Bug fixes in .bas tools:
- Fix BEGIN MAIL email → BEGIN MAIL emailContato in tools 07, 09, 10
- Fix newsletter BOOLEAN → STRING in tool 10 (LLM sends 'Sim' as string)
- Add natural language descriptions to ENUM params in tools 02-10
Botserver:
- Fix duplicate chat message when tool is executed (tool_was_executed flag)
BotUI:
- Remove theme selector button from minimal chat for non-logged users
Testing: All 10 tools verified with NL ENUM mapping and DB records
