Unsafe JSON Parsing Leads to entire application will crash (White Screen of Death).

**Location**: `frontend/src/Pages/DebateRoom.tsx `

- Issue: JSON.parse(savedState) is used on data from localStorage without a try-catch block.

- Fix: Wrap JSON.parse in a try-catch block and fallback to default state if parsing fails.

**Why: If local storage data is corrupted or the schema changes, the entire application will crash (White Screen of Death).
fix this issue**

@bhavik-mangla Please checkout this solution #299