fix: technical debts left by the Sites, Authors and SEO slices, plus backend support for the new Sites and Authors pagination

api/handlers/author/authorHandler.go

@@ -121,7 +121,7 @@ func readPatchAuthor(r *http.Request) (PatchAuthor, bool) {
 	if err := json.Unmarshal(raw, &fields); err != nil {
 		return PatchAuthor{}, false
 	}
-	known := 0
+	known := false
 	for _, name := range requiredNonNullFields {
 		value, present := fields[name]
 		if !present {
@@ -130,14 +130,14 @@ func readPatchAuthor(r *http.Request) (PatchAuthor, bool) {
 		if string(value) == "null" {
 			return PatchAuthor{}, false
 		}
-		known++
+		known = true
 	}
 	for _, name := range nullableFields {
 		if _, present := fields[name]; present {
-			known++
+			known = true
 		}
 	}
-	if known == 0 {
+	if !known {
 		return PatchAuthor{}, false
 	}
 	var request PatchAuthor
@@ -288,6 +288,7 @@ func (h *Handler) List(w http.ResponseWriter, r *http.Request) {
 	for _, item := range page.Items {
 		items = append(items, presentAuthor(item))
 	}
+	w.Header().Set("X-Total-Count", strconv.Itoa(page.Total))
 	writeJSON(w, http.StatusOK, listResponse{Items: items, Total: page.Total, Page: page.Page, Size: page.Size})
 }