refactor: 从用户配置中读取域名由getDevstarDomain函数负责

src/home.ts

@@ -16,7 +16,7 @@ export default class DSHome {
     this.user = new User(context);
     this.remoteContainer = new RemoteContainer(this.user);
 
-    this.devstarDomain = vscode.workspace.getConfiguration('devstar').get('devstarDomain')
+    this.devstarDomain = utils.getDevstarDomain()
     if (undefined == this.devstarDomain || "" == this.devstarDomain) {
       this.devstarHomePageUrl = "https://devstar.cn/devstar-home"
     } else {

src/utils.ts

@@ -102,3 +102,8 @@ export async function getVsCodeCommitId(): Promise<string> {
 
   }
 }
+
+export function getDevstarDomain(): string | undefined {
+  // 从用户配置中读取
+  return vscode.workspace.getConfiguration('devstar').get('devstarDomain')
+}