📌 Description

This PR addresses issue #1223 by implementing a LocalStorage-backed "Recent Queries" component inside the CodeGraphViewer dashboard to prevent loss of search context during extensive graph explorations.

🚀 Changes Made

• Added recentSearches state hooked up to localStorage key cgc_recent_searches.
• Added logic to automatically capture and sync search queries up to a limit of 8 unique terms whenever the user hits the Enter key in the filter input.
• Rendered a lightweight list of clickable pills beneath the active search form wrapper.
• Clicking a historical search string instantly sets the active query, triggering a graph filter reload, and bumping the clicked query to the front of the recent history.

Resolves #1223