fix: update sed escape pattern to handle pipe delimiter in save_env_var function

lib/common.sh

@@ -96,9 +96,9 @@ save_env_var() {
     return 1
   fi
 
-  # Escape special characters in value for sed
+  # Escape special characters in value for sed (delimiter is |)
   local escaped_value
-  escaped_value=$(printf '%s' "$value" | sed 's/[&/\]/\\&/g')
+  escaped_value=$(printf '%s' "$value" | sed 's/[&/\|]/\\&/g')
 
   if grep -q "^${key}=" "$env_file"; then
     # Replace existing line — match KEY= followed by anything (value + optional comment)