feat(history): Persistent Race Session History & Performance Analytics Center

[Sanan507]

Overview

Persist complete race execution history across browser reloads using localStorage and build a historical performance analytics dashboard where users can filter past races, compare speed trends over time, and clear stored history.

Implementation Details & File Reference

• History Storage: Create frontend/src/utils/historyStorage.ts to read/write RaceHistoryEntry[] in localStorage.
• Event Hook: Automatically record race completions in SortingPage.tsx, SearchingPage.tsx, and PathfindingPage.tsx.
• History Page Update: Refactor frontend/src/pages/HistoryPage.tsx to display real persistent history entries alongside theoretical complexity matrices.
• Filtering & Clearing: Add filter dropdown (by Arena Type / Winner) and a "Clear History" button wired to localStorage.removeItem().

Definition of Done

• Refreshing the application preserves past race history logs.
• History Page displays real race entries with dates, winner badges, and metric summaries.
• Clear History wipes stored data and updates UI immediately.

Skill Level

Medium — localStorage state management, type definitions, and history page UI integration.