fix: empty tooltip on attachment icon, also fix z-index

[urmauur]

Describe Your Changes

1. In web/screens/Hub/ModelList/ModelHeader/index.tsx:

   • The z-50 class was removed from the Button component. This class might have been related to the z-index, and its removal suggests a possible simplification or a fix for a styling issue.

2. In web/screens/Thread/ThreadCenterPanel/ChatInput/index.tsx:

   • The isModelSupportRagAndTools constant has been refined to focus solely on the result of isLocalEngine(selectedModel?.engine as InferenceEngine). Previously, it also checked if selectedModel?.engine === InferenceEngine.openai.
   • The logic for the disabled property of certain elements has been updated to disable the button if !isModelSupportRagAndTools instead of isModelSupportRagAndTools.
   • The text list item’s className logic was updated to disable user interaction with a "cursor-not-allowed opacity-50" class when isModelSupportRagAndTools is false, reflecting conditions under which interaction should be permissible.
   • For handling file input clicks, the code now checks if isModelSupportRagAndTools is true before executing the file input click and closing the attachment menus. This check prevents actions when the conditions do not support them.

These changes aim to clean up the code, refactor conditions for clarity, and ensure user interfaces respond correctly to model support conditions.

Fixes Issues

• Closes #
• Closes #

Self Checklist

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

[louis-jan]

LGTM

[github-actions]

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[github-actions]

Barecheck - Code coverage report

Total: 69.08%

Your code coverage diff: -0.02% ▾

Uncovered files and lines

File	Lines
web/screens/Thread/ThreadCenterPanel/ChatInput/index.tsx	81, 89, 94, 107-111, 121-123, 128, 131, 157, 166, 172, 174, 240-242, 264-266, 295, 318, 370-372, 374-376, 378-380, 382, 386-387, 399