dmarc-day, health-sockets: the reporter's day said; the inbound journal dialled

The owner, 2026-10-17: "Показ времени отчёта по UTC принимаем. Это не
проблема. Пояснения добавь. Все мелочи закрой." Designs 9b33b80, 2bf9056.

DMARC: a report's day stays the reporter's, in UTC (RFC 7489 § 7.2); the
report's Window now says so under its times (windowNote), and Settings'
Time zone box and Help (#settings, #dmarc) name it as the one exception to
the panel's zone. formatDMARCWindow counts a window that ends at midnight
as ending the day before, so a daily report is one day, not "20 Sep - 21
Sep" (TestDMARCWindowIsTheReportersDay, in Moscow's zone).

Health: with the inbound relay on, the inbound journal milter's socket is
dialled (InboundJournalSocket through web and handlers Config), fail-open
as the send log's, and Overview's card counts it; the send log's socket is
named journal-milter, as the mockup names it.

The confirmation link's sign-in state is drawn (confirm-email-signin.html);
the panel already renders it.

guide: /license and /server/components, the DMARC pages' paths and day,
selfpost-backup -o / -i / -version, the Inbound log's retention field,
PANEL_COOKIE_SECURE, the inbound journal's socket, the DMARC exception to
the zone. CHANGELOG [Unreleased].

(The e2e case negative_level1_ratelimit, listed as able to pass falsely,
was fixed on 2026-10-14 - the note was stale.)

go vet + go test (26 packages) and make e2e on the test server for this
tree.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/web/handlers/handlers_dmarc_window_test.go

@@ -0,0 +1,26 @@
+package handlers
+
+import (
+	"testing"
+	"time"
+)
+
+// A report's window is its reporter's day or days, in UTC, whatever the
+// panel's zone; a window that ends at midnight ends the day before.
+func TestDMARCWindowIsTheReportersDay(t *testing.T) {
+	inZone(t, "Europe/Moscow")
+	day := func(d, h, m, s int) time.Time { return time.Date(2026, 9, d, h, m, s, 0, time.UTC) }
+	for _, c := range []struct {
+		begin, end time.Time
+		want       string
+	}{
+		{day(20, 0, 0, 0), day(21, 0, 0, 0), "20 Sep"},
+		{day(20, 0, 0, 0), day(20, 23, 59, 59), "20 Sep"},
+		{day(20, 0, 0, 0), day(22, 0, 0, 0), "20 Sep – 21 Sep"},
+		{day(20, 12, 0, 0), day(21, 12, 0, 0), "20 Sep – 21 Sep"},
+	} {
+		if got := formatDMARCWindow(c.begin, c.end); got != c.want {
+			t.Errorf("%s – %s = %q, want %q", c.begin, c.end, got, c.want)
+		}
+	}
+}