feat: migrate cortex models to llamacpp extension

[louis-jan]

Describe Your Changes

This PR migrates cortex models to the new llama.cpp extension and adds comprehensive test coverage for the migration functionality.

• Cortex models from previous versions (it's quite buggy since it does not scan models folder but retrieve from cortex.db)

• After updated, it could see both imported and downloaded models from hub (from previous version and current version)

Changes

• Migration Implementation: Added automatic migration logic for cortex models to the llama.cpp extension format in extensions/llamacpp-extension/src/index.ts
• Extension Integration: Updated conversational extension to work with the new llama.cpp extension structure
• Test Coverage: Added extensive test suite including:
  • Migration tests for legacy cortex models
  • Updated backend and index tests
  • Enhanced utility function tests
  • Improved test setup configuration

Test Plan

• ✅ All existing tests pass
• ✅ New migration tests cover legacy cortex model scenarios
• ✅ Backend integration tests updated for new extension structure

---

Important

Migrates cortex models to llamacpp extension, updates conversational extension, and enhances test coverage.

• Migration:
  • Added migrateLegacyModels() in llamacpp-extension/src/index.ts to migrate cortex models to llamacpp format.
  • Updates list() in llamacpp-extension/src/index.ts to call migrateLegacyModels().
• Conversational Extension:
  • Renames CortexConversationalExtension to JanConversationalExtension in conversational-extension/src/index.ts.
• Testing:
  • Adds migrateLegacyModels.test.ts for testing migration logic.
  • Updates backend.test.ts, index.test.ts, and util.test.ts for enhanced coverage.
  • Mocks added in setup.ts for consistent test environment.

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[ellipsis-dev]

Caution

Changes requested ❌

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1. extensions/llamacpp-extension/src/index.ts:560

• Draft comment:
  Use the full child path (childPath) instead of just 'child' when pushing into the DFS stack. This ensures proper directory traversal for subsequent fs operations.
• Reason this comment was not posted:
  Comment was not on a location in the diff, so it can't be submitted as a review comment.

2. extensions/llamacpp-extension/src/index.ts:546

• Draft comment:
  Review the modelId extraction using slice() – it can yield an empty string if the currentDir exactly matches the models base path. Consider a more robust method to generate non-empty model IDs.
• Reason this comment was not posted:
  Comment was not on a location in the diff, so it can't be submitted as a review comment.

3. extensions/llamacpp-extension/src/util.ts:65

• Draft comment:
  Be cautious when logging proxy configuration details. Although only a boolean flag for authentication is logged, ensure that sensitive details (like credentials) are not inadvertently exposed in production logs.
• Reason this comment was not posted:
  Comment did not seem useful. Confidence is useful = 20% <= threshold 50% The comment is advising caution about logging sensitive information, which is a valid concern in software development. However, it is phrased in a way that asks the author to ensure something, which violates the rule against asking the author to ensure behavior is intended or tested. Therefore, this comment should be removed.

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[github-actions]

Barecheck - Code coverage report

Total: 35.15%

Your code coverage diff: -0.01% ▾

✅ All code changes are covered

[ellipsis-dev]

Important

Looks good to me! 👍

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1. extensions/llamacpp-extension/src/index.ts:30

• Draft comment:
  Remove duplicate import of 'basename' from '@tauri-apps/api/path'.
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  Confidence changes required: 0% <= threshold 50% None

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[qnixsynapse]

LGTM so far now