feat(lm-studio): add native model discovery and capability detection

[AnishSarkar22]

Description

• Discover models through LM Studio’s native /api/v1/models endpoint.
• Fall back to legacy v0 and OpenAI-compatible discovery when unavailable.
• Detect chat, vision, embedding, tool-use, and context-length capabilities.
• Preserve user capability overrides during rediscovery and frontend filtering.
• Add explicit authentication, malformed-response, and connection error handling.
• Add focused backend unit tests.

Motivation and Context

FIX #

Screenshots

API Changes

• This PR includes API changes

Change Type

• Bug fix
• New feature
• Performance improvement
• Refactoring
• Documentation
• Dependency/Build system
• Breaking change
• Other (specify):

Testing Performed

• Tested locally
• Manual/QA verification

Checklist

• Follows project coding standards and conventions
• Documentation updated as needed
• Dependencies updated as needed
• No lint/build errors or new warnings
• All relevant tests are passing

High-level PR Summary

This PR implements a custom model discovery mechanism for LM Studio connections by adding support for LM Studio's native API endpoints (/api/v1/models and /api/v0/models) with fallback to OpenAI-compatible discovery. The changes include a new discovery strategy in the provider registry, comprehensive parsing logic for LM Studio's model metadata including capabilities like vision and tool support, robust error handling, and a frontend capability override mechanism to respect user-defined model capabilities.

⏱️ Estimated Review Time: 15-30 minutes

💡 Review Order Suggestion

Order	File Path
1	surfsense_backend/app/services/provider_registry.py
2	surfsense_backend/app/services/model_connection_service.py
3	surfsense_backend/tests/unit/services/test_lm_studio_discovery.py
4	surfsense_web/components/settings/model-connections/model-utils.ts

[vercel]

@AnishSarkar22 is attempting to deploy a commit to the Rohan Verma's projects Team on Vercel.

A member of the Team first needs to authorize it.

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 6c701232-ecf2-4456-afe5-86a1e24693c9

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}