fix: align meeting note payloads

internal/httpapi/payload_userid_test.go

@@ -47,6 +47,50 @@ func TestPayloadUserIDsAreStrings(t *testing.T) {
 	}
 }
 
+func TestMeetingPayloadIncludesNamesAndDerivedEndedState(t *testing.T) {
+	now := time.Now().UTC()
+	userA, err := parseUserID("usrag7w9xJ6hto")
+	if err != nil {
+		t.Fatal(err)
+	}
+	userB, err := parseUserID("usr1RqTFgHSenM")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	payload := meetingPayload(store.Meeting{
+		MeetingID:   "mtg_1",
+		Title:       "周会",
+		OrganizerID: userA,
+		RecorderID:  userA,
+		Organizer:   store.UserSummary{UserID: userA, DisplayName: "张三"},
+		Recorder:    store.UserSummary{UserID: userA, DisplayName: "张三"},
+		StartAt:     now.Add(-2 * time.Hour),
+		EndAt:       now.Add(-time.Hour),
+		State:       "scheduled",
+		CreatedAt:   now,
+		UpdatedAt:   now,
+		Participants: []store.MeetingParticipant{
+			{UserID: userB, Response: "pending", User: store.UserSummary{UserID: userB, DisplayName: "李四"}},
+		},
+	}, userA)
+
+	if payload["state"] != "ended" {
+		t.Fatalf("state=%v, want ended", payload["state"])
+	}
+	if payload["organizer_display_name"] != "张三" {
+		t.Fatalf("organizer_display_name=%v", payload["organizer_display_name"])
+	}
+	names, ok := payload["participant_names"].([]string)
+	if !ok || len(names) != 1 || names[0] != "李四" {
+		t.Fatalf("participant_names=%#v", payload["participant_names"])
+	}
+	participants, ok := payload["participants"].([]map[string]any)
+	if !ok || len(participants) != 1 || participants[0]["display_name"] != "李四" {
+		t.Fatalf("participants=%#v", payload["participants"])
+	}
+}
+
 func assertNoNumericUserIDs(t *testing.T, value any) {
 	t.Helper()
 	switch typed := value.(type) {