- Add provider selection dropdown to ApiKeyHeader
- Create googleGeminiClient.js for Gemini API interactions
- Create aiProviderService.js abstraction layer for multiple AI providers
- Update windowManager to store and manage provider selection
- Update liveSummaryService and renderer to use provider abstraction
- Add @google/generative-ai package dependency
- Update sqliteClient to store provider preference in database
- Support streaming responses for both OpenAI and Gemini models
