refactor(config): use download_file for HTTP(S) subscription downloads

install.sh

@@ -41,7 +41,7 @@ prompt_subscription_if_needed
 
 if [ -n "$(subscription_url 2>/dev/null || true)" ]; then
   if generate_config; then
-    echo "📡 订阅已生效"
+    echo "✨ 订阅已生效"
     post_install_verify
   else
     write_runtime_value "INSTALL_VERIFY_CONFIG_READY" "false"

scripts/core/config.sh

@@ -2624,9 +2624,9 @@ prompt_subscription_if_needed() {
   fi
 
   echo
-  echo "📡 订阅"
+  echo "📦 订阅"
   echo "请输入订阅链接"
-  echo "直接回车可跳过，稍后执行：clashctl add <订阅链接>"
+  # echo "直接回车可跳过，稍后执行：clashctl add <订阅链接>"
   printf "> "
   IFS= read -r input_url || true