release: 1.3.0: 1.3.0-1.3.1: security pass, queue persist, full backup layout

[1.3.0]
Security and quality after 1.2.5: domain-admin send-log authorization, fail-closed sign-in and application delete, level-2 rate-limit race fix, restore Resync, expanded tests, operator docs, release CI, and OFL for IBM Plex. Upgrading from 1.2.x is a tag bump; no migration.
Added:
  - licence: the SIL Open Font License 1.1 text now travels with the IBM Plex
  - docs: agreed roadmap item **queue-retries** — show this Postfix's retry
Security:
  - The independent security review of the send-log authorization and
Fixed:
  - test (e2e): send-log status scrapers follow the badge markup in
  - security (panel): the Deliveries list is scoped to a domain administrator's
  - mail (level-2 rate limit): the ceiling is no longer overshot by messages that
  - panel (sign-in): a session that cannot be written to the database no longer
  - panel (applications): deleting an application removes its SASL credentials
  … (2 more in CHANGELOG)
Changed:
  - docs: operator and as-built docs aligned with the code after a full
  - docs: [guide.md](docs/guide.md) reorganised into **Installation**, **Instance
  - docs: the 2026-08-13 full-tree review plan is complete — every phase (P0–P7)
  - licence: [NOTICE](NOTICE) tells modifiers to update `SourceURL` in
  - ci: the release image is published only for a **published** GitHub Release
  … (9 more in CHANGELOG)
[1.3.1]
Retry policy in the panel, persistent Postfix queue, and self-contained full backups. Mail queue and delivery history show this Postfix's first retry, backoff cap, and queue lifetime. Deferred mail survives container recreate. Full backups now archive `data/`, compose, `.env`, and `certs/`; the archive layout breaks 1.3.0 flat backups (unpack those with `tar xzf backup.tar.gz -C ./data` as before). Upgrading from 1.3.0 is a tag bump; no schema migration.
Added:
  - Mail queue and a delivery's history show this Postfix's retry policy
  - docs: **Plan checklists** in [development.md](docs/development.md) — format,
  - docs: **Implementation checklists** with model routing in
  - docs: roadmap candidates **send-log-retention** (panel Settings for delivery
  - Postfix queue under `/data/postfix/queue` — deferred and active mail survive
  … (1 more in CHANGELOG)
Changed:
  - **Breaking:** full-backup archive layout — paths are prefixed with `data/`;
  - docs: operator guide, architecture, security, and backup UI updated for
  - docs: HTML mockups for a full panel UI refresh
Changed:
  - docs: panel UI mockups after review — Status restored to live readings
  - docs: panel UI design system and mockups rebuilt as separate pages
  - docs: panel UI mockups — add-domain sits in the list card (Domains and
Fixed:
  - ci (GHCR): per-arch package tags (`X.Y.Z-amd64`, `X.Y.Z-arm64`) are dropped

Squashed CHANGELOG sections: [1.3.0], [1.3.1].

Full detail: CHANGELOG.md (1.3.0, 1.3.1).

internal/web/view/templates/mail_queue.html

@@ -1,10 +1,40 @@
-{{/* A table of queue ids, sizes, senders and recipients: the whole column
-     rather than the reading measure (see the "wide" block in layout.html). */}}
+{{/* Mail queue is two cards in the whole column: the retry-policy snapshot
+     (static, outside the HTMX poll) and the live postqueue listing. */}}
 {{define "wide"}}wide{{end}}
 
 {{define "content"}}
 <h1>Mail queue</h1>
 
+<div class="card" id="retry-policy">
+  <h2>How delivery retries work</h2>
+  <p class="muted">This Postfix's policy, read once at panel start. There is
+  no maximum attempt count — only time. A deferred message stays in this
+  listing until it is delivered or the queue lifetime runs out.</p>
+  {{if .RetryFromDefaults}}
+  <p class="muted">Could not read the effective Postfix configuration;
+  showing compiled-in defaults. A live change is visible after the next
+  panel restart.</p>
+  {{end}}
+  <div class="facts retry-facts">
+    <div class="fact">
+      <span class="fact-label">First retry</span>
+      <span class="fact-value">{{.FirstRetry}}</span>
+    </div>
+    <div class="fact">
+      <span class="fact-label">Later retries</span>
+      <span class="fact-value">doubling, cap {{.BackoffCap}}</span>
+    </div>
+    <div class="fact">
+      <span class="fact-label">Kept in queue</span>
+      <span class="fact-value">{{.QueueLifetime}}</span>
+    </div>
+    <div class="fact">
+      <span class="fact-label">Then</span>
+      <span class="fact-value">bounced</span>
+    </div>
+  </div>
+</div>
+
 <div class="card">
   <h2>Pending messages</h2>
   {{template "mail_queue_body" .}}