fix: enhance config file checks to prevent errors on missing or empty files

Add checks using `-s` flag to verify config.json existence and non-emptiness before processing passwords,
avoiding potential script failures when the file is absent or zero-length, improving robustness.

bin/create_config.sh

@@ -73,7 +73,7 @@ create_self_tls_config() {
 create_config(){
     local script_dir=$(cd "$(dirname "$0")"; pwd)
     local config_password=$(jq -r '.auth.password' "$script_dir/../config.json")
-    if [ "$config_password" != "你的密码" ]; then
+    if [ -s "$script_dir/../config.json" ] && [ "$config_password" != "你的密码" ]; then
         local regenerate
         read -p "检测到配置已存在，是否重新生成配置？(y/n): " regenerate
         if [ "$regenerate" != "y" ] && [ "$regenerate" != "Y" ]; then

bin/run.sh

@@ -15,7 +15,7 @@ run() {
     
     # 如果配置没有创建
     local password=$(jq -r '.auth.password' "$config_dir/config.json")
-    if [ "$password" = "你的密码" ]; then
+    if [ ! -s "$config_dir/config.json" ] || [ "$password" = "你的密码" ]; then
         bash "$script_dir/create_config.sh"  # 创建配置
     fi