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/security.go

@@ -8,7 +8,7 @@ import (
 // contentSecurityPolicy is the panel's CSP. Everything the pages load —
 // stylesheet, HTMX, the panel's own script, the favicon — is served from
 // /static by this same origin, and no template carries an inline <script>,
-// an inline event handler or a style="..." attribute (phase 14.A; the
+// an inline event handler or a style="..." attribute (the
 // template guard test enforces that), so 'self' needs no exemptions:
 //
 //   - default-src 'self' covers scripts, styles, images and the XHR that
@@ -20,7 +20,7 @@ import (
 //   - form-action 'self' keeps a form from being retargeted at another host.
 //
 // This is a second line of defence: XSS is already prevented by
-// html/template's contextual auto-escaping (spec 7.6.7).
+// html/template's contextual auto-escaping (security.md).
 const contentSecurityPolicy = "default-src 'self'; " +
 	"object-src 'none'; " +
 	"base-uri 'none'; " +
@@ -38,8 +38,8 @@ const contentSecurityPolicy = "default-src 'self'; " +
 // subdomain of that domain for a year, which is not SelfPost's call to make.
 const strictTransportSecurity = "max-age=31536000"
 
-// secure wraps the whole router with the panel's two transport-level defences
-// (phase 14.A): the security response headers, and an origin check on every
+// secure wraps the whole router with the panel's two transport-level
+// defences: the security response headers, and an origin check on every
 // state-changing request.
 //
 // It sits outside the authentication middleware on purpose, so that POST
@@ -81,7 +81,7 @@ func (s *Server) secure(next http.Handler) http.Handler {
 }
 
 // originAllowed reports whether a state-changing request came from the panel's
-// own origin (phase 14.A). This is what the session cookie's
+// own origin. This is what the session cookie's
 // SameSite=Lax attribute cannot do on its own: SameSite is judged per *site*
 // (registrable domain), so a neighbouring subdomain — a CMS on the same
 // domain, a forgotten staging host — counts as same-site and its forged POST
@@ -111,9 +111,9 @@ func originAllowed(r *http.Request) bool {
 	origin := r.Header.Get("Origin")
 	if origin == "" {
 		// Neither header. A client this old cannot be checked at all; it is
-		// let through as the risk consciously accepted for phase 14.A
-		// (single-admin panel, the administrator picks the browser). Turning
-		// this return into false is the whole of the stricter policy.
+		// let through as the risk consciously accepted (single-admin panel,
+		// the administrator picks the browser). Turning this return into
+		// false is the whole of the stricter policy.
 		return true
 	}
 	u, err := url.Parse(origin)