release: 1.2.0: Panel 1.2.0-1.2.5: layout, RBAC, tests, GUI and CI fixes

[1.2.0]
The second MINOR after 1.0.0: domain administrators with per-domain scope, a panel visual refresh on the SelfPost palette, and refinements to navigation and the send log. Upgrading runs one SQLite migration (`0005_panel_users`); the single administrator becomes a global user.
Added:
  - panel: **domain-admin role** — global administrators manage panel users and
Fixed:
  - Docker build: `LICENSE` is no longer excluded by `.dockerignore`, so the
  - panel: on signed-in pages with a narrow card (**Settings**, the user form)
Changed:
  - panel: navigation session icons are distinct — **Settings** uses a gear,
  - panel: `/` redirects domain administrators to `/domains`; global users still
  - panel: **Sign out** in the navigation column uses the same type size and
  - panel: **visual style** brought in line with the SelfPost mark — brick accent
  - panel: the send log's **status is a badge**, in the same ok/warn/error/unknown
  … (1 more in CHANGELOG)
[1.2.1]
Panel refinements after 1.2.0: navigation icons, status-badge centreing, drill-down back-link placement, and safeguards for the sole global administrator. Upgrading is a tag bump; no migration.
Fixed:
  - panel: status badge text sat low in the box (and below the heading or label
  - panel: the **Users** navigation icon was two full silhouettes with staggered
  - panel: the **Settings** navigation icon was a sun-with-rays (circle plus
  - panel: the user create/edit form placed «Back to users» at the bottom of the
Changed:
  - panel: the user edit form disables role change and delete for the only global
  - panel: the user create/edit form hides **Assigned domains** when the role is
  - panel: **Settings** shows panel credentials and DMARC aggregate reports side
[1.2.2]
Status page layout after 1.2.1: paired cards in a wide column, denser machine and check copy, and a user-form checkbox fix. Upgrading is a tag bump; no migration.
Changed:
  - panel: **Status** is wide again so paired cards fill the column. Layout:
Fixed:
  - panel: cards inside `.split` used `margin: 0 auto`, which in a CSS grid
  - panel: on the user create/edit form, **Assigned domains** checkboxes stacked
[1.2.3]
Domain detail layout and panel polish after 1.2.2. Upgrading is a tag bump; no migration.
Changed:
  - panel: the domain detail page is wide with paired cards (DKIM+SPF ‖ DMARC;
  - panel: Domains list — **Add domain** sits beside the domain field; the
  - panel: page URLs, browser titles, and headings are aligned — **Settings** is
Fixed:
  - image: `mail.log` rotation no longer silently stops when the build context
[1.2.4]
Level-2 rate-limit semantics inverted after 1.2.3, plus a small DNS field height fix. Upgrading is a tag bump; no migration.
Changed:
  - rate limiting (level 2): domain ceilings apply to every client IP (no IP
Fixed:
  - panel: on the domain DNS status grid, the Type (TXT) field height matches
[1.2.5]
Rate-limit form polish after 1.2.4. Upgrading is a tag bump; no migration.
Changed:
  - panel: rate-limit forms refined — level-1 backstop as muted copy on the

Squashed CHANGELOG sections: [1.2.0], [1.2.1], [1.2.2], [1.2.3], [1.2.4], [1.2.5].

Full detail: CHANGELOG.md (1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.2.5).

internal/store/users_test.go

@@ -0,0 +1,101 @@
+package store
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestUpdateUser(t *testing.T) {
+	st := openTestStore(t)
+
+	if err := st.CreateGlobalUser("admin", "hash-one"); err != nil {
+		t.Fatalf("CreateGlobalUser: %v", err)
+	}
+	u, err := st.GetUserByUsername("admin")
+	if err != nil {
+		t.Fatalf("GetUserByUsername: %v", err)
+	}
+	if err := st.UpdateUser(u.ID, "operator", "hash-two", "reports@hub.example"); err != nil {
+		t.Fatalf("UpdateUser: %v", err)
+	}
+
+	got, err := st.GetUser(u.ID)
+	if err != nil {
+		t.Fatalf("GetUser: %v", err)
+	}
+	if got.DMARCReportEmail != "reports@hub.example" {
+		t.Fatalf("dmarc email = %q", got.DMARCReportEmail)
+	}
+	email, err := st.GlobalDMARCReportEmail()
+	if err != nil {
+		t.Fatalf("GlobalDMARCReportEmail: %v", err)
+	}
+	if email != "reports@hub.example" {
+		t.Fatalf("settings dmarc = %q", email)
+	}
+
+	if err := st.UpdateUser(u.ID, "operator", "hash-three", ""); err != nil {
+		t.Fatalf("clear dmarc email: %v", err)
+	}
+	got, err = st.GetUser(u.ID)
+	if err != nil {
+		t.Fatalf("GetUser: %v", err)
+	}
+	if got.Username != "operator" || got.PasswordHash != "hash-three" {
+		t.Fatalf("unexpected user after update: %+v", got)
+	}
+	if got.CreatedAt.IsZero() {
+		t.Fatal("update dropped created_at")
+	}
+}
+
+func TestUpdateUserWithoutUser(t *testing.T) {
+	st := openTestStore(t)
+
+	if err := st.UpdateUser(1, "operator", "hash", ""); !errors.Is(err, ErrUserNotFound) {
+		t.Fatalf("UpdateUser without user = %v, want ErrUserNotFound", err)
+	}
+	exists, err := st.UserExists()
+	if err != nil {
+		t.Fatalf("UserExists: %v", err)
+	}
+	if exists {
+		t.Fatal("UpdateUser created a user")
+	}
+}
+
+func TestCreateDomainAdminUser(t *testing.T) {
+	st := openTestStore(t)
+	if err := st.CreateGlobalUser("admin", "hash"); err != nil {
+		t.Fatalf("CreateGlobalUser: %v", err)
+	}
+	d, err := st.AddDomain("example.com", "s1")
+	if err != nil {
+		t.Fatalf("AddDomain: %v", err)
+	}
+	id, err := st.CreateUser("domainop", "hash2", RoleDomainAdmin, []int64{d.ID})
+	if err != nil {
+		t.Fatalf("CreateUser: %v", err)
+	}
+	u, err := st.GetUser(id)
+	if err != nil {
+		t.Fatalf("GetUser: %v", err)
+	}
+	if len(u.DomainIDs) != 1 || u.DomainIDs[0] != d.ID {
+		t.Fatalf("domain ids = %v, want [%d]", u.DomainIDs, d.ID)
+	}
+}
+
+func TestDeleteLastGlobalUser(t *testing.T) {
+	st := openTestStore(t)
+	if err := st.CreateGlobalUser("admin", "hash"); err != nil {
+		t.Fatalf("CreateGlobalUser: %v", err)
+	}
+	u, err := st.GetUserByUsername("admin")
+	if err != nil {
+		t.Fatalf("GetUserByUsername: %v", err)
+	}
+	if err := st.DeleteUser(u.ID); !errors.Is(err, ErrLastGlobal) {
+		t.Fatalf("DeleteUser = %v, want ErrLastGlobal", err)
+	}
+}