fix(installer): use correct NSIS MessageBox constant

- Change MB_ICONWARNING to MB_ICONEXCLAMATION (NSIS uses Win32 naming)
- Fixes NSIS compilation error on line 740

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Test

scripts/installer/mcpb-installer.nsi

@@ -737,7 +737,7 @@ Function VerifyInstallation
             StrCpy $0 "$0Installation completed with warnings.$\r$\n"
             StrCpy $0 "$0MCPB installed successfully, but Claude Desktop$\r$\n"
             StrCpy $0 "$0integration was not configured."
-            MessageBox MB_OK|MB_ICONWARNING "$0"
+            MessageBox MB_OK|MB_ICONEXCLAMATION "$0"
         ${EndIf}
     ${EndIf}
 FunctionEnd

src/code_indexer/__init__.py

@@ -6,5 +6,5 @@
 HNSW graph indexing (O(log N) complexity).
 """
 
-__version__ = "8.4.40"
+__version__ = "8.4.41"
 __author__ = "Seba Battig"