Add native DeepSeek provider support

[maulanaaghnii]

Feature Area

Models, AI Services

Painpoint

Feature Request

Hi, thank you for building Smart Second Brain.

I would like to request native support for DeepSeek as a third-party AI provider.

Currently, the plugin supports running locally via Ollama and using OpenAI as a third-party service. However, there is no dedicated DeepSeek provider option in the third-party services settings.

Describe your idea

Why this is useful

DeepSeek is becoming a popular AI provider and many users already use DeepSeek API for chat and reasoning models.

Adding DeepSeek as a native provider would allow users to configure DeepSeek directly without depending on OpenAI settings or local Ollama models.

Expected Behavior

In the "Run via Third-Party Services" tab, there should be a DeepSeek provider option.

Example settings:

• Provider: DeepSeek
• API Key
• Chat Model
• Embedding Model, if supported
• Base URL, optional or prefilled with DeepSeek's official API endpoint

Example DeepSeek models:

• deepseek-chat
• deepseek-reasoner

Current Behavior

At the moment, the third-party service settings only show OpenAI configuration:

• API Key
• Chat Model
• Embedding Model

There is no native DeepSeek option.

Suggested Implementation

Please add DeepSeek as a dedicated provider in the third-party services section.

Alternatives

No response

Additional Context

No response