Feat/universal ai handler and ollama

[justserdar]

Replaces #837 Reason of redoing: Proper branch

Description

Created a func that returns providers and gives the option to change the default model.

1. Installed ollama-ai-provider.
2. Updated libs/ai-providers.
3. Replaced existing AI composition functions.
4. Added env's and default example api url of ollama (never forget /api behind the port).

Improvements:

• Pull available models from ollama model list endpoint (using tags) and only allow those.

Type of Change

• [X] ✨ New feature (non-breaking change which adds functionality)

Areas Affected

Please check all that apply:

• [X] API Endpoints

Testing Done

Describe the tests you've done:

• [ ] Unit tests added/updated
• [ ] Integration tests added/updated
• [X] Manual testing performed

Security Considerations

For changes involving data or authentication:

• [X] No sensitive data is exposed
• [ ] Authentication checks are in place
• [ ] Input validation is implemented
• [ ] Rate limiting is considered (if applicable)

Screenshots

Let me know what you think, this needs further UI tooling so we can actively change it. It's best we add that pull model list from ollama instance before and show it in a dropdown:

• Dropdown for provider selection
• Dropdown for the models

UI idea

Example

Summary by CodeRabbit

• New Features
  • Added support for the Ollama AI provider, enabling selection of different AI models including "llava:7b".
• Chores
  • Updated environment variable examples to include configuration for Ollama integration.
  • Added a new dependency for Ollama AI provider in the package configuration.

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Walkthrough

The changes introduce Ollama as a new, configurable AI provider alongside existing providers. A new utility module centralizes AI model instantiation, allowing dynamic selection between OpenAI, Google, and Ollama models. Environment variables for Ollama configuration are added, and all relevant code paths are updated to use the new provider-agnostic interface. The Ollama AI provider package is added as a dependency. No changes are made to exported function signatures or public APIs.

Changes

File(s)	Change Summary
.env.example	Added OLLAMA_BASE_URL and OLLAMA_TOKEN environment variables for Ollama integration.
apps/mail/lib/ai-providers.ts	New module exporting AIProvider type and getAIModel function for dynamic AI model selection and instantiation.
apps/mail/actions/ai-composer.ts	Replaced direct model imports with dynamic model acquisition via getAIModel('ollama', 'llava:7b').
apps/mail/app/api/ai-search/route.ts, apps/mail/app/api/chat/route.ts	Switched from hardcoded OpenAI models to dynamic model selection using getAIModel('ollama', 'llava:7b').
package.json	Added ollama-ai-provider as a new runtime dependency.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant API_Route
    participant AI_Providers
    participant Ollama_API

    Client->>API_Route: Send AI request (e.g., compose, search, chat)
    API_Route->>AI_Providers: getAIModel('ollama', 'llava:7b')
    AI_Providers->>Ollama_API: Instantiate Ollama model with env config
    AI_Providers-->>API_Route: Return Ollama model instance
    API_Route->>Ollama_API: Generate text with model
    Ollama_API-->>API_Route: AI response
    API_Route-->>Client: Return AI response

Poem

In the warren, code hops anew,
With Ollama’s models joining the crew!
A single call, the model appears,
No more hardcoding—let’s give three cheers!
From .env to package, the changes are tight,
Now AI selection is dynamic and light!
🐇✨

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[MrgSub]

Thank you! please address coderabbit comments and base on staging

[justserdar]

Codebase has changed a bit, so we need to make adjustments. I am on it this week.