent you a document that requires your signature. Review it and sign using the link below.',
+		'Changes have been made in a file that you have to sign. Access the link below:'
+			=> 'A document awaiting your signature has been updated by de Byl Technologies LLC. Review the current version and sign using the link below.',
+		'Use this code to sign the document:'
+			=> 'Use this verification code to complete your signature:',
+	];
+
+	/**
+	 * Template properties carrying the font stack. Listed explicitly rather
+	 * than discovered reflectively so an upstream rename fails loudly in
+	 * testing instead of silently skipping a block.
+	 */
+	private const STYLED_PARTS = [
+		'head', 'tail', 'heading', 'bodyBegin', 'bodyText',
+		'listBegin', 'listItem', 'listEnd', 'buttonGroup', 'button',
+		'bodyEnd', 'footer',
+	];
+
+	/**
+	 * Own flag, deliberately NOT the parent's $footerAdded.
+	 *
+	 * Message::useTemplate() (lib/private/Mail/Message.php:289-296) calls
+	 * renderText() at :291 BEFORE renderHtml() at :293, and renderText() sets
+	 * $footerAdded = true. Guarding footer injection on !$footerAdded therefore
+	 * never fires on the real send path -- the footer silently vanished from
+	 * every mail while a renderHtml()-only test passed. Both renderers below
+	 * call inject() and this flag makes the second call inert.
+	 */
+	private bool $brandFooterInjected = false;
+
+	public function __construct(
+		\OCP\Defaults $themingDefaults,
+		\OCP\IURLGenerator $urlGenerator,
+		\OCP\L10N\IFactory $l10nFactory,
+		?int $logoWidth,
+		?int $logoHeight,
+		string $emailId,
+		array $data,
+	) {
+		$this->applyBrandStyling();
+
+		// Must run AFTER the substitutions: the parent constructor copies
+		// $this->head into $htmlBody as its first act, so restyling head
+		// afterwards would leave the already-emitted copy untouched.
+		parent::__construct(
+			$themingDefaults,
+			$urlGenerator,
+			$l10nFactory,
+			$logoWidth,
+			$logoHeight,
+			$emailId,
+			$data,
+		);
+	}
+
+	private function applyBrandStyling(): void {
+		foreach (self::STYLED_PARTS as $part) {
+			if (!property_exists($this, $part)) {
+				continue;
+			}
+			$this->$part = str_replace(self::STOCK_FONTS, self::BRAND_FONTS, $this->$part);
+		}
+
+		// Light, tightly tracked headings, carried over from the Skudak template.
+		$this->heading = str_replace(
+			'font-size:24px;font-weight:400',
+			'font-size:26px;font-weight:300;letter-spacing:-0.02em',
+			$this->heading,
+		);
+	}
+
+	/**
+	 * Rewrites LibreSign's subjects. Called by LibreSign on the TEMPLATE
+	 * (MailService.php:51 etc.), not on the message, which is what makes this
+	 * interceptable at all -- Message::useTemplate() later pulls the result via
+	 * renderSubject(). Prefixed with the entity so the sender is unambiguous in
+	 * an inbox list.
+	 */
+	public function setSubject(string $subject): void {
+		$mapped = self::SUBJECT_MAP[$subject] ?? null;
+		parent::setSubject(
+			$mapped === null ? $subject : self::ENTITY . ' — ' . $mapped,
+		);
+	}
+
+	/**
+	 * Replaces the stock header wholesale: no coloured band, wordmark centred
+	 * on white.
+	 *
+	 * Does NOT use the parent's $header property or its placeholder order --
+	 * this is independent markup, so upstream changes to $header cannot break
+	 * it (and equally cannot improve it). $logoWidth/$logoHeight from the
+	 * Mailer are ignored on purpose: they are clamped to MAX_LOGO_SIZE = 105
+	 * (lib/private/Mail/Mailer.php:60), which is too small for a wordmark to
+	 * be legible.
+	 */
+	public function addHeader(): void {
+		if ($this->headerAdded) {
+			return;
+		}
+		$this->headerAdded = true;
+
+		$logoUrl = $this->urlGenerator->getAbsoluteURL(self::LOGO_PATH);
+		$alt = htmlspecialchars(self::ENTITY, ENT_QUOTES, 'UTF-8');
+		$w = self::LOGO_DISPLAY_WIDTH;
+		$fonts = self::BRAND_FONTS;
+		$ink = self::INK;
+
+		$this->htmlBody .= <<<HTML
+<table align="center" style="border-collapse:collapse;border-spacing:0;margin:0 auto;padding:0;text-align:left;vertical-align:top;width:100%">
+	<tbody><tr style="padding:0;text-align:left;vertical-align:top">
+		<td align="center" style="border-collapse:collapse!important;margin:0;padding:40px 30px 28px 30px;text-align:center;vertical-align:top">
+			<img src="{$logoUrl}" alt="{$alt}" width="{$w}" style="-ms-interpolation-mode:bicubic;border:0;clear:both;display:block;margin:0 auto;outline:0;text-decoration:none;width:{$w}px;max-width:{$w}px;height:auto;color:{$ink};font-family:{$fonts};font-size:22px;font-weight:300;letter-spacing:-0.02em"/>
+		</td>
+	</tr></tbody>
+</table>
+HTML;
+	}
+
+	/**
+	 * Both renderers inject the footer -- see $brandFooterInjected.
+	 *
+	 * Mirrors the parent's own guard structure (renderHtml at
+	 * lib/private/Mail/EMailTemplate.php:643, renderText at :656): close the
+	 * body, append $tail, flip $footerAdded. The brand block goes in before
+	 * $tail.
+	 */
+	public function renderHtml(): string {
+		$this->injectBrandFooter();
+		return parent::renderHtml();
+	}
+
+	public function renderText(): string {
+		$this->injectBrandFooter();
+		return parent::renderText();
+	}
+
+	private function injectBrandFooter(): void {
+		if ($this->brandFooterInjected || $this->footerAdded) {
+			return;
+		}
+		$this->brandFooterInjected = true;
+
+		// Close the body ourselves so the footer lands INSIDE the layout
+		// rather than after it. The parent's render methods are then a no-op
+		// for body closing and only append $tail.
+		$this->ensureBodyIsClosed();
+		$this->htmlBody .= $this->brandFooterHtml();
+		$this->plainBody .= $this->brandFooterText();
+	}
+
+	private function brandFooterHtml(): string {
+		$year = date('Y');
+		$entity = htmlspecialchars(self::ENTITY, ENT_QUOTES, 'UTF-8');
+		$fonts = self::BRAND_FONTS;
+		$site = self::SITE;
+		[$muted, $faint, $rule, $ink] = [self::MUTED, self::FAINT, self::RULE, self::INK];
+
+		// Table-based and fully inline-styled: <style> blocks, flex and grid
+		// are stripped or unsupported across Outlook and most webmail.
+		return <<<HTML
+<table align="center" style="border-collapse:collapse;border-spacing:0;margin:0 auto;padding:0;text-align:left;vertical-align:top;width:100%">
+	<tbody><tr style="padding:0;text-align:left;vertical-align:top">
+		<td align="center" style="border-collapse:collapse!important;margin:0;padding:0 30px 44px 30px;text-align:center;vertical-align:top">
+			<table align="center" style="border-collapse:collapse;border-spacing:0;margin:0 auto;padding:0;text-align:center;width:100%;max-width:550px">
+				<tbody>
+				<tr><td style="border-collapse:collapse!important;border-top:1px solid {$rule};font-size:0;line-height:0;height:1px;margin:0;padding:0">&#xA0;</td></tr>
+				<tr><td align="center" style="border-collapse:collapse!important;color:{$muted};font-family:{$fonts};font-size:13px;font-weight:400;line-height:1.6;margin:0;padding:22px 0 0 0;text-align:center">
+					This is an official document-signing request from <strong style="color:{$ink};font-weight:600">{$entity}</strong>.<br/>
+					Nothing is signed unless you open the document and complete it yourself. If you were not expecting this, you can safely ignore it.
+				</td></tr>
+				<tr><td align="center" style="border-collapse:collapse!important;color:{$muted};font-family:{$fonts};font-size:13px;font-weight:400;line-height:1.6;margin:0;padding:16px 0 0 0;text-align:center">
+					<a href="{$site}/legal/privacy" style="color:{$muted};text-decoration:underline">Privacy Policy</a>
+					&#160;&#183;&#160;
+					<a href="{$site}/legal/tos" style="color:{$muted};text-decoration:underline">Terms of Use</a>
+					&#160;&#183;&#160;
+					<a href="{$site}" style="color:{$muted};text-decoration:underline">debyltech.com</a>
+				</td></tr>
+				<tr><td align="center" style="border-collapse:collapse!important;color:{$faint};font-family:{$fonts};font-size:12px;font-weight:400;line-height:1.6;margin:0;padding:16px 0 0 0;text-align:center">
+					&copy; {$year} {$entity}. All rights reserved.<br/>
+					Automated message &mdash; please do not reply to this address.
+				</td></tr>
+				</tbody>
+			</table>
+		</td>
+	</tr></tbody>
+</table>
+HTML;
+	}
+
+	private function brandFooterText(): string {
+		$year = date('Y');
+		$entity = self::ENTITY;
+		$site = self::SITE;
+
+		return <<<TEXT
+
+--
+This is an official document-signing request from {$entity}.
+Nothing is signed unless you open the document and complete it yourself.
+If you were not expecting this, you can safely ignore it.
+
+Privacy Policy: {$site}/legal/privacy
+Terms of Use:   {$site}/legal/tos
+
+© {$year} {$entity}. All rights reserved.
+Automated message — please do not reply to this address.
+
+TEXT;
+	}
+
+	private function tidyQuotes(string $text): string {
+		return strtr($text, self::QUOTE_MAP);
+	}
+
+	// Signatures below mirror the parent EXACTLY. $plainTitle/$plainText are
+	// deliberately untyped there (they accept string|bool -- false suppresses
+	// the plain-text variant), and narrowing a parameter type in an override
+	// is a fatal error in PHP.
+	public function addHeading(string $title, $plainTitle = ''): void {
+		$mapped = self::HEADING_MAP[$title] ?? $this->tidyQuotes($title);
+		parent::addHeading(
+			$mapped,
+			is_string($plainTitle) && $plainTitle !== ''
+				? (self::HEADING_MAP[$plainTitle] ?? $this->tidyQuotes($plainTitle))
+				: $plainTitle,
+		);
+	}
+
+	public function addBodyText(string $text, $plainText = ''): void {
+		$mapped = self::BODY_MAP[$text] ?? $this->tidyQuotes($text);
+		parent::addBodyText(
+			$mapped,
+			is_string($plainText) && $plainText !== ''
+				? (self::BODY_MAP[$plainText] ?? $this->tidyQuotes($plainText))
+				: $plainText,
+		);
+	}
+
+	/**
+	 * Reimplemented for two reasons: the accent colour, and a fixed label.
+	 *
+	 * LibreSign builds "Sign »%s«" with the raw filename
+	 * (MailService.php:64,100). Real documents here are named things like
+	 * acme-master-services-agreement-rev3, which makes an ungainly button and
+	 * leaks the document name to anyone who sees the inbox preview. Replaced
+	 * with a fixed call to action; the document is identified on the landing
+	 * page behind the link.
+	 *
+	 * Mirrors the parent's vsprintf argument order exactly:
+	 * [$color, $color, $url, $color, $textColor, $textColor, $text].
+	 * Kept in sync with parent::addBodyButton() -- if that changes upstream,
+	 * this needs revisiting.
+	 */
+	public function addBodyButton(string $text, string $url, $plainText = ''): void {
+		if ($this->footerAdded) {
+			return;
+		}
+
+		$this->ensureBodyIsOpened();
+		$this->ensureBodyListClosed();
+
+		$label = $this->buttonLabelFor($text);
+		if ($plainText === '') {
+			$plainText = $label;
+		} elseif (is_string($plainText)) {
+			$plainText = $this->tidyQuotes($plainText);
+		}
+
+		$this->htmlBody .= vsprintf($this->button, [
+			self::ACCENT,
+			self::ACCENT,
+			$url,
+			self::ACCENT,
+			self::ON_ACCENT,
+			self::ON_ACCENT,
+			htmlspecialchars($label, ENT_QUOTES, 'UTF-8'),
+		]);
+
+		if ($plainText !== false) {
+			$this->plainBody .= $plainText . ': ';
+		}
+		$this->plainBody .= $url . PHP_EOL;
+	}
+
+	/**
+	 * Maps LibreSign's filename-bearing labels onto fixed calls to action.
+	 * Matched on the stable leading verb rather than the whole string, since
+	 * the tail is a filename. Unknown labels pass through with quotes tidied.
+	 */
+	private function buttonLabelFor(string $text): string {
+		if (str_starts_with($text, 'Sign ')) {
+			return 'Review document';
+		}
+		if (str_starts_with($text, 'View signed file')) {
+			return 'View signed document';
+		}
+		return $this->tidyQuotes($text);
+	}
+}

ansible/roles/podman/tasks/containers/debyltech/cloud.yml

@@ -0,0 +1,615 @@
+---
+# de Byl Technologies Nextcloud (cloud.debyltech.com).
+#
+# Cloned from containers/skudak/cloud.yml, which carries the full reasoning for
+# nearly every task below -- read the matching comment there before changing
+# one here. Comments in this file cover only where the two instances differ.
+#
+# Differences from Skudak, by design:
+#   - Fresh install: NEXTCLOUD_ADMIN_* makes the first deploy install
+#     unattended, and LibreSign is installed from the app store rather than
+#     assumed present.
+#   - No Group Folders. Registration stays off, matching Skudak's live state:
+#     every account, staff and customer alike, is created by the admin, with
+#     customers in per-customer groups.
+#   - Outbound mail is AWS SES SMTP (noreply@debyltech.com), set here via occ
+#     so it lives in git rather than only in the admin UI.
+#   - Backups go to personal iDrive e2 via TrueNAS -- see the backup include
+#     at the bottom.
+- name: create required debyltech cloud volumes
+  become: true
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: directory
+    owner: "{{ podman_subuid.stdout }}"
+    group: "{{ podman_subuid.stdout }}"
+    mode: 0755
+  notify: restorecon podman
+  loop:
+    - "{{ cloud_debyltech_path }}/apps"
+    - "{{ cloud_debyltech_path }}/config"
+    - "{{ cloud_debyltech_path }}/data"
+    - "{{ cloud_debyltech_path }}/mysql"
+    - "{{ cloud_debyltech_path }}/scripts"
+    - "{{ cloud_debyltech_path }}/redis"
+
+- name: unshare chown the debyltech cloud volumes
+  become: true
+  become_user: "{{ podman_user }}"
+  changed_when: false
+  ansible.builtin.command: |
+    podman unshare chown -R 33:33 {{ cloud_debyltech_path }}/apps {{ cloud_debyltech_path }}/data {{ cloud_debyltech_path }}/config
+
+- name: flush handlers
+  ansible.builtin.meta: flush_handlers
+
+- import_tasks: podman/podman-check.yml
+  vars:
+    container_name: debyltech-cloud-db
+    container_image: "{{ db_image }}"
+
+- name: create debyltech-cloud-db container
+  become: true
+  become_user: "{{ podman_user }}"
+  containers.podman.podman_container:
+    name: debyltech-cloud-db
+    image: "{{ db_image }}"
+    restart_policy: on-failure:3
+    log_driver: journald
+    network:
+      - shared
+    env:
+      MYSQL_ROOT_PASSWORD: "{{ cloud_debyltech_db_root_pass }}"
+      MYSQL_DATABASE: dtcloud
+      MYSQL_PASSWORD: "{{ cloud_debyltech_db_pass }}"
+      MYSQL_USER: dtcloud
+    volumes:
+      - "{{ cloud_debyltech_path }}/mysql:/var/lib/mysql"
+
+- name: create systemd startup job for debyltech-cloud-db
+  include_tasks: podman/systemd-generate.yml
+  vars:
+    container_name: debyltech-cloud-db
+
+# ---------------------------------------------------------------------------
+# Redis: distributed cache + file locking. MUST exist before debyltech-cloud
+# below -- see the Skudak equivalent for why.
+- name: template debyltech cloud redis config
+  become: true
+  ansible.builtin.template:
+    src: nextcloud/redis-debyltech.conf.j2
+    dest: "{{ cloud_debyltech_path }}/redis/redis.conf"
+    owner: "{{ podman_subuid.stdout }}"
+    group: "{{ podman_subuid.stdout }}"
+    mode: 0640
+  notify: restorecon podman
+  no_log: true
+
+- name: flush handlers
+  ansible.builtin.meta: flush_handlers
+
+- name: unshare chown the debyltech redis config to the redis uid
+  become: true
+  become_user: "{{ podman_user }}"
+  changed_when: false
+  ansible.builtin.command: >
+    podman unshare chown 999:1000 {{ cloud_debyltech_path }}/redis/redis.conf
+
+- import_tasks: podman/podman-check.yml
+  vars:
+    container_name: debyltech-cloud-redis
+    container_image: "{{ redis_image }}"
+
+- name: create debyltech-cloud-redis container
+  become: true
+  become_user: "{{ podman_user }}"
+  containers.podman.podman_container:
+    name: debyltech-cloud-redis
+    image: "{{ redis_image }}"
+    restart_policy: on-failure:3
+    log_driver: journald
+    network:
+      - shared
+    volumes:
+      - "{{ cloud_debyltech_path }}/redis/redis.conf:/etc/redis/redis.conf:ro"
+    command: redis-server /etc/redis/redis.conf
+
+- name: create systemd startup job for debyltech-cloud-redis
+  include_tasks: podman/systemd-generate.yml
+  vars:
+    container_name: debyltech-cloud-redis
+
+- import_tasks: podman/podman-check.yml
+  vars:
+    container_name: debyltech-cloud
+    container_image: "{{ image }}"
+
+- name: create debyltech cloud container
+  become: true
+  become_user: "{{ podman_user }}"
+  containers.podman.podman_container:
+    name: debyltech-cloud
+    image: "{{ image }}"
+    restart_policy: on-failure:3
+    log_driver: journald
+    network:
+      - shared
+    env:
+      MYSQL_PASSWORD: "{{ cloud_debyltech_db_pass }}"
+      MYSQL_DATABASE: dtcloud
+      MYSQL_HOST: debyltech-cloud-db
+      MYSQL_USER: dtcloud
+      # Read by the entrypoint ONLY on first start against an empty config
+      # volume, to run the install unattended; ignored on every start after.
+      NEXTCLOUD_ADMIN_USER: admin
+      NEXTCLOUD_ADMIN_PASSWORD: "{{ cloud_debyltech_admin_pass }}"
+      NEXTCLOUD_TRUSTED_DOMAINS: "{{ cloud_debyltech_server_name }}"
+      PHP_MEMORY_LIMIT: 1024M
+      PHP_UPLOAD_LIMIT: 512M
+      LC_ALL: C.UTF-8
+      LANG: C.UTF-8
+      REDIS_HOST: debyltech-cloud-redis
+      REDIS_HOST_PORT: "6379"
+      REDIS_HOST_PASSWORD: "{{ cloud_debyltech_redis_pass }}"
+    volumes:
+      - "{{ cloud_debyltech_path }}/apps:/var/www/html/custom_apps"
+      - "{{ cloud_debyltech_path }}/data:/var/www/html/data"
+      - "{{ cloud_debyltech_path }}/config:/var/www/html/config"
+    ports:
+      - "8091:80"
+
+- name: create systemd startup job for debyltech-cloud
+  include_tasks: podman/systemd-generate.yml
+  vars:
+    container_name: debyltech-cloud
+
+# ---------------------------------------------------------------------------
+# LibreSign
+- name: install libresign runtime dependencies in debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command:
+    cmd: >
+      podman exec -u 0 debyltech-cloud
+      sh -c "apt-get update && apt-get install -y --no-install-recommends
+      poppler-utils ghostscript && rm -rf /var/lib/apt/lists/*"
+  register: libresign_deps
+  changed_when: "'is already the newest version' not in libresign_deps.stdout"
+
+# On the FIRST deploy this also waits out the unattended install, which takes
+# noticeably longer than a restart -- hence the larger budget than Skudak's.
+- name: wait for nextcloud to be ready in debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ status --output=json
+  register: debyltech_occ_ready
+  # String match, not from_json: before the install finishes occ can print a
+  # plain-text warning ahead of the JSON, and a parse error would abort the
+  # retry loop instead of waiting. Skudak's bare 'installed' check would also
+  # match "installed":false, which is exactly the state being waited out here.
+  until: >-
+    debyltech_occ_ready.rc == 0
+    and '"installed":true' in debyltech_occ_ready.stdout
+  retries: 60
+  delay: 5
+  changed_when: false
+
+# LibreSign is PINNED (libresign_version / libresign_sha256 in tasks/main.yml)
+# and installed from the upstream GitHub release, NOT `occ app:install`, which
+# always takes whatever the app store has that day. On 2026-09-28 that was a
+# same-day 14.2.3 whose tarball shipped without appinfo/install-*.json -- the
+# maintainer-signed metadata LibreSign verifies its java/pdftk/jsignpdf
+# downloads against -- so configure:check failed all three on a clean install.
+#
+# Upgrading: bump both pins together (the sha256 is on the GitHub release
+# asset) and deploy; the tree is replaced and `occ upgrade` runs the app's
+# migrations. Downgrading is refused below: Nextcloud does not support it, and
+# the only way back is removing the app, which discards its config and CA.
+- name: read installed libresign version in debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ config:app:get libresign installed_version
+  register: libresign_installed
+  changed_when: false
+  failed_when: false
+
+- name: refuse to downgrade libresign in debyltech-cloud
+  ansible.builtin.fail:
+    msg: >-
+      LibreSign {{ libresign_installed.stdout }} is installed but the pin is
+      {{ libresign_version }}. Nextcloud cannot downgrade an app in place --
+      raise the pin, or remove the app deliberately if nothing has been signed.
+  when:
+    - libresign_installed.rc == 0
+    - libresign_installed.stdout is version(libresign_version, '>')
+
+- name: install pinned libresign release in debyltech-cloud
+  when: libresign_installed.rc != 0 or libresign_installed.stdout != libresign_version
+  block:
+    - name: fetch pinned libresign release
+      become: true
+      ansible.builtin.get_url:
+        url: "https://github.com/LibreSign/libresign/releases/download/v{{ libresign_version }}/libresign-v{{ libresign_version }}.tar.gz"
+        dest: "{{ cloud_debyltech_path }}/scripts/libresign-v{{ libresign_version }}.tar.gz"
+        checksum: "sha256:{{ libresign_sha256 }}"
+        mode: 0644
+
+    - name: remove previous libresign app tree
+      become: true
+      ansible.builtin.file:
+        path: "{{ cloud_debyltech_path }}/apps/libresign"
+        state: absent
+
+    - name: unpack pinned libresign release into custom_apps
+      become: true
+      ansible.builtin.unarchive:
+        src: "{{ cloud_debyltech_path }}/scripts/libresign-v{{ libresign_version }}.tar.gz"
+        dest: "{{ cloud_debyltech_path }}/apps/"
+        remote_src: true
+        # Unpacked as root the files keep the tarball's owners, which lie
+        # outside the podman user's subuid range, so the unshare chown below
+        # is refused. Same two-step as the debyltechmail copy.
+        owner: "{{ podman_subuid.stdout }}"
+        group: "{{ podman_subuid.stdout }}"
+      notify: restorecon podman
+
+    - name: unshare chown the libresign app tree
+      become: true
+      become_user: "{{ podman_user }}"
+      changed_when: false
+      ansible.builtin.command: >
+        podman unshare chown -R 33:33 {{ cloud_debyltech_path }}/apps/libresign
+
+    - name: flush handlers
+      ansible.builtin.meta: flush_handlers
+
+    # Only an in-place upgrade needs this; a first install is handled by the
+    # app:enable below.
+    - name: run libresign migrations in debyltech-cloud
+      become: true
+      become_user: "{{ podman_user }}"
+      ansible.builtin.command: >
+        podman exec -u www-data debyltech-cloud php occ upgrade
+      when: libresign_installed.rc == 0
+
+- name: ensure libresign app is enabled in debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ app:enable libresign
+  register: libresign_enable
+  changed_when: "'already enabled' not in libresign_enable.stdout"
+
+# 14.2.x's downloader does not create its own target directories: on a fresh
+# appdata every java/pdftk download fails with "Directory ... does not exist
+# for sink value". Creating them first is harmless once they exist.
+- name: pre-create libresign binary directories in debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  changed_when: false
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud sh -c
+    'd=$(ls -d /var/www/html/data/appdata_*/libresign) &&
+    mkdir -p "$d/x86_64/linux/java" "$d/x86_64/pdftk"'
+
+# "Finished with success" is printed even when every download failed, so this
+# check only catches the command itself falling over. The real gate is the
+# configure:check verify task below, which hashes each binary against the
+# release's signed metadata.
+- name: install libresign java/pdftk/jsignpdf binaries in debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ libresign:install --java --pdftk --jsignpdf
+  register: libresign_install
+  changed_when: false
+  failed_when: "'Finished with success' not in libresign_install.stdout"
+
+- name: check whether libresign root certificate is configured
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ libresign:configure:check --certificate
+  register: libresign_cert_check
+  changed_when: false
+  failed_when: false
+
+# Guarded: re-running would mint a new root CA and orphan every certificate
+# already issued. No --ou -- see skudak/cloud.yml.
+- name: generate libresign root certificate for debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ libresign:configure:openssl
+    --cn="{{ libresign_debyltech_cert_cn }}"
+    -o "{{ libresign_debyltech_cert_o }}"
+    -c "{{ libresign_debyltech_cert_c }}"
+    -s "{{ libresign_debyltech_cert_st }}"
+    -l "{{ libresign_debyltech_cert_l }}"
+  when: "'error' in libresign_cert_check.stdout"
+  changed_when: true
+
+# Signers are mostly customers WITHOUT an account, reached by emailed
+# invitation; the ID-document gate would leave them unable to sign at all.
+- name: relax libresign identification-document gate in debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ config:app:set libresign identification_documents --value=0
+  register: libresign_ident
+  changed_when: "'is now set to' in libresign_ident.stdout"
+
+# Must be exactly GRAPHIC_ONLY -- see skudak/cloud.yml.
+- name: use signature-only stamp in debyltech-cloud libresign
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ config:app:set libresign signature_render_mode --value=GRAPHIC_ONLY
+  register: libresign_render
+  changed_when: "'is now set to' in libresign_render.stdout"
+
+# Lets account-owned emails be added as signers. NEVER set the _email variant
+# of this key to 'no' -- see skudak/cloud.yml.
+- name: allow account-owned emails as libresign signers in debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ config:app:set core
+    shareapi_restrict_user_enumeration_full_match --value=no
+  register: debyltech_enum_fullmatch
+  changed_when: "'is now set to' in debyltech_enum_fullmatch.stdout"
+
+- name: drop libresign validation QR code from signed-PDF footer in debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ config:app:set libresign write_qrcode_on_footer
+    --value=0 --type=boolean
+  register: libresign_qr
+  changed_when: "'is now set to' in libresign_qr.stdout"
+
+- name: verify libresign configuration in debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ libresign:configure:check
+  register: libresign_verify
+  changed_when: false
+  # Double backslashes: Jinja unescapes string literals, so a single '\b'
+  # becomes a BACKSPACE character and this could never match -- which is
+  # how a check reporting three errors passed clean on 2026-09-28.
+  failed_when: libresign_verify.stdout is search('\\berror\\b')
+
+# ---------------------------------------------------------------------------
+# Background jobs. A fresh install defaults to AJAX mode, which only runs jobs
+# while someone has the web UI open -- LibreSign's queued signature mail and
+# every cleanup job would stall. The cloud-cron timer included below drives
+# cron.php; this tells Nextcloud to expect it.
+- name: set debyltech-cloud background jobs to cron
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ config:app:set core backgroundjobs_mode --value=cron
+  register: debyltech_bgjobs
+  changed_when: "'is now set to' in debyltech_bgjobs.stdout"
+
+- name: disable nextcloud signup link in debyltech-cloud config
+  become: true
+  ansible.builtin.lineinfile:
+    path: "{{ cloud_debyltech_path }}/config/config.php"
+    regexp: "^\\s*'simpleSignUpLink\\.shown'\\s*=>"
+    line: "  'simpleSignUpLink.shown' => false,"
+    insertbefore: '^\);'
+    create: false
+
+# ---------------------------------------------------------------------------
+# Branding: debyltechmail, cloned from skudakmail. custom_apps is a persisted
+# bind mount, so only enabling and config need reasserting.
+# Owned directly by the HOST uid that rootless podman maps www-data (33) to --
+# subuid start + 32, since container uid 1 is the first subuid. Skudak copies
+# as the subuid and then `podman unshare chown`s, which flips ownership back
+# and forth so the copy reports changed on every run; here that would also
+# re-import the theming logos below every time.
+- name: deploy debyltechmail email-template app to debyltech-cloud
+  become: true
+  ansible.builtin.copy:
+    src: debyltechmail/
+    dest: "{{ cloud_debyltech_path }}/apps/debyltechmail/"
+    owner: "{{ podman_subuid.stdout | int + 32 }}"
+    group: "{{ podman_subuid.stdout | int + 32 }}"
+    mode: 0644
+    directory_mode: 0755
+  register: debyltechmail_copy
+  notify: restorecon podman
+
+- name: enable debyltechmail app in debyltech-cloud
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud php occ app:enable debyltechmail
+  register: debyltechmail_enable
+  changed_when: "'already enabled' not in debyltechmail_enable.stdout"
+
+# System config, set only when it differs so a clean re-deploy reports no
+# changes (Skudak's equivalents report changed on every run). Values are
+# single-quoted into the shell, so the backslashes in mail_template_class pass
+# through literally. overwrite.cli.url is what LibreSign invitation links and
+# mail asset URLs are built from when sent by a background job.
+- name: set debyltech-cloud system config
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.shell: |
+    set -o pipefail
+    occ() { podman exec -u www-data debyltech-cloud php occ "$@"; }
+    cur=$(occ config:system:get {{ item.k }} || true)
+    if [ "$cur" != {{ item.v | quote }} ]; then
+      occ config:system:set {{ item.k }} --value={{ item.v | quote }} --type={{ item.t | default('string') }} >/dev/null
+      echo CHANGED
+    fi
+  args:
+    executable: /bin/bash
+  register: debyltech_sysconfig
+  changed_when: "'CHANGED' in debyltech_sysconfig.stdout"
+  loop:
+    - {k: overwrite.cli.url, v: "https://{{ cloud_debyltech_server_name }}"}
+    - {k: overwriteprotocol, v: https}
+    - {k: loglevel, v: "2", t: integer}
+    - {k: log_rotate_size, v: "10485760", t: integer}
+    - {k: mail_template_class, v: "OCA\\Debyltechmail\\Mail\\DebyltechEMailTemplate"}
+    - {k: mail_smtpmode, v: smtp}
+    - {k: mail_smtphost, v: "{{ cloud_debyltech_smtp_host }}"}
+    - {k: mail_smtpport, v: "{{ cloud_debyltech_smtp_port }}", t: integer}
+    - {k: mail_smtpsecure, v: ssl}
+    - {k: mail_smtpauth, v: "true", t: boolean}
+    - {k: mail_from_address, v: noreply}
+    - {k: mail_domain, v: debyltech.com}
+  loop_control:
+    label: "{{ item.k }}"
+
+- name: set debyltech-cloud SES SMTP credentials
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.shell: |
+    set -o pipefail
+    occ() { podman exec -u www-data debyltech-cloud php occ "$@"; }
+    cur=$(occ config:system:get {{ item.k }} || true)
+    if [ "$cur" != {{ item.v | quote }} ]; then
+      occ config:system:set {{ item.k }} --value={{ item.v | quote }} >/dev/null
+      echo CHANGED
+    fi
+  args:
+    executable: /bin/bash
+  register: debyltech_smtp_creds
+  changed_when: "'CHANGED' in debyltech_smtp_creds.stdout"
+  loop:
+    - {k: mail_smtpname, v: "{{ cloud_debyltech_smtp_user }}"}
+    - {k: mail_smtppassword, v: "{{ cloud_debyltech_smtp_pass }}"}
+  loop_control:
+    label: "{{ item.k }}"
+  no_log: true
+
+# Compared first: theming:config prints "Updated" even when nothing changed.
+- name: set debyltech-cloud theming
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.shell: |
+    set -o pipefail
+    occ() { podman exec -u www-data debyltech-cloud php occ "$@"; }
+    cur=$(occ config:app:get theming {{ item.k }} || true)
+    if [ "$cur" != {{ item.v | quote }} ]; then
+      occ theming:config {{ item.k }} {{ item.v | quote }} >/dev/null
+      echo CHANGED
+    fi
+  args:
+    executable: /bin/bash
+  loop:
+    - {k: name, v: "de Byl Technologies"}
+    - {k: slogan, v: "Hardware, firmware and design services"}
+    - {k: url, v: "https://debyltech.com"}
+    - {k: primary_color, v: "{{ theming_debyltech_primary }}"}
+    - {k: background_color, v: "{{ theming_debyltech_background }}"}
+  register: debyltech_theming
+  changed_when: "'CHANGED' in debyltech_theming.stdout"
+  loop_control:
+    label: "{{ item.k }}"
+
+# The web UI logos ship inside the debyltechmail app (the white variants; the
+# ink wordmark is the mail one). theming:config re-imports the file on every
+# call, so it runs only when the app's files changed or no logo is set yet.
+# `logo` is the wide wordmark on the login page; `logoheader` is the square
+# mark in the top bar, where a wordmark would shrink to illegibility.
+- name: check debyltech-cloud theming logos
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud
+    php occ config:app:get theming {{ item }}Mime
+  loop: [logo, logoheader]
+  register: debyltech_logo_mime
+  changed_when: false
+  failed_when: false
+
+- name: set debyltech-cloud theming logos
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.command: >
+    podman exec -u www-data debyltech-cloud php occ theming:config {{ item.item }}
+    /var/www/html/custom_apps/debyltechmail/img/{{ logo_files[item.item] }}
+  loop: "{{ debyltech_logo_mime.results }}"
+  when: debyltechmail_copy is changed or item.rc != 0 or item.stdout == ''
+  vars:
+    logo_files:
+      logo: debyltech-wordmark-white.png
+      logoheader: debyltech-mark-white.png
+  loop_control:
+    label: "{{ item.item }}"
+
+# Fails the play if branding, the LibreSign settings above, or Redis locking
+# have silently regressed -- see skudak/cloud.yml.
+- name: template debyltechmail verification script
+  become: true
+  ansible.builtin.template:
+    src: nextcloud/debyltechmail-verify.php.j2
+    dest: "{{ cloud_debyltech_path }}/scripts/debyltechmail-verify.php"
+    owner: "{{ podman_subuid.stdout }}"
+    group: "{{ podman_subuid.stdout }}"
+    mode: 0644
+  notify: restorecon podman
+
+- name: verify debyltech mail branding is live
+  become: true
+  become_user: "{{ podman_user }}"
+  ansible.builtin.shell: >
+    set -o pipefail;
+    podman exec -i -u www-data debyltech-cloud php
+    < {{ cloud_debyltech_path }}/scripts/debyltechmail-verify.php
+  args:
+    executable: /bin/bash
+  register: debyltechmail_verify
+  changed_when: false
+
+- include_tasks: containers/cloud-cron.yml
+  vars:
+    cron_name: debyltech-cloud
+    cron_container: debyltech-cloud
+    cron_script_path: /usr/local/bin/debyltech-cloud-cron.sh
+
+# BUSINESS data that DELIBERATELY reaches personal storage -- the opposite of
+# Skudak, and on purpose: de Byl Technologies LLC is the owner's own company.
+#
+# Chain: this rsync -> TrueNAS /mnt/glacier/debyltechcloud (05:00 ZFS
+# snapshot) -> the personal "iDrive E2 Backup" cloud-sync task, which pushes
+# /mnt/glacier to the personal iDrive e2 bucket. Unlike /skudakcloud/**,
+# /skudakapps/** and /skudakgit/**, there is NO exclude for /debyltechcloud/**
+# on that task, and there must not be one -- that inclusion IS the offsite
+# copy. If that ever changes, give it its own cloud-sync task first.
+- include_tasks: containers/cloud-backup.yml
+  vars:
+    backup_name: debyltech-cloud
+    data_path: "{{ cloud_debyltech_path }}/data"
+    config_path: "{{ cloud_debyltech_path }}/config"
+    db_container: debyltech-cloud-db
+    ssh_key_path: /etc/ssh/backup_keys/debyltech-cloud
+    ssh_key_content: "{{ cloud_debyltech_backup_ssh_key }}"
+    ssh_user: debyltechcloud
+    remote_path: /mnt/glacier/debyltechcloud
+    script_path: /usr/local/bin/debyltech-cloud-backup.sh
+    # data/ is mode 770 here too; see skudak/cloud.yml.
+    backup_rsync_extra_args: "--chmod=Du=rwx,Dgo=rx"
+    # Between the 04:00 personal and 04:30 Skudak runs, before the 05:00
+    # TrueNAS snapshot.
+    backup_oncalendar: "*-*-* 04:15:00"

ansible/roles/podman/tasks/containers/skudak/cloud.yml

@@ -405,7 +405,10 @@
     php occ libresign:configure:check
   register: libresign_verify
   changed_when: false
-  failed_when: libresign_verify.stdout is search('\berror\b')
+  # Double backslashes: Jinja unescapes string literals, so a single '\b'
+  # becomes a BACKSPACE character and this could never match -- which is
+  # how a check reporting three errors passed clean on 2026-09-28.
+  failed_when: libresign_verify.stdout is search('\\berror\\b')
 
 - name: disable nextcloud signup link in config
   become: true

ansible/roles/podman/tasks/main.yml

@@ -79,6 +79,22 @@
     image: docker.io/library/nextcloud:34.0.3-apache
   tags: skudak, skudak-cloud
 
+# cloud.debyltech.com -- cloned from the Skudak instance above; keep the two
+# image pins in step. DNS is a terraform-managed ALIAS (see defaults).
+- import_tasks: containers/debyltech/cloud.yml
+  vars:
+    db_image: docker.io/library/mariadb:10.6
+    # Fully qualified on purpose: podman records `docker.io/library/redis`, and
+    # podman-check compares names literally, so the short `docker.io/redis`
+    # form (as in the Skudak block above) recreates redis on every deploy.
+    redis_image: docker.io/library/redis:8.2-alpine
+    image: docker.io/library/nextcloud:34.0.3-apache
+    # GitHub release asset + its sha256 -- see the pinned-install comment in
+    # the task file for why this is not left to the app store.
+    libresign_version: "14.2.2"
+    libresign_sha256: 8655a4c89f52ca7eaf542d0764d07a7732cb23b39906e7246b37e569ec7a6579
+  tags: debyltech, debyltech-cloud
+
 - import_tasks: containers/debyltech/fulfillr.yml
   vars:
     image: git.debyl.io/debyltech/fulfillr:20260915.0011

ansible/roles/podman/templates/caddy/Caddyfile.j2

@@ -457,6 +457,38 @@
 	}
 }
 
+# de Byl Tech Nextcloud - {{ cloud_debyltech_server_name }}
+{{ cloud_debyltech_server_name }} {
+	request_body {
+		max_size {{ caddy_max_request_body_mb }}MB
+	}
+
+	reverse_proxy localhost:8091 {
+		header_up Host {host}
+		header_up X-Real-IP {remote}
+	}
+
+	header {
+		Strict-Transport-Security "max-age=31536000; includeSubDomains"
+		X-Content-Type-Options "nosniff"
+		Referrer-Policy "same-origin"
+		-X-Powered-By
+	}
+
+	# Nextcloud specific redirects
+	redir /.well-known/carddav /remote.php/dav 301
+	redir /.well-known/caldav /remote.php/dav 301
+
+	log {
+		output file /var/log/caddy/cloud-debyltech.log {
+			roll_size {{ caddy_log_roll_size }}
+			roll_keep {{ caddy_log_roll_keep }}
+			roll_keep_for {{ caddy_log_roll_keep_for }}
+		}
+		format json
+	}
+}
+
 # Gitea - {{ gitea_debyl_server_name }}
 {{ gitea_debyl_server_name }} {
 	import common_headers

ansible/roles/podman/templates/nextcloud/debyltechmail-verify.php.j2

@@ -0,0 +1,186 @@
+<?php
+/**
+ * {{ ansible_managed }}
+ *
+ * Post-deploy assertion that de Byl Tech mail branding is actually live.
+ *
+ * WHY THIS EXISTS: DebyltechEMailTemplate extends OC\Mail\EMailTemplate, which is
+ * Nextcloud's PRIVATE namespace -- no API stability guarantee. Two things can
+ * silently switch the branding off:
+ *
+ *   1. A Nextcloud major upgrade. appinfo/info.xml pins max-version, so the app
+ *      is auto-disabled as incompatible; Mailer::createEMailTemplate() then
+ *      fails its class_exists() check and falls back to the stock template.
+ *      Mail still sends -- unbranded. That is the right failure mode, but it is
+ *      invisible without this check.
+ *   2. An upstream change to the private base class breaking an override.
+ *
+ * Renders through Message::useTemplate() -- the REAL path -- rather than
+ * calling renderHtml() directly. That distinction is not academic: renderText()
+ * runs first and flips the parent's footerAdded flag, and a renderHtml()-only
+ * test once passed green while live mail shipped with no footer at all.
+ *
+ * Exits non-zero with a diagnostic on any failure, so the Ansible task fails
+ * the play rather than reporting a clean deploy over broken branding.
+ */
+
+require_once '/var/www/html/lib/base.php';
+
+$mailer = \OC::$server->get(\OCP\Mail\IMailer::class);
+$dispatcher = \OC::$server->get(\OCP\EventDispatcher\IEventDispatcher::class);
+
+// Mirrors MailService::notifyUnsignedUser() (custom_apps/libresign/lib/Service/MailService.php:85-116).
+$template = $mailer->createEMailTemplate('settings.TestEmail');
+$template->setSubject('LibreSign: There is a file for you to sign');
+$template->addHeader();
+$template->addHeading('File to sign', false);
+$template->addBodyText('There is a document for you to sign. Access the link below:');
+$template->addBodyButton('Sign »verify.pdf«', 'https://{{ cloud_debyltech_server_name }}/verify');
+
+$message = $mailer->createMessage();
+$message->setTo(['verify@example.invalid' => 'Verify']);
+$message->useTemplate($template);
+
+// What Mailer::send() does at lib/private/Mail/Mailer.php:186. Nothing is sent.
+$dispatcher->dispatchTyped(new \OCP\Mail\Events\BeforeMessageSent($message));
+
+$html = $message->getSymfonyEmail()->getHtmlBody() ?? '';
+$text = $message->getPlainBody();
+$subject = $message->getSubject();
+
+$inlineNames = [];
+foreach ($message->getSymfonyEmail()->getAttachments() as $part) {
+	$inlineNames[] = (string)$part->getFilename();
+}
+
+$failures = [];
+
+if (!$template instanceof \OCA\Debyltechmail\Mail\DebyltechEMailTemplate) {
+	$failures[] = 'template class is ' . get_class($template)
+		. ' -- expected DebyltechEMailTemplate. Is the debyltechmail app enabled, and does '
+		. 'appinfo/info.xml still allow this Nextcloud major?';
+}
+if (!str_starts_with($subject, 'de Byl Technologies LLC')) {
+	$failures[] = 'subject not rewritten: ' . $subject;
+}
+if (!str_contains($html, 'official document-signing request')) {
+	$failures[] = 'HTML footer missing (renderText/renderHtml ordering regression?)';
+}
+if (!str_contains($text, 'official document-signing request')) {
+	$failures[] = 'plain-text footer missing';
+}
+if (!str_contains($html, 'debyltech.com/legal/privacy') || !str_contains($html, 'debyltech.com/legal/tos')) {
+	$failures[] = 'privacy/terms links missing from footer';
+}
+if (preg_match('/[»«]/u', $html)) {
+	$failures[] = 'German guillemets survived into the body';
+}
+if (!str_contains($html, 'Review document')) {
+	$failures[] = 'button label not normalised to "Review document"';
+}
+if (!str_contains($html, 'cid:debyltech-wordmark.png')) {
+	$failures[] = 'logo is not a cid: reference -- BeforeMessageSent listener did not fire';
+}
+if (!in_array('debyltech-wordmark.png', $inlineNames, true)) {
+	$failures[] = 'inline logo MIME part absent (found: ' . (implode(', ', $inlineNames) ?: 'none') . ')';
+}
+
+// ---------------------------------------------------------------------------
+// LibreSign signing settings. These live in oc_appconfig (the database), not on
+// disk, so they survive container recreation -- but they are re-assertable and
+// a stray click in the admin UI can change them silently. GRAPHIC in particular
+// matters: any other mode makes SignatureTextService::getSignatureWidth()
+// return $current / 2 and stamp a name/date block that duplicates -- and
+// collides with -- the one our documents already typeset.
+$appConfig = \OC::$server->get(\OCP\IAppConfig::class);
+
+// Must be exactly GRAPHIC_ONLY -- SignerElementsService::RENDER_MODE_GRAPHIC_ONLY.
+// The valid set is DESCRIPTION_ONLY / SIGNAME_AND_DESCRIPTION /
+// GRAPHIC_AND_DESCRIPTION / GRAPHIC_ONLY. Anything outside it (a bare 'GRAPHIC',
+// say) is accepted by occ but matches no radio in the admin UI and falls
+// through to default behaviour, so this asserts membership, not just non-empty.
+$renderMode = $appConfig->getValueString('libresign', 'signature_render_mode', '');
+if ($renderMode !== 'GRAPHIC_ONLY') {
+	$failures[] = 'libresign signature_render_mode is "' . $renderMode
+		. '" -- expected GRAPHIC_ONLY (signature only). Any other mode halves the '
+		. 'stamp width and overlays a duplicate name/date block.';
+}
+
+// Read with getValueBool, exactly as FooterHandler:158 does -- asserting the
+// string form would pass on a value the app itself reads as true.
+if ($appConfig->getValueBool('libresign', 'write_qrcode_on_footer', true) !== false) {
+	$failures[] = 'libresign write_qrcode_on_footer is not false -- the validation '
+		. 'QR block will be stamped on every page and overlaps the document footer. '
+		. '(Was it written without --type=boolean?)';
+}
+
+// Signer search for account-owned emails. Both keys are asserted because the
+// two failure modes are opposite and the second is the more dangerous:
+//   full_match = yes        -> account-owned emails silently unselectable
+//   full_match_email = no   -> email signer search disabled ENTIRELY
+// Defaults are 'yes' for both (MailPlugin.php:50-55), so an unset
+// full_match_email is correct and only an explicit 'no' is a problem.
+if ($appConfig->getValueString('core', 'shareapi_restrict_user_enumeration_full_match', 'yes') !== 'no') {
+	$failures[] = 'core shareapi_restrict_user_enumeration_full_match is not "no" -- '
+		. 'emails belonging to an existing Nextcloud account cannot be added as '
+		. 'LibreSign signers (MailPlugin.php:163 aborts the search).';
+}
+if ($appConfig->getValueString('core', 'shareapi_restrict_user_enumeration_full_match_email', 'yes') === 'no') {
+	$failures[] = 'core shareapi_restrict_user_enumeration_full_match_email is "no" -- '
+		. 'this disables email signer search ENTIRELY (MailPlugin.php:67). It must be '
+		. 'unset or "yes"; it is NOT the knob for the account-owned-email problem.';
+}
+
+$identDocs = $appConfig->getValueString('libresign', 'identification_documents', '');
+if ($identDocs !== '0') {
+	$failures[] = 'libresign identification_documents is "' . $identDocs
+		. '" -- expected 0. A non-zero value gates signing behind an ID upload '
+		. 'plus admin approval, and signers see no way to sign.';
+}
+
+// ---------------------------------------------------------------------------
+// Redis: distributed cache + transactional file locking.
+//
+// These come from the image's config/redis.config.php drop-in, which only
+// activates when REDIS_HOST is set on the container. If the env var is lost
+// (a container recreated from a stale spec, say), Nextcloud silently reverts
+// to DBLockingProvider and every file lock goes back to being a MariaDB write
+// -- functional, but the stalls come back with no error anywhere.
+$sysConfig = \OC::$server->get(\OCP\IConfig::class);
+
+foreach (['memcache.locking', 'memcache.distributed'] as $key) {
+	$value = $sysConfig->getSystemValueString($key, '');
+	if ($value !== '\OC\Memcache\Redis') {
+		$failures[] = $key . ' is "' . $value . '" -- expected \\OC\\Memcache\\Redis. '
+			. 'Is REDIS_HOST still set on the debyltech-cloud container?';
+	}
+}
+
+// Prove Redis is actually reachable and authenticating, not merely configured.
+// A wrong password leaves the config looking perfect while every cache and
+// lock operation fails at runtime.
+try {
+	$cacheFactory = \OC::$server->get(\OCP\ICacheFactory::class);
+	if (!$cacheFactory->isAvailable()) {
+		$failures[] = 'distributed cache reports unavailable -- redis unreachable or auth failed';
+	} else {
+		$probe = $cacheFactory->createDistributed('debyltechmail-verify');
+		$probe->set('probe', 'ok', 30);
+		if ($probe->get('probe') !== 'ok') {
+			$failures[] = 'distributed cache round-trip failed (set/get mismatch)';
+		}
+		$probe->remove('probe');
+	}
+} catch (\Throwable $e) {
+	$failures[] = 'distributed cache threw: ' . $e->getMessage();
+}
+
+if ($failures !== []) {
+	fwrite(STDERR, "debyltechmail branding verification FAILED:\n");
+	foreach ($failures as $f) {
+		fwrite(STDERR, "  - $f\n");
+	}
+	exit(1);
+}
+
+echo "debyltechmail branding OK (subject: $subject)\n";

ansible/roles/podman/templates/nextcloud/redis-debyltech.conf.j2

@@ -0,0 +1,40 @@
+# {{ ansible_managed }}
+#
+# Redis for debyltech-cloud: Nextcloud distributed cache + transactional file
+# locking. Reachable only by container name on the `shared` podman network --
+# no host port is published.
+#
+# The password lives HERE rather than on the command line as
+# `redis-server --requirepass <pass>`. That is the existing house idiom (see
+# the deleted container-nosql.yml in git history), but it leaks the secret into
+# `podman inspect`, into the generated systemd unit under
+# ~/.config/systemd/user/, and into `ps` for every user on the host. A 0640
+# config file mounted read-only keeps it out of all three.
+requirepass {{ cloud_debyltech_redis_pass }}
+
+# Bind to all interfaces WITHIN the container's network namespace. The
+# container publishes no port, so this is reachable only from the `shared`
+# podman network -- not from the host and not from the LAN.
+bind 0.0.0.0
+port 6379
+protected-mode yes
+
+# NO maxmemory / eviction policy, deliberately.
+#
+# Nextcloud puts BOTH the distributed cache and the transactional file locks in
+# this instance. Cache entries are safely evictable; LOCKS ARE NOT. An
+# `allkeys-lru` policy under memory pressure can evict a lock that a live
+# request still believes it holds, which permits concurrent writers to the same
+# file -- silent corruption rather than a visible error. With no maxmemory,
+# Redis never evicts. The host has ~14 GiB free of 31 GiB and this instance
+# holds a few hundred keys, so a cap buys nothing.
+#
+# If a cap is ever genuinely needed, use `maxmemory-policy noeviction` so Redis
+# returns an error instead of silently discarding a lock.
+
+# No persistence. Locks are ephemeral and TTL-bounded, and the cache is
+# rebuildable -- there is nothing here worth surviving a restart. Persisting
+# would be actively worse: a restored RDB could reinstate locks whose owning
+# request died, blocking files until the TTL expired.
+save ""
+appendonly no