Add state management persistence layer with automatic hydration and versioning

Problem Statement

Vue applications lose state on page refresh. No built-in mechanism for persisting state to localStorage/sessionStorage with automatic hydration. Complex versioning for state schema changes. Developers implement custom persistence logic repeatedly.

Business Impact: Improves user experience with persistent app state, reduces data loss incidents, enables offline-first applications, increases user retention.

Root Cause Analysis

State management is independent of persistence. No standard way to sync with storage. Schema versioning requires manual handling across all apps.

Solution Overview

Implement state persistence layer:

• Create composable state persistence
• Build automatic hydration system
• Implement state schema versioning
• Support multiple storage backends
• Add encryption for sensitive data
• Create DevTools integration for debugging

Implementation Steps:

1. Design composable persistence API
2. Implement automatic storage sync
3. Build versioning and migration system
4. Add encryption support
5. Create DevTools plugin

Type of Change

• Enhancement (state management)
• Persistence system
• Developer experience

Testing Done

• Test 30+ state management scenarios
• Verify persistence accuracy across browser restarts
• Test schema migrations with 10+ versions
• Performance testing with 1MB+ state
• Cross-storage testing (localStorage, sessionStorage, IndexedDB)
• Encryption verification and performance
• Long-running stability tests

Related Issues & Standards

• Web Storage API standards
• State persistence best practices

Suggested Labels

• enhancement, state-management, persistence, developer-experience, GSSoC26