panel: scope the send log to a domain admin's own domains

The Deliveries list narrowed the journal only when exactly one domain was assigned, so an administrator with none or with two or more read every domain's rows. The domain scope is now an IN constraint the store query carries, a filter that states no scope matches nothing, and the domain/app query parameters are validated against the principal before the query runs.

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

internal/store/sendlog_test.go

@@ -1,6 +1,8 @@
 package store
 
 import (
+	"sort"
+	"strings"
 	"testing"
 	"time"
 )
@@ -162,6 +164,61 @@ func TestUpdateStatusNoMatch(t *testing.T) {
 	}
 }
 
+// The journal is read by principals who are only entitled to part of it, so
+// the scope is part of the query rather than something the caller remembers to
+// apply afterwards. A filter that states no scope is a caller that has not
+// decided who is asking, and the safe answer to that is nothing.
+func TestSendLogScopeIsMandatory(t *testing.T) {
+	st := openTestStore(t)
+	for _, domain := range []string{"first.example.ru", "second.example.ru"} {
+		if err := st.InsertQueued(SendLogEntry{
+			QueueID: "Q-" + domain, Domain: domain, AppLogin: "app-" + domain,
+			From: "noreply@" + domain, To: "public@example.net", Subject: domain,
+		}); err != nil {
+			t.Fatalf("InsertQueued: %v", err)
+		}
+	}
+
+	for name, tc := range map[string]struct {
+		filter SendLogFilter
+		want   []string
+	}{
+		"no scope":           {SendLogFilter{}, nil},
+		"empty scope":        {SendLogFilter{Domains: []string{}}, nil},
+		"all domains":        {SendLogFilter{AllDomains: true}, []string{"first.example.ru", "second.example.ru"}},
+		"one domain":         {SendLogFilter{Domains: []string{"first.example.ru"}}, []string{"first.example.ru"}},
+		"two domains":        {SendLogFilter{Domains: []string{"first.example.ru", "second.example.ru"}}, []string{"first.example.ru", "second.example.ru"}},
+		"unknown domain":     {SendLogFilter{Domains: []string{"third.example.ru"}}, nil},
+		"filter within":      {SendLogFilter{Domain: "first.example.ru", Domains: []string{"first.example.ru", "second.example.ru"}}, []string{"first.example.ru"}},
+		"filter outside":     {SendLogFilter{Domain: "second.example.ru", Domains: []string{"first.example.ru"}}, nil},
+		"app filter outside": {SendLogFilter{AppLogin: "app-second.example.ru", Domains: []string{"first.example.ru"}}, nil},
+	} {
+		rows, err := st.QuerySendLog(tc.filter, 50, 0)
+		if err != nil {
+			t.Fatalf("%s: QuerySendLog: %v", name, err)
+		}
+		var got []string
+		for _, r := range rows {
+			got = append(got, r.Domain)
+		}
+		// Which rows came back is the question here; the page's own order is
+		// newest-first and is tested where it matters.
+		sort.Strings(got)
+		if strings.Join(got, ",") != strings.Join(tc.want, ",") {
+			t.Errorf("%s: rows for %v, want %v", name, got, tc.want)
+		}
+		// The count drives pagination, so it has to agree with the page or the
+		// UI advertises pages of rows the reader is not allowed to see.
+		n, err := st.CountSendLog(tc.filter)
+		if err != nil {
+			t.Fatalf("%s: CountSendLog: %v", name, err)
+		}
+		if int(n) != len(tc.want) {
+			t.Errorf("%s: count %d, want %d", name, n, len(tc.want))
+		}
+	}
+}
+
 func TestDeleteSendLogBefore(t *testing.T) {
 	st := openTestStore(t)