fix: highlight matched text in session search results

[pavsoss]

Closes #234

Summary

Fixes the session search highlighting behavior by visually highlighting the matching portion of session names when a search query is entered.

Changes Made

• Added highlighting for matched search text in session names.
• Implemented case-insensitive matching while preserving the original text casing.
• Ensured existing session filtering/search functionality remains unchanged.
• Added/updated regression tests to verify highlighting behavior.

Test Cases

• Search query highlights matching text in session names.
• Highlighting works with case-insensitive matches.
• No highlighting is shown when the search query is empty.
• Existing session search/filter functionality continues to work as expected.

Screenshots

Before

After

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[pavsoss]

Hey @imDarshanGK please review this