VPN connection log: who connected and when

WireGuard has no connect events, only the last handshake and byte counters.
awg-ctrl now checks them every 30 s and writes conn_log in users.db: connect
at the first handshake, disconnect at the last activity (the last tick the
counters moved), with the session length and traffic, plus peer_seen, the
last time each peer was online. Open sessions are restored from the database,
so a restart adds no duplicates; a down interface is not a disconnect; a peer
removed mid-session is closed. Events keep the name, owner and VPN IP as of
that moment and live 90 days. Client public IPs are not recorded.

GET /api/connlog serves the events and the per-peer last-seen list. The panel
fetches it from the selected server at /ui/connlog and fills in master key
labels and device names for sen:// peers. A new "Подключения" tab shows the
event feed with search and paging, and "who was online when", including
those who never connected.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013bNGYiDst62wH3ZGTRPFLJ

internal/ui/connlog_test.go

@@ -0,0 +1,30 @@
+package ui
+
+import "testing"
+
+// Владелец пира sen:// в журнале → название мастер-ключа и устройства этой панели.
+func TestConnLogOwnerNames(t *testing.T) {
+	a := testApp(t, t.TempDir(), "on")
+	s := &Sub{a: a}
+	if err := s.initSchema(); err != nil {
+		t.Fatal(err)
+	}
+	s.panelID = "abcd1234" // initSchema заводит свой
+
+	a.db.Exec("INSERT INTO master_keys (id, uuid, label, secret, created_at) VALUES (1, 'u1', 'Семья', x'01', 1)")
+	a.db.Exec("INSERT INTO devices (id, master_id, device_id, device_name, pub_key, auth_pub, created_at) VALUES (2, 1, 'd', 'iPhone Маши', 'W', 'A', 1)")
+	cache := map[string][3]any{}
+	for owner, want := range map[string][3]any{
+		"abcd1234/m1/d2": {"Семья", "iPhone Маши", false},
+		"m1/d2":          {"Семья", "iPhone Маши", false}, // выдан до областей панели
+		"abcd1234/m1/d9": {"Семья", nil, false},           // устройство удалено
+		"abcd1234/m7/d9": {nil, nil, false},               // и ключ удалён
+		"ffff0000/m1/d2": {nil, nil, true},                // другая панель на том же awg-ctrl
+		"что-то/другое":  {nil, nil, true},
+	} {
+		k, d, f := s.ownerNames(owner, cache)
+		if k != want[0] || d != want[1] || f != want[2] {
+			t.Errorf("%s: %v %v %v, ждали %v", owner, k, d, f, want)
+		}
+	}
+}