fix: 4162 - Graceful Openrouter error handling

[louis-jan]

Describe Your Changes

This PR aims to handle error messages returned by OpenRouter gracefully. Unlike others, it doesn’t return JSON but a stream message.

Fixes Issues

• bug: OpenRouter stream error response not properly handled #4162

Changes made

The code changes remove certain debug logging statements and add error handling logic:

1. OAIEngine.ts:

   • Removed debug statements that logged the inference URL, headers, and the inference error as a JSON string.

2. sse.ts:

   • Added logic to handle errors received in the SSE data. If the parsed data contains an error, it triggers the error handling in the subscriber, marks the stream as complete, and exits early to prevent further processing.

These changes improve error handling and reduce unnecessary logging output.

[github-actions]

Barecheck - Code coverage report

Total: 69.27%

Your code coverage diff: -0.05% ▾

Uncovered files and lines

File	Lines
core/src/browser/extensions/engines/OAIEngine.ts	59, 71, 108, 136-138, 166
core/src/browser/extensions/engines/helpers/sse.ts	37-38, 74-75, 81-83, 87, 93, 100