fix: update scroll issue and copywritting

[urmauur]

Describe Your Changes

1. ModelDropdown Component:

   • Text changes in the ModelDropdown component were made to the rendering of selected models.
   • Updated text from "Select Model" to "Select a model," both in a <span> element and as an Input placeholder.

2. EmptyThread Component:

   • Simplified the text in the EmptyThread component's paragraph.
   • Changed the sentence "You don't have a local model yet." to "You don't have any model".

3. ChatBody Component:

   • Added imports of isGeneratingResponseAtom and threadStatesAtom from the Thread.atom file.
   • Introduced two new state hooks: threadStates and isGeneratingResponse.
   • Defined isStreamingResponse to check if any threads are waiting for a response.
   • Added an effect to handle scrolling when generating responses. This ensures that new messages scroll into view.
   • Adjusted the handleScroll function logic to account for isStreamingResponse. The scroll behavior now prevents default actions if the user is manually scrolling up, ensuring that automatic scrolling doesn't interrupt user interactions.

Overall, these changes primarily focus on UI text revisions and improving the chat response handling process in the ChatBody component.

Fixes Issues

• Closes feat: Prompt user to download model, if no models are available #3537 feat: Pick new model in thread if original model is unavailable #3385 update copy
• Closes Scroll issue

Self Checklist

• Added relevant comments, esp in complex areas
• Updated docs (for bug fixes / features)
• Created issues for follow-up changes or refactoring needed

[github-actions]

Barecheck - Code coverage report

Total: 68.51%

Your code coverage diff: -0.19% ▾

Uncovered files and lines

File	Lines
web/containers/ModelDropdown/index.tsx	119-120, 126, 137, 147-148, 151, 153-154, 156-157, 159-162, 164, 201-204, 206, 208, 227, 231, 240, 247, 250-251, 287-289, 293, 317-319, 321, 325, 328-333, 340-341, 352, 374, 397, 418, 427, 433, 441-442, 445-450, 453, 456, 508-509, 511, 537, 545, 547, 572, 577-578, 580, 584-586, 588-589, 591, 601-604, 632, 640, 642
web/screens/Thread/ThreadCenterPanel/ChatBody/index.tsx	24-25, 27-28, 30, 34-35, 38-39, 41, 43, 47, 64-69, 71-72, 75-76, 81, 83-84, 88, 90-93, 99, 102-106, 111, 113, 118-120, 126, 128, 130-131, 134-135, 138-139, 141, 144-145, 147-148, 151-153, 155, 192
web/screens/Thread/ThreadCenterPanel/ChatBody/EmptyThread/index.tsx	16-17, 19, 28