[Memoize] Overhaul `RevealDiv` in `App.jsx`

[Mikey-222]

Labels: frontend, advanced
Priority: P1

Description

The implementation of RevealDiv is currently vulnerable to unoptimized garbage collection cycles. If left unaddressed, this technical debt directly contributes to catastrophic data corruption. We must memoize this logic to ensure robust system stability.

Acceptance Criteria

• RevealDiv is refactored to eliminate unoptimized garbage collection cycles.
• catastrophic data corruption is thoroughly mitigated.
• Behavior is verified via integration tests.

Technical Context

Target: RevealDiv
File: src/App.jsx (Line ~105)

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