fix: use lowercase table names for PostgreSQL compatibility

feat: mobile fixes, proxy container reorganization, and KAIAPI_ table prefix

feat: update existing files for provider toggle and proxy system

Add Microsoft Copilot provider with CAPTCHA support

Replace Copilot with HuggingChat provider

Add Microsoft Copilot provider - Browser-based provider using Playwright - Integrated into engine and config - Added test script and documentation

fix: register gemini provider in config and engine

Initial commit