[Blocker] fix: improve CSV export format with proper escaping and UTF-8 BOM for Excel

## GitHub Update **Repository:** [MKWcorp/drwprime](https://github.com/MKWcorp/drwprime) **Author:** MKWcorp **Date:** 2/7/2026, 12:11:02 PM **Commit:** [`c48fa61`](https://github.com/MKWcorp/drwprime/commit/c48fa614efbda961e8a81e8200f2b4d7fcfd2fee) ### Commit Message fix: improve CSV export format with proper escaping and UTF-8 BOM for Excel --- _This story was imported from historical commits._