appview: use typed request helper for RepoLogResponse

appview/state/repo.go

···
 		return
 	}
 
-	resp, err := us.Log(f.OwnerDid(), f.RepoName, ref, page)
+	repolog, err := us.Log(f.OwnerDid(), f.RepoName, ref, page)
 	if err != nil {
 		log.Println("failed to reach knotserver", err)
-		return
-	}
-
-	body, err := io.ReadAll(resp.Body)
-	if err != nil {
-		log.Printf("error reading response body: %v", err)
-		return
-	}
-
-	var repolog types.RepoLogResponse
-	err = json.Unmarshal(body, &repolog)
-	if err != nil {
-		log.Println("failed to parse json response", err)
 		return
 	}
 
···
 		LoggedInUser:       user,
 		TagMap:             tagMap,
 		RepoInfo:           f.RepoInfo(s, user),
-		RepoLogResponse:    repolog,
+		RepoLogResponse:    *repolog,
 		EmailToDidOrHandle: EmailToDidOrHandle(s, uniqueEmails(repolog.Commits)),
 	})
 	return

knotclient/unsigned.go

···
 	return do[types.RepoIndexResponse](us, req)
 }
 
-func (us *UnsignedClient) Log(ownerDid, repoName, ref string, page int) (*http.Response, error) {
+func (us *UnsignedClient) Log(ownerDid, repoName, ref string, page int) (*types.RepoLogResponse, error) {
 	const (
 		Method = "GET"
 	)
···
 		return nil, err
 	}
 
-	return us.client.Do(req)
+	return do[types.RepoLogResponse](us, req)
 }
 
 func (us *UnsignedClient) Branches(ownerDid, repoName string) (*http.Response, error) {