feat: add quick file selection upon tagging on Chat input

[taprosoft]

Description

• Improve inline citation logics
• Fix table row flickering issue
• Add quick file selection upon tagging on Chat input
• Improve UX by focusing on Chat input upon common tasks

Type of change

• New features (non-breaking change).
• Bug fix (non-breaking change).
• Breaking change (fix or feature that would cause existing functionality not to work as expected).

Checklist

• I have performed a self-review of my code.
• I have added thorough tests if it is a core feature.
• There is a reference to the original bug report and related work.
• I have commented on my code, particularly in hard-to-understand areas.
• The feature is well documented.