release: 0.5.0: Pre-1.0 security review, domain-admin role, doc consolidation

A bounce could be recorded as a successful delivery. The log-tailer's
Fixed:
  - A bounce could be recorded as a successful delivery. The log-tailer's
  - Log-tailer resumes where it stopped instead of jumping to end-of-file on
  - Level-2 rate limit no longer overshoots under concurrency: messages that
Changed:
  - The project has a single public home: `github.com/mixeme/selfpost`. Codeberg
  - Code comments no longer cite the archived specification. References like
  - `docs/code-review.md` is gone. Its plan is finished — phases 0 (bar the
  - `docs/architecture.md` gained a *Code layers* section: a diagram of
  - Phase 1 doc/code hygiene (`docs/code-review.md`): removed ~30 stale
  … (1 more in CHANGELOG)
Security:
  - Pre-release security review (plan § D, model Fable, 2026-08-06): full pass
  - `saslpasswd2` argv: the application login is now passed after a `--`
Added:
  - Optional password encryption for the two secret-bearing downloads (plan
  - Domain import accepts an encrypted export: the envelope is detected by its
  - `selfpost-backup` writes encrypted archives and reads them back:
  - `TestParseDelivery` covers the exotic mail.log shapes the review asked for
  - docs: README *Encrypting a backup or export*; `docs/security.md` §
  … (14 more in CHANGELOG)
Removed:
  - docs: `security.md` — accepted risk «restore old backup revives session rows»
Changed:
  - docs: `implementation-plan.md` trimmed to the sole open v1.x gate — pre-release
  - docs: `architecture.md` — sessions (SQLite, idle renew, password change),
  - docs: `development.md` — expanded e2e stack and `release.yml` matrix workflow.
  - docs: `security.md` — accepted risk for send-log rows stuck at `queued` after
  - docs: `roadmap.md` — optional send-log / `mail.log` follow-ups under v1.x tail.
  … (10 more in CHANGELOG)

Full detail: CHANGELOG.md (0.5.0).

internal/web/templates/backup.html

@@ -10,8 +10,11 @@
   start. TLS certificates and the mail queue are not included.</p>
   <p class="muted"><strong>The backup file is a secret</strong> (it contains
   private keys and credentials). Store and transfer it securely and delete it
-  once the restore succeeds.</p>
-  <form class="inline" method="post" action="/backup">
+  once the restore succeeds. Encrypting it below is the simplest way to do that:
+  the download is then a <code>.spbk</code> file that only the password opens.</p>
+  {{if .BackupErr}}<p class="error">{{.BackupErr}}</p>{{end}}
+  <form method="post" action="/backup">
+    {{template "encryptfields" .}}
     <button type="submit">Download full backup</button>
   </form>
 </div>
@@ -25,7 +28,17 @@
   {{if .ImportErr}}<p class="error">{{.ImportErr}}</p>{{end}}
   <form method="post" action="/domains/import" enctype="multipart/form-data">
     <label for="importfile">Domain export file</label>
-    <input id="importfile" name="file" type="file" accept=".json,application/json" required>
+    <input id="importfile" name="file" type="file" accept=".json,.spde,application/json" required>
+    <div class="encrypt">
+      <label class="check">
+        <input type="checkbox" data-encrypt-toggle>
+        <span>The file is encrypted (<code>.spde</code>)</span>
+      </label>
+      <div class="encrypt-fields" data-encrypt-fields>
+        <label for="importpw">Password</label>
+        <input id="importpw" name="import_password" type="password" autocomplete="off">
+      </div>
+    </div>
     <button type="submit">Import domain</button>
   </form>
 </div>

internal/web/templates/domain_detail.html

@@ -283,8 +283,11 @@
   import the DNS record stays the same, so no DNS change is needed.</p>
   <p class="muted"><strong>The export file is a secret</strong> — it contains the
   private DKIM key and application passwords. Transfer it securely and delete it
-  after the import.</p>
-  <form class="inline" method="post" action="/domains/{{.Domain.ID}}/export">
+  after the import, or encrypt it below and move a <code>.spde</code> file
+  instead; the import form asks for the password.</p>
+  {{if .ExportErr}}<p class="error">{{.ExportErr}}</p>{{end}}
+  <form method="post" action="/domains/{{.Domain.ID}}/export">
+    {{template "encryptfields" .}}
     <button type="submit">Export domain</button>
   </form>
 </div>

internal/web/templates/encrypt_fields.html

@@ -0,0 +1,23 @@
+{{/* Password fields shared by the full-backup and domain-export forms. The
+     checkbox is the switch: unticked, the download keeps its historic plain
+     form (.tar.gz / .json); ticked, the file is sealed in a password-encrypted
+     envelope (.spbk / .spde). The fields start hidden and are revealed by
+     panel.js — with JavaScript blocked they are simply always visible, and the
+     server still decides from the checkbox alone. */}}
+{{define "encryptfields"}}
+<div class="encrypt">
+  <label class="check">
+    <input type="checkbox" name="encrypt" value="1" data-encrypt-toggle>
+    <span>Encrypt with a password</span>
+  </label>
+  <div class="encrypt-fields" data-encrypt-fields>
+    <label for="encpw">Password</label>
+    <input id="encpw" name="password" type="password" autocomplete="new-password"
+           minlength="{{.MinPwLen}}" placeholder="at least {{.MinPwLen}} characters">
+    <label for="encpw2">Repeat password</label>
+    <input id="encpw2" name="password_confirm" type="password" autocomplete="new-password">
+    <p class="muted">Keep this password: without it the file cannot be opened,
+    and SelfPost does not store it anywhere.</p>
+  </div>
+</div>
+{{end}}

internal/web/templates/layout.html

@@ -15,7 +15,7 @@
 {{/* Unless told otherwise, htmx injects a stylesheet element of its own into
      the head for the request-indicator classes. The panel uses no
      hx-indicator, and that injected element would be the one thing the
-     Content-Security-Policy (phase 14.A) has to make an exception for, so it
+     Content-Security-Policy has to make an exception for, so it
      is switched off here. */}}
 <meta name="htmx-config" content='{"includeIndicatorStyles":false}'>
 <script src="/static/htmx.min.js" defer></script>