fix: ollama connection permissions and add AI language setting

[M4lmostoso]

Summary

Changes

Type of Change

• Bug fix
• New feature
• Enhancement (improving existing feature)
• Refactor (no behavior change)
• Documentation
• CI/Build

Testing

• Existing tests pass (npm run test)
• New tests added (if applicable)
• Manually tested

Screenshots

[M4lmostoso]

Description

This PR fixes connection issues with Ollama on Tauri v2 and introduces a new setting to choose the preferred AI response language.

Key Changes:

1. HTTP Permissions Fix (Tauri v2): Added explicit scope for http://localhost:11434/* and http://127.0.0.1:11434/* in capabilities/default.json. This resolves the "url not allowed on the configured scope" error when connecting to a local Ollama instance.
2. AI Language Setting: Added a new dropdown in the AI Settings tab to allow users to select their preferred language (Italian, French, German, etc.).
3. Multilingual Prompts: Updated aiService.ts to automatically inject language instructions into key AI features such as summaries, replies, and task extraction.
4. Ollama Provider Improvement: Enhanced the connection test logic in ollamaProvider.ts to be more flexible with different Ollama API response formats.

Testing

• Verified that "Test Connection" with Ollama now passes correctly.
• Confirmed that thread summaries are generated in the selected language (e.g., Italian).
• Verified successful application build on macOS.