Fix the Windows release binary failing to start due to missing
libiconv-2.dll. The root cause was the sed workaround using .dll.a
files (import libraries for dynamic linking) instead of .a files
(static libraries).
Changes:
- Fix sed command in configure-win.sh to use static libraries (.a)
instead of dynamic import libraries (.dll.a) for libiconv/libintl
- Add bundle-win-dlls.sh script that detects and copies any missing
DLLs as a safety net (reports none needed with proper static linking)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>