chore: remove Chinese mirror repositories, restore JetBrains defaults

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: Q-Peppa

build.gradle.kts

@@ -18,19 +18,6 @@ kotlin {
 
 
 repositories {
-    // 本地 WebStorm 离线仓库（跳过 933MB 下载）
-    maven { url = uri("file:///home/demo/jetbrains-mirror/local-maven") }
-    // 阿里云
-    maven { url = uri("https://maven.aliyun.com/repository/public") }
-    maven { url = uri("https://maven.aliyun.com/repository/central") }
-    // 腾讯云
-    maven { url = uri("https://mirrors.cloud.tencent.com/nexus/repository/maven-public/") }
-    // 华为云
-    maven { url = uri("https://repo.huaweicloud.com/repository/maven/") }
-    // 清华 TUNA
-    maven { url = uri("https://mirrors.tuna.tsinghua.edu.cn/maven/") }
-    // 中科大
-    maven { url = uri("https://mirrors.ustc.edu.cn/maven/") }
     mavenCentral()
     intellijPlatform {
         defaultRepositories()