legal: close AGPL packaging gaps

Name the copyright holder, ship NOTICE with the image, serve the licence from the panel footer on every page, and record the vendored htmx licence. Co-authored-by: Cursor <cursoragent@cursor.com>
2026-08-10 21:56:51 +03:00
parent c713f51f24
commit 6c8bf0d3b3
17 changed files with 908 additions and 16 deletions
@@ -5,6 +5,16 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); version
 ## [Unreleased]
 ### Added
 - AGPL packaging hygiene: [NOTICE](NOTICE) names the copyright holder and the
  bundled third-party works (htmx 0BSD, IBM Plex OFL in outlined logos); the
  panel footer on every page — including login and setup — shows copyright, a
  link to `/license` (embedded AGPL text), a Source link to the public
  repository, and "No warranty"; the runtime image ships `LICENSE` and
  `NOTICE` under `/usr/share/doc/selfpost/`. `docs/development.md` now lists
  the vendored htmx asset beside the Go module licences.
 ## [1.0.1] - 2026-08-09
 A documentation and packaging release: no change to the mail path, the
@@ -0,0 +1,32 @@
 SelfPost
 Copyright (C) 2026 Mikhail Yenuchenko
 This product is licensed under the GNU Affero General Public License,
 version 3. The full licence text is in the LICENSE file in this
 distribution (and at /license in the control panel).
 Corresponding Source for the published releases is at:
  https://github.com/mixeme/selfpost
 If you modify SelfPost and let users interact with it over a network,
 AGPL-3.0 §13 requires you to offer them the Corresponding Source of
 your modified version. Update the Source link in the panel footer
 (internal/web/templates/layout.html) so it points at your sources.
 Third-party software included in this distribution
 ----------------------------------------------------
 htmx 2.0.4 (internal/web/static/htmx.min.js)
  Copyright (c) Big Sky Software
  Licence: Zero-Clause BSD (0BSD)
  https://github.com/bigskysoftware/htmx
 IBM Plex Sans / IBM Plex Mono (wordmarks in SVG logos only)
  Copyright © 2017 IBM Corp., with Reserved Font Name "Plex"
  Licence: SIL Open Font License 1.1
  The shipped SVGs use outlined paths derived from these fonts; the
  font files themselves are not distributed.
 Go module dependencies are listed with their licences in
 docs/development.md § External libraries. Debian packages in the
 runtime image carry their own copyright files as shipped by Debian.
@@ -262,6 +262,9 @@ Optional variables (`TRUSTED_PROXY_CIDR`, rate limits, retention): see
 ## License
 Copyright © 2026 Mikhail Yenuchenko.
 [AGPL-3.0](LICENSE). The AGPL closes the "SaaS loophole": if you run a modified
 version as a network-accessible service, you must make the modified source
 available to its users — not only when you distribute copies of the code.
 Third-party notices: [NOTICE](NOTICE).
@@ -86,6 +86,10 @@ RUN mkdir -p /run/opendkim /run/selfpost /data \
 COPY --from=build /out/panel /usr/local/bin/panel
 COPY --from=build /out/selfpost-backup /usr/local/bin/selfpost-backup
 # Licence text shipped with the image (AGPL-3.0 conveyance). The panel also
 # serves the same text at /license from an embedded copy.
 COPY LICENSE NOTICE /usr/share/doc/selfpost/
 COPY build/opendkim.conf /etc/opendkim.conf
 COPY build/logrotate-mail.conf /etc/logrotate.d/mail
 COPY build/postfix-wrapper.sh /usr/local/bin/postfix-wrapper.sh
@@ -2,6 +2,9 @@
 // several roles (architecture.md § Image and processes) as a supervised
 // process: the HTTP panel server, the journal-milter, the mail.log tailer and
 // the rate-limit checks.
 //
 // Copyright (C) 2026 Mikhail Yenuchenko
 // SPDX-License-Identifier: AGPL-3.0-only
 package main
 import (
@@ -16,6 +16,9 @@
 // the same password:
 //
 //	docker exec -i <container> selfpost-backup -decrypt < backup.spbk > backup.tar.gz
 //
 // Copyright (C) 2026 Mikhail Yenuchenko
 // SPDX-License-Identifier: AGPL-3.0-only
 package main
 import (
@@ -92,8 +92,9 @@ mechanics → Haiku. Reviewers must not be the author of the code under review.
 ## External libraries
-The project is **AGPL-3.0** ([LICENSE](../LICENSE)). New Go dependencies must
+The project is **AGPL-3.0** ([LICENSE](../LICENSE)). Copyright holder and
-be permissive or GPL-family (see
+third-party notices: [NOTICE](../NOTICE). New Go dependencies must be
 permissive or GPL-family (see
 [.cursor/rules/agent-rules.mdc](../.cursor/rules/agent-rules.mdc)).
 ### Main module (`go.mod`)
@@ -107,6 +108,12 @@ be permissive or GPL-family (see
 Transitive dependencies — `go mod graph` / `go.sum`; all indirect packages in
 the tree are AGPL-3.0-compatible.
 ### Vendored front-end
 | Asset | Version | Repository | License |
 |---|---|---|---|
 | `internal/web/static/htmx.min.js` | 2.0.4 | <https://github.com/bigskysoftware/htmx> | 0BSD |
 ### E2e module (`test/e2e/go.mod`)
 | Package | Version | Repository | License |
@@ -121,6 +128,8 @@ the image.
 Postfix, OpenDKIM, `supervisord`, `sasl2-bin`, `logrotate`, and others come
 from Debian bookworm repositories; licenses are in each package's `copyright`
 file on <https://packages.debian.org/bookworm/>.
 The image also ships [LICENSE](../LICENSE) and [NOTICE](../NOTICE) under
 `/usr/share/doc/selfpost/`. The panel serves the AGPL text at `/license`.
 ---
@@ -316,6 +325,7 @@ There is no `docs/archive/` directory.
 | [guide.md](guide.md) | Proxy, env, DNS, IP warmup, operations, rate limiting, backup, ports, image tag |
 | [SECURITY.md](../SECURITY.md) | Private reporting channel, supported versions, scope |
 | [LICENSE](../LICENSE) | AGPL-3.0 full text |
 | [NOTICE](../NOTICE) | Copyright holder and third-party attributions |
 | [deploy/docker-compose.yml](../deploy/docker-compose.yml) + proxies | Apache + nginx/Caddy/Traefik under [deploy/](../deploy/) |
 | [deploy/.env.example](../deploy/.env.example) | Public env template; full reference in [guide.md](guide.md) |
 | [CHANGELOG.md](../CHANGELOG.md) | Keep a Changelog |
@@ -0,0 +1,661 @@
                    GNU AFFERO GENERAL PUBLIC LICENSE
                       Version 3, 19 November 2007
 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
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 or that patent license was granted, prior to 28 March 2007.
  Nothing in this License shall be construed as excluding or limiting
 any implied license or other defenses to infringement that may
 otherwise be available to you under applicable patent law.
  12. No Surrender of Others' Freedom.
  If conditions are imposed on you (whether by court order, agreement or
 otherwise) that contradict the conditions of this License, they do not
 excuse you from the conditions of this License.  If you cannot convey a
 covered work so as to satisfy simultaneously your obligations under this
 License and any other pertinent obligations, then as a consequence you may
 not convey it at all.  For example, if you agree to terms that obligate you
 to collect a royalty for further conveying from those to whom you convey
 the Program, the only way you could satisfy both those terms and this
 License would be to refrain entirely from conveying the Program.
  13. Remote Network Interaction; Use with the GNU General Public License.
  Notwithstanding any other provision of this License, if you modify the
 Program, your modified version must prominently offer all users
 interacting with it remotely through a computer network (if your version
 supports such interaction) an opportunity to receive the Corresponding
 Source of your version by providing access to the Corresponding Source
 from a network server at no charge, through some standard or customary
 means of facilitating copying of software.  This Corresponding Source
 shall include the Corresponding Source for any work covered by version 3
 of the GNU General Public License that is incorporated pursuant to the
 following paragraph.
  Notwithstanding any other provision of this License, you have
 permission to link or combine any covered work with a work licensed
 under version 3 of the GNU General Public License into a single
 combined work, and to convey the resulting work.  The terms of this
 License will continue to apply to the part which is the covered work,
 but the work with which it is combined will remain governed by version
 3 of the GNU General Public License.
  14. Revised Versions of this License.
  The Free Software Foundation may publish revised and/or new versions of
 the GNU Affero General Public License from time to time.  Such new versions
 will be similar in spirit to the present version, but may differ in detail to
 address new problems or concerns.
  Each version is given a distinguishing version number.  If the
 Program specifies that a certain numbered version of the GNU Affero General
 Public License "or any later version" applies to it, you have the
 option of following the terms and conditions either of that numbered
 version or of any later version published by the Free Software
 Foundation.  If the Program does not specify a version number of the
 GNU Affero General Public License, you may choose any version ever published
 by the Free Software Foundation.
  If the Program specifies that a proxy can decide which future
 versions of the GNU Affero General Public License can be used, that proxy's
 public statement of acceptance of a version permanently authorizes you
 to choose that version for the Program.
  Later license versions may give you additional or different
 permissions.  However, no additional obligations are imposed on any
 author or copyright holder as a result of your choosing to follow a
 later version.
  15. Disclaimer of Warranty.
  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
 APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
 OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
 IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
 ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
  16. Limitation of Liability.
  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGES.
  17. Interpretation of Sections 15 and 16.
  If the disclaimer of warranty and limitation of liability provided
 above cannot be given local legal effect according to their terms,
 reviewing courts shall apply local law that most closely approximates
 an absolute waiver of all civil liability in connection with the
 Program, unless a warranty or assumption of liability accompanies a
 copy of the Program in return for a fee.
                     END OF TERMS AND CONDITIONS
            How to Apply These Terms to Your New Programs
  If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
 free software which everyone can redistribute and change under these terms.
  To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively
 state the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.
    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 Also add information on how to contact you by electronic and paper mail.
  If your software can interact with users remotely through a computer
 network, you should also make sure that it provides a way for users to
 get its source.  For example, if your program is a web application, its
 interface could display a "Source" link that leads users to an archive
 of the code.  There are many ways you could offer source, and different
 solutions will be better for different programs; see section 13 for the
 specific requirements.
  You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU AGPL, see
 <https://www.gnu.org/licenses/>.
@@ -0,0 +1,22 @@
 // Package legal embeds SelfPost's AGPL-3.0 licence text so the panel can
 // serve it at /license (Appropriate Legal Notices) without depending on
 // GitHub or a file on disk at runtime.
 //
 // The copy in this directory must stay identical to the repository-root
 // LICENSE; license_test.go enforces that.
 package legal
 import (
 	_ "embed"
 )
 //go:embed LICENSE
 var License []byte
 // SourceURL is where Corresponding Source for the published upstream
 // releases lives. Operators who ship a modified version must point their
 // users at their own sources instead (NOTICE; AGPL-3.0 §13).
 const SourceURL = "https://github.com/mixeme/selfpost"
 // CopyrightLine is the short copyright notice shown in the panel footer.
 const CopyrightLine = "Copyright © 2026 Mikhail Yenuchenko"
@@ -0,0 +1,21 @@
 package legal
 import (
 	"bytes"
 	"os"
 	"path/filepath"
 	"testing"
 )
 func TestEmbeddedLicenseMatchesRoot(t *testing.T) {
 	root, err := os.ReadFile(filepath.Join("..", "..", "LICENSE"))
 	if err != nil {
 		t.Fatalf("read root LICENSE: %v", err)
 	}
 	if !bytes.Equal(root, License) {
 		t.Fatal("internal/legal/LICENSE differs from the repository-root LICENSE; copy the root file over")
 	}
 	if len(License) == 0 {
 		t.Fatal("embedded LICENSE is empty")
 	}
 }
@@ -0,0 +1,25 @@
 package web
 import (
 	"net/http"
 	"github.com/mixeme/selfpost/internal/legal"
 )
 // handleLicense serves the AGPL-3.0 text so every interactive page's
 // "License" footer link works without leaving the panel (AGPL Appropriate
 // Legal Notices). Unauthenticated on purpose: the notice must be reachable
 // from the login and setup screens too.
 func (s *Server) handleLicense(w http.ResponseWriter, r *http.Request) {
 	if r.Method != http.MethodGet && r.Method != http.MethodHead {
 		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
 		return
 	}
 	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
 	w.Header().Set("X-Content-Type-Options", "nosniff")
 	w.WriteHeader(http.StatusOK)
 	if r.Method == http.MethodHead {
 		return
 	}
 	_, _ = w.Write(legal.License)
 }
@@ -0,0 +1,42 @@
 package web
 import (
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 	"github.com/mixeme/selfpost/internal/legal"
 )
 func TestLicenseHandlerServesAGPL(t *testing.T) {
 	s := &Server{}
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodGet, "/license", nil)
 	s.handleLicense(rec, req)
 	if rec.Code != http.StatusOK {
 		t.Fatalf("status = %d, want 200", rec.Code)
 	}
 	ct := rec.Header().Get("Content-Type")
 	if !strings.HasPrefix(ct, "text/plain") {
 		t.Errorf("Content-Type = %q, want text/plain", ct)
 	}
 	body := rec.Body.String()
 	if !strings.Contains(body, "GNU AFFERO GENERAL PUBLIC LICENSE") {
 		t.Error("response is missing the AGPL title")
 	}
 	if body != string(legal.License) {
 		t.Error("response body does not match legal.License")
 	}
 }
 func TestLicenseHandlerRejectsNonGET(t *testing.T) {
 	s := &Server{}
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/license", nil)
 	s.handleLicense(rec, req)
 	if rec.Code != http.StatusMethodNotAllowed {
 		t.Fatalf("status = %d, want 405", rec.Code)
 	}
 }
@@ -176,7 +176,12 @@ h2 { font-size: 1.05rem; margin: 0 0 0.4rem; }
 .back { display: block; margin-bottom: 1rem; }
 /* Build version, closing every authenticated page. Quiet on purpose: it is
   reference material, not something to read on the way past. */
-.version { margin-top: 1.6rem; text-align: right; font-size: 0.8rem; color: #6b7280; }
+.version { margin-top: 1.6rem; text-align: right; font-size: 0.8rem; color: #6b7280; line-height: 1.45; }
 .version a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
 .version a:hover { color: var(--fg); }
 /* The signed-out column is 24rem; a right-aligned multi-link notice wraps
   into a ragged edge, so centre it there. */
 main.page-login .version, main.page-setup .version { text-align: center; }
 select, textarea {
  width: 100%; padding: 0.55rem 0.7rem; font-size: 1rem;
  border: 1px solid var(--control-border); border-radius: 6px; background: var(--input-bg); color: inherit;
@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"html/template"
 	"net/http"
 	"github.com/mixeme/selfpost/internal/legal"
 )
 // templates holds the parsed page and fragment templates. Each page is parsed
@@ -84,13 +86,15 @@ func (s *Server) render(w http.ResponseWriter, status int, page string, data any
 	// The layout's navigation compares .Active against each item, so the key
 	// must exist on every authenticated page. Defaulting it here keeps a page
 	// that forgets it from failing to render — it simply highlights nothing.
-	// .Version, shown in the layout's footer, is supplied the same way: it is
+	// Footer fields (.Version, .Copyright, .SourceURL) are the same on every
-	// the same value on every page, so no handler should have to pass it.
+	// page, so no handler should have to pass them.
 	if m, ok := data.(map[string]any); ok {
 		if _, has := m["Active"]; !has {
 			m["Active"] = ""
 		}
 		m["Version"] = s.cfg.Version
 		m["Copyright"] = legal.CopyrightLine
 		m["SourceURL"] = legal.SourceURL
 	}
 	var buf bytes.Buffer
 	if err := tmpl.ExecuteTemplate(&buf, "layout.html", data); err != nil {
@@ -37,11 +37,17 @@
     tell the send log from a single delivery's page. */}}
 <main class="page-{{.Active}} {{template "wide" .}}">
 {{template "content" .}}
-{{/* The running version, on every authenticated page: it is what a backup
+{{/* Appropriate Legal Notices (AGPL-3.0): copyright, how to read the licence,
-     manifest is checked against on restore and the first thing to establish
+     where the Corresponding Source is, and that there is no warranty. Shown
-     when something behaves unexpectedly. Only for signed-in administrators —
+     on every page, including login/setup — those are interactive UIs too.
-     the login and setup pages must not advertise it to the internet. */}}
+     The running version stays signed-in only: it is what a backup manifest is
-{{if .User}}<footer class="version">SelfPost {{.Version}}</footer>{{end}}
+     checked against on restore, and must not be advertised to the internet. */}}
 <footer class="version">
  {{if .User}}SelfPost {{.Version}} · {{end}}{{.Copyright}} ·
  <a href="/license">License (AGPL-3.0)</a> ·
  <a href="{{.SourceURL}}">Source</a> ·
  No warranty
 </footer>
 </main>
 </div>
 </body>
@@ -105,16 +105,28 @@ func TestSectionLinksPointAtCardsThatExist(t *testing.T) {
 // The version comes from render(), not from each handler's data map, so the
 // footer is only correct as long as every page composes with the layout and
 // render keeps supplying the key. Both are asserted here rather than trusted.
 // Appropriate Legal Notices (copyright, licence, source, no warranty) must
 // appear on every page, including the signed-out ones.
 func TestLayoutShowsTheVersionOnlyWhenSignedIn(t *testing.T) {
 	tmpl, err := loadTemplates()
 	if err != nil {
 		t.Fatalf("loadTemplates: %v", err)
 	}
 	legalBits := []string{
 		"Copyright © 2026 Mikhail Yenuchenko",
 		`href="/license"`,
 		"License (AGPL-3.0)",
 		`href="https://github.com/mixeme/selfpost"`,
 		"Source",
 		"No warranty",
 	}
 	rendered := 0
 	for name := range tmpl.pages {
 		var buf bytes.Buffer
 		err := tmpl.pages[name].ExecuteTemplate(&buf, "layout.html", map[string]any{
 			"Title": "t", "User": "admin", "Active": "", "Version": "9.9.9-test",
 			"Copyright": "Copyright © 2026 Mikhail Yenuchenko",
 			"SourceURL": "https://github.com/mixeme/selfpost",
 		})
 		if err != nil {
 			// Pages whose content block needs more data than this cannot be
@@ -123,23 +135,38 @@ func TestLayoutShowsTheVersionOnlyWhenSignedIn(t *testing.T) {
 			continue
 		}
 		rendered++
-		if !strings.Contains(buf.String(), "SelfPost 9.9.9-test") {
+		out := buf.String()
 		if !strings.Contains(out, "SelfPost 9.9.9-test") {
 			t.Errorf("page %q does not show the version in the layout footer", name)
 		}
 		for _, want := range legalBits {
 			if !strings.Contains(out, want) {
 				t.Errorf("page %q is missing legal notice %q", name, want)
 			}
 		}
 	}
 	if rendered == 0 {
 		t.Fatal("no page rendered, so the footer was never actually checked")
 	}
-	// Signed out (login, setup) the version must not be advertised.
+	// Signed out (login, setup) the version must not be advertised, but the
 	// Appropriate Legal Notices must still be present.
 	var buf bytes.Buffer
 	if err := tmpl.pages["login"].ExecuteTemplate(&buf, "layout.html", map[string]any{
 		"Title": "t", "Active": "", "Version": "9.9.9-test",
 		"Copyright": "Copyright © 2026 Mikhail Yenuchenko",
 		"SourceURL": "https://github.com/mixeme/selfpost",
 	}); err != nil {
 		t.Fatalf("execute login: %v", err)
 	}
-	if strings.Contains(buf.String(), "9.9.9-test") {
+	out := buf.String()
-		t.Errorf("the login page shows the version to unauthenticated visitors:\n%s", buf.String())
+	if strings.Contains(out, "9.9.9-test") {
 		t.Errorf("the login page shows the version to unauthenticated visitors:\n%s", out)
 	}
 	for _, want := range legalBits {
 		if !strings.Contains(out, want) {
 			t.Errorf("login page is missing legal notice %q", want)
 		}
 	}
 }
@@ -159,8 +186,18 @@ func TestRenderSuppliesTheVersion(t *testing.T) {
 	if got := data["Version"]; got != "9.9.9-test" {
 		t.Errorf("render did not supply Version (got %v)", got)
 	}
-	if !strings.Contains(rec.Body.String(), "SelfPost 9.9.9-test") {
+	if got := data["Copyright"]; got != "Copyright © 2026 Mikhail Yenuchenko" {
-		t.Errorf("rendered page does not show the version:\n%s", rec.Body.String())
+		t.Errorf("render did not supply Copyright (got %v)", got)
 	}
 	if got := data["SourceURL"]; got != "https://github.com/mixeme/selfpost" {
 		t.Errorf("render did not supply SourceURL (got %v)", got)
 	}
 	body := rec.Body.String()
 	if !strings.Contains(body, "SelfPost 9.9.9-test") {
 		t.Errorf("rendered page does not show the version:\n%s", body)
 	}
 	if !strings.Contains(body, `href="/license"`) || !strings.Contains(body, "No warranty") {
 		t.Errorf("rendered page is missing Appropriate Legal Notices:\n%s", body)
 	}
 }
@@ -147,6 +147,10 @@ func (s *Server) Handler() http.Handler {
 	// Health check stays unauthenticated for the container/orchestrator.
 	mux.HandleFunc("/healthz", handleHealth)
 	// AGPL Appropriate Legal Notices: the licence text itself, reachable
 	// without a session so the login and setup footers can link to it.
 	mux.HandleFunc("/license", s.handleLicense)
 	// Vendored static assets (HTMX). Served from the embedded FS, with a
 	// content ETag so a replaced asset survives the browser cache (static.go).
 	mux.Handle("/static/", staticHandler())