refactor: refactor HTTP client setup to enhance configuration flexibility (#47)

- Refactor HTTP client initialization to always create a custom http.Client
- Move TLS config modification into the default HTTP client when insecure flag is set
- Ensure the HTTP client is always included in client options

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Reviewed-on: https://gitea.com/gitea/gitea-mcp/pulls/47
Co-authored-by: appleboy <appleboy.tw@gmail.com>
Co-committed-by: appleboy <appleboy.tw@gmail.com>

pkg/gitea/gitea.go

@@ -22,19 +22,20 @@ func Client() *gitea.Client {
 		if client != nil {
 			return
 		}
+
+		httpClient := &http.Client{
+			Transport: http.DefaultTransport,
+		}
+
 		opts := []gitea.ClientOption{
 			gitea.SetToken(flag.Token),
 		}
 		if flag.Insecure {
-			httpClient := &http.Client{
-				Transport: &http.Transport{
-					TLSClientConfig: &tls.Config{
-						InsecureSkipVerify: true,
-					},
-				},
+			httpClient.Transport.(*http.Transport).TLSClientConfig = &tls.Config{
+				InsecureSkipVerify: true,
 			}
-			opts = append(opts, gitea.SetHTTPClient(httpClient))
 		}
+		opts = append(opts, gitea.SetHTTPClient(httpClient))
 		if flag.Debug {
 			opts = append(opts, gitea.SetDebugMode())
 		}