Fix: Title generation in background after resuming of chat

[alashchev17]

Fix: Title generation in background after resuming of chat

Description

• Problem: After resuming of chat with uncalled tools previously, title wasn't generated.
• Solution: Additional flag of isTitleGenerated and updated logic for title generation
• Can't create title in background

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Refactoring (no functional changes, only code improvements)
• [ ] Documentation update

How to Test

• Step 1: Use CodeLens 'Explain' of 'Find Problems' with auto_submit flag set to true
• Step 2: Immediately go to history view page, where all chat threads are located
• Step 3: Return to the chat when streaming is done
• Step 4: Click on 'Resume' to continue response generation coming from model
• Step 5: Go to history view again, wait for the end of streaming
• Step 6: If model didn't try to call any tools, title should be generated correctly. If model called tools, go back to step 3

Checklist

• [x] My code follows the code style of this project.
• [x] I have performed a self-review of my code.
• [x] I have commented my code, particularly in hard-to-understand areas.
• [ ] I have added tests that prove my fix is effective or that my feature works.
• [x] New and existing unit tests pass locally with my changes.
• [ ] Any dependent changes have been merged and published in downstream modules.
• [ ] I have updated the documentation where necessary.